Sig Virtus MCX PCP air rifle: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Sig Virtus
Sig Virtus.

Part 1
Part 2

This report covers:

  • The test
  • Sight-in
  • Sorry Sig!
  • Sight-in again
  • First three pellets
  • HOWEVER
  • Discussion 1— the trigger
  • Not semiautomatic
  • JSB Exact RS pellets
  • Next test
  • Crux Ballistic Alloy 5-shot group
  • Summary

Today we begin looking at the accuracy of the new Sig Virtus MCX PCP air rifle. Since we know that this rifle has a heavy trigger, this should be an interesting test. We also know that the Virtus gets a LOT of shots on a 3000 psi fill — over 150 in our test in Part 2. So I will fill it once and not worry after that.

The test

I shot the rifle off a sandbag rest with the rifle rested directly on the bag. Because it is a pneumatic I can get away with that. I started out shooting 10-shot groups but switched to 5-shot groups in the middle of the test. I will explain why when we get to it.

Sight-in

I began sighting in the rifle using the back-up iron sights (BUIS) that came on the rifle. They adjust in both directions and I thought they would be a good thing to test. Well, the Virtus I am testing was shooting about 6 inches low at 10 meters. I  used the sight adjustment tool I showed you in Part 1. I adjusted the front sight that adjusts the post down as low as it would go which brings the pellet up as high as it will go. Even with that the rifle was still shooting 2 inches low. 

Sorry Sig!

So off came the BUIS and I installed a UTG Micro Reflex dot sight. I took it off the Diana Bandit that still has another test to go, so I’ll have to remount it and sight it in again, but this sight is so quick and easy to mount and adjust that I thought it was my best option. Only after the test was conducted and this report was half written did I remember that Sig had also sent me a Romeo5X-XDR compact red dot sight to test with this rifle and with the AEG MCX airsoft Virtus that I haven’t started testing. Duh!

The Romeo5 is a high-end dot sight that deserves a blog of its own, so the next time I test the Virtus I will have it mounted for you. In fact, that report will be on the Romeo5, with the Virtus serving as the testbed. Today’s report will serve as our baseline.

Sight-in again

After mounting the dot sight I had to sight in once more. Fortunately the UTG dot has a large range of adjustment and I was able to get on target pretty quick.

First three pellets

I started out shooting 10-shot groups with the three pellets that were used in the velocity test in Part 2. First were the JSB Hades that grouped 5 of the 10 shots in 0.327-inches at 10 meters. Unfortunately the other five shots were scattered about, opening the group up to 2.181-inches. I am not showing that group or many of the others I shot, because I know why the shots scattered. Remember that heavy trigger? Well, I discovered that I was moving the rifle off the target some times as I squeezed the trigger . So here comes my first bit of wisdom about this Virtus.

The Virtus is for plinking — not for targets!

This PCP is made to shoot rapidly at action targets. It is not made to shoot groups. If you will do that, you will not be disappointed. HOWEVER…

HOWEVER

The ten Beeman Kodiak pellets I shot next also did not group well, but ten of the Sig Crux Ballistic Alloy pellets were a different story! I had already fired about 35 shots by this time (that includes both sight-in sessions) and my trigger finger was getting tired. So I slid it into the trigger blade one more joint and tripled its power. Suddenly the trigger became much easier to squeeze — to the point of the rifle firing before I expected. Apparently that is one secret to shooting the Virtus, because the 10-shot Crux Alloy group measures 0.91-inches between centers, with nine of those shots going into just 0.507-inches at 10 meters!

Virtus Crux Ballistic Alloy 10-shot group
Nine of those ten Crux Ballistic Alloy pellets are in 0.507-inches at 10 meters! The group measures 0.91-inches, overall.

Discussion 1— the trigger

I loaded and shot several more 10-shot groups and discovered one thing from all of them. My trigger finger pulls the rifle side-to-side and gives horizontal groups every time. I’m not showing those groups because they were entirely my fault.

From all of this I learned the right way to pull the Virtus trigger. Slip your trigger finger into the trigger blade one additional joint, so you have the entire power of your finger. I’m writing this as much for me as for anyone, since it will save me a lot of time the next time I test the rifle.

Not semiautomatic

This test revealed the true nature of the Virtus trigger, because to group well I had to concentrate. In concentrating I could see what the heavy double action trigger was doing to my accuracy. The rifle is accurate — I just had to learn how to shoot it! It has been several years since I shot the Sig MCX CO2 rifle, and I think I’m being reintroduced to a trigger I once knew how to control. Okay, let’s move on.

JSB Exact RS pellets

Right after shooting the Crux Alloy pellets I tried 10 JSB Exact RS domes. They have me another horizontal group that measures 1.147-inches across, but within the group six of the pellets are in a group measuring 0.281-inches between centers. That is good enough for me!

Virtus RS 10-shot group
Yes, the ten JSB Exact RS domes are in 1.147-inches, but six of them are in 0.281-inches. That’s an invitation to test further.

Next test

This is where I switched from 10 shot groups to 5-shot groups. By this point in the test I had fired 85 shots and was getting tired from the concentration. But I knew I could hold it together for a couple more groups. I had the trigger down pat and I increased the brightness of the dot to see it more clearly in the black bull.

JSB RS

Concentrating fully I put five JSB Exact RS pellets in 0.357-inches at 10 meters. Goodie!

Viretus JSB RS 5-shot group
And this is what you get when you press on! Five JSB Exact RS pellets are in 0.357-inches at 10 meters.

Crux Ballistic Alloy 5-shot group

The last group I shot was with 5 Crux Ballistic Alloy pellets. They made a horizontal group that measures 0.574-inches between centers. That told me I can rely on the Virtus to shoot accurately — I just have to do it right. And now I know what that means.

Virtus Crux Alloy-5-shot group
And five Crux Ballistic Alloy pellets went into 0.574-inches at 10 meters.

Summary

Today was a learning situation. The Virtus is a unique air rifle in several ways and I had to learn how to manage it right. Once I did, I got good results.

It’s still a fast-firing 30-shot PCP repeater, and I’m not certain I have uncovered all of its value in today’s test. But the next time I test it I can get right to the good stuff.

As you can tell, I did adjust the sight several times during this test, but I was more concerned with accuracy than where the sight was. So my groups are all over the target paper. That doesn’t mean anything, other than I can now adjust the sight to hit dead-center with the most accurate pellets.

My next report will be on the Romeo5X-XDR dot sight mounted on the Virtus. Until then — stay tuned!

82 thoughts on “Sig Virtus MCX PCP air rifle: Part 3

  1. BB
    Will one of the next reports on this gun tell about any fast action can shooting by chance. And at what distance is the maximum for the gun that seems to feel comfortable shooting at.



  2. B.B.,

    With an 8 pound trigger pull I wouldn’t be surprised by your difficulty in maintaining concentration. That’s probably why people look for a good trigger, so they can concentrate on the target instead of the trigger. Maybe the trigger will improve with use?

    Siraniko



      • I still say my Sig MPX trigger is not a 8 pound trigger. I dont have a trigger gauge but I definitely have felt much harder to pull double action triggers.

        Making me wonder if the Virtus teigger is really a harder to pull trigger. Why it wouldbe I don’t know. But the MPX trigger is not bad at all. ???


  3. BB,

    Please pardon me, but it just don’t trip my trigger.

    Except on very rare and very brief occasions, rapid fire just is not for me. I would much rather place one long range shot on POA. It’s a me thing.

    I can see where GF1 and others would enjoy it though. Now I might be able to get into a tacticool compact Huben K1 as long as it retained a modicum of long range accuracy.



      • GF1,

        That is the K1. I saw a video of a dude hitting a ping pong ball at over 300 yards with one.

        Now, if you want to see me get really excited, hand me one of these…






          • BB,

            Oh, I know. I am afraid my dream of owning a Lincoln Jeffries air pistol to go with my 1906 BSA is not likely ever going to happen. Being the rich person in the family means I am not likely going to receive a large inheritance.



          • Ian,

            It is a Lincoln Jeffries air pistol. I am not positive, but I believe it to be pre WWI. He is the gentleman that designed my Lincoln Jeffries Model 1906 BSA. Just thinking about it makes my knees weak. You may rest assured that should one move into RidgeRunner’s Home For Wayward Airguns it would not be sitting in a glass case.


            • For us nostalgia nerds, it would be neat if someone would make a replica that actually shoots.

              But for display only purposes I think you could make one out of a couple of trips to a hardware store, and some kydex.

              Then be good at painting to add the (I hate this word) “patina”.

              I prefer the terms of well used, or well loved, or well enjoyed.

              Ian.



        • RR
          Nice guns. But back to the subject that surfaced.

          Are they a semi automatic type action that can plink at let’s say a gallon milk jug at 75 to a 100 yards rapid fire style?

          Now that would be a fun gun.


          • GF1,

            If you are willing to shell out the big bucks, the Huben K1 is capable of hitting feral soda cans at that range. If you want to shred a pile of feral soda cans at 100 yards, you want a LCS SK-19. It is the tacticool version of the K1.

            What is really awesome cool about these is the valve system is hammerless.


            • RR
              I have looked pretty hard at the LCS SK-19.

              I think that is possibly a good thing that it is hammer less. But I still have my doubts about reliability. I don’t care how accurate the gun is. If I can’t pick it up and pull the trigger and the gun shoots every single time than I want no part of the gun.

              I would want it for multiple reasons. First off it would get shot every day for target shooting and plinking at multiple distance. But here is why I want reliable. I would use it for home defense in multiple ways. And that’s a little dificult for me to explain here on the blog. But reliability is a big thing.

              If it was reliable and accurate I would think about selling a few air guns and possibly even a firearm or two. But I’m thinking that wont happen because I don’t have faith in the LCS yet. Probably won’t either till I own one and see for myself. Which probably won’t happen at that cost either. Alot more negatives than plus’s is what I see.

              I think I’ll just keep the guns I have and use my $200 HPA MPX for the rapid fire yard plinking. And my Winchester model 190 for the longer distance rapid fire plinking. Plus I already own them so no extra cost on my part. How about all of that.


  4. BB,

    Bummer on the front sight adjustment. Perhaps SIG will take note and modify it, or the rear peep holes,.. to compensate,.. if it is in fact an across the board issue.

    Being from SIG and given the price point,… I would have thought better than a 8# second break.

    Question(s): Looking at the picture on the PA site,.. and even the SIG site,… there is something that is under the shroud, about 1/2 way down the barrel. What is that?

    Also, is the front sight, the shroud and the barrel all tied/supported together? It is difficult to tell from the pics.

    Lastly,… is there any chance the shroud is flexing upwards as you rest the rifle,.. (counter acting) your down adjustments of the front sight? In other words, the shroud and sight are moving up,… while the barrel is remaining still.

    Good Day to you and to all,……… Chris


    • Chris,

      Okay — this is where the correct terminology is important. The Virtus doesn’t have a shroud. That is the forearm you are referring to. It cannot flex, because it is not touching the barrel anywhere. The barrel is stout and free-floating.

      I believe on the Virtus firearm that would be the gas trap you are looking at. I think on this airgun it is just decoration and serves no purpose. But I will ask Sig.

      B.B.


      • BB,

        Thank you for the terminology correction. To me, (if) that front sight is not tied to the end of the barrel directly and (if) that forearm flexes even the slightest while being rested,… the front sight is moving around independently of the barrel. I guess that is the general point I was trying to make, in response to it shooting low and running out of adjustment.

        Chris



        • Chris
          You layed off work right now or on another shift?

          Or are you using your smart phone now to make comments at work?

          You usually don’t post this time of day. Another reason smart phones are nice for multiple reasons if you think more about what I mentioned.


          • GF1,

            Yup,… laid off. The company is shutting down. Long story. I am good on funds and have spent the last week looking at the job sites and doing research on different places. 12 hour, rotating shifts, rotating days off, etc.,…. seem pretty common now. The four 10’s that I was doing was enough for me. Some places that you think you might want to work at,… after a bit of good research,… not so much.

            Might have a real good lead lined up. A perfect fit for the company and stuff I am already familiar with.

            Not seen Hank on here in awhile. I sent him an e-mail today to check in. Not heard back yet.

            Chris


            • Chris
              Haven’t talked to Hank in a while either. Hope all is well.

              And glad your good on funds. Didn’t this happen awhile back and they had a position for you. Or is the place done now?

              And to say I know what you mean about companys now days. I think if I get layed off I’m going to get a custodial job at a hospital or library or something. No more of this technical stressed out get a machine working again stuff.

              Well tired of it. I’m ready to be done with this work bull.

              I hope you get what your looking for. Sorry for ya.


            • Chris,
              Very sorry to hear that your plant is shutting down. Didn’t give you much notice did they? Glad you have some savings to fall back on. That’s the reason everyone should have at the minimum, three months of savings (emergency fund) to cushion the blow. As I recall, Ohio doesn’t pay much in the way of unemployment either. This may a blessing in disguise. I’m not sure there are ANY good companies to work for anymore. There sure isn’t anything like we used to call “job security”, that’s for sure. Keep us posted, and good luck with the interview.
              Geo


              • Geo,

                Thanks. The interview went well and expect another call. I was perfect fit.

                Yea,… it is tuff out there. As I stated to GF1, after you do some “digging”, places that you thought would be good are not so much. There is no where to hide on the internet. Plenty of sites are nothing but reviews from employee’s.

                Chris


              • Geo,

                Yes,… “job security”. Rare now. That “security” cost many a company $$$ and eventually cost them “the farm”. Like unions,… all great and high times,… (while) you are working for them. Problem?,… all they want is “more, more, more” and that has sunk many a big ship.

                It is cut throat competition now and the worker is (often?) the one getting the brunt of cutting whatever corners are the latest to be getting cut. Not to mention,… some new up and coming company coming right on your tail (that will probably fail anyways too),.. but in the mean time,.. will take you down with it.

                I am SOOOO ready to be retired already! 🙂 LOL! Chris



                  • GF1
                    The closer to retirement age you get, the stronger that feeling becomes. I had to take anti-anxiety drugs the last five years that I worked. The doctor asked me “do you ever want to hurt yourself?”, and my answer was no. Then he asked “do you ever want to hurt anyone else?”, and my answer was..EVERYDAY! He couldn’t give me meds fast enough. I did manage to make it to retirement without going to jail. 😉
                    Geo


  5. BB
    I propose an adjustment to a proverb that takes into account the fact that people are living longer.
    ” Your never to old to learn “, what you already knew … but forgot! Works for me.
    If I did not already have the MCX I would probably get this one. I was looking forward to getting it but the low FPS disappointed me, especially being made a PCP. Seems to be just an upgraded CO2 rifle that may develop problems with the higher PSI required.

    BB, have you stopped sending replies to entries on the blog to our email as notification. Or, was it the result of a hacker.
    I missed a few reply comments/questions about my MCX air bottle conversion.
    I see they were already answered by someone else and it turned out to be good because I did not have the information documented or stored in my rememberer. Just tested it for operation as I remember.
    Bob M



      • Bb
        Email posts from the blog to me keep showing up in the promotions for a long time since all this started happening.

        I think IT needs help. They need someone identifying the problems that are happening. They seem to not know where to look.


        • GF1,

          No, that’s not it. IT has now moved several major websites to new servers and dealt with thousands of compatibility problems along the way. They are still dealing with them on a punch list that is hundreds of items long. Fixing the email function on this blog is akin to trimming someone’s toenails while they are undergoing a heart transplant.

          B.B.


          • BB
            Bummer. You would think it’s all important.

            And why did I say that. I know it is. Its just like too crazy anymore.

            Do they overload theirselves with to much what should I say.

            Responsibility to all their customers. In a sense.



  6. Well, not very accurate. I guess designed for fast action. What irks me is the pellets it likes! Those Sig alloy pellets are EXPENSIVE!! At around $60 for 500, this this combination is better suited for target shooting than fast action. My Ruger 1022 LR is cheaper to shoot. I have a Gamo Swarm Maxim multi shot that only likes alloy pellets too. If I get this Sig, air gunning will become an expensive sport for me. A couple years ago I bought a lovely, cheap, accurate CZ 634. It’s a tack driver with the cheap RWS Hobbys so I stocked up. Beautiful match made in heaven! Then came the price hike in the price of RWS Hobbies! As Chris would say. Bummer!! RANT RANT. Lol




  7. Tough crowd today. Here’s a product doesn’t know what it wants to be, but it does look the part.
    There’s a slew of very accurate, hard hitting bull pups and PCP’s all with magazines and moderators
    for just a little more money.
    This is a warmed over MCX/MPX which are fun, but I think Sig is missing the fun part here., how about 5,000 rounds of airsoft conicals for 10 or 15 bucks? How about accuracy, tri burst or select fire?A lot of effort on that belt. Keep trying Sig.
    I just need to hit a few cans and steel plates in the yard about 25 yds or so, this is a nice copy, but a little expensive for doing what it can do.
    Best,
    Rob


  8. What I’m wondering about is our thought of a longer barrel on a pcp usually increases velocity. Is it actually helping this regulated gun that shoots at a pressure that is closer to Co2 guns.

    Maybe its slowing velocity up. But gaining shot velocity over Co2. I think that’s a good thing actually.

    I bet if this gun was run on co2 it would be a real slug. And by that I mean not a very good rapid fire gun.

    What this gun is a very nice plinking gun with the velocity it works at.

    And here is something for you all that don’t rapid fire plink. Trigger pull and sighting works alot different. Timing is involved for normal target shooting and such when the trigger gets pulled. Rapid fire shooting is like having another sense. You have to feel it. You do learn the gun as you go. But in a different way than target shooting or pesting or hunting. Think of bird hunting with a shotgun.

    There has to be someone on the blog that knows what I mean. Isn’t there?


  9. Gunfun1,

    What you described made me immediately think of air to air gunnery practice with the aircraft’s cannon! Since it happens in 3D with both shooting platform and the target moving in space.
    Think of it as a little like shooting from one swing at another person swinging on a swing set. Not much time to line up sights!

    shootski


    • Shootski
      Right. You learn to reaction shoot. After doing it enough with a given gun and load you eventually learn a different type of (hold) on that gun. That being where to place the sights for that given target at that time.

      I dare to call it a modified Kentucky Windage hold. I know you know what I mean.


  10. B.B.,

    How does the barrel attach to the receiver? Slip-in and set screws? If so how many? Orientation? Barrel Nut? Threaded with female receiver and male barrel? Some other method? How does SIG AIR test alignment with the rail?
    Is it possible to remove material from the top of the front sight post if everything else is within specifications?

    shootski


    • Shootski
      The MPX I had the first time around I took apart. The barrel was locked into the receiver well in multiple ways. No slipping the barrel out easily.

      And the barrel to the rail will probably cause some “trueness” problems. Maybe even so on the firearm. But I really believe the problem with the low hitting of the pellet to sight relation is because of the close distance BB is shooting at. I have said this before and will say it again. Scopes that are mounted high above the barrel do the same thing at a closer distance. You have seen it before haven’t you?


  11. Gunfun1,

    I get it! BUT 6″ is outside that possibility! Well unless the front sight was topped out.
    I have front and rear BUIS on my ARs that are each adjustable for elevation changes as well as front post that can be set to three different widths. Having both able to alter elevation may seem odd but it really helps with cowittnessing with different optical systems!

    shootski


    • Shootski
      Probably so.

      I think I tried the factory sights on my MPX when I got it and ran into something similar.

      I’m going to sleep right now so not going out to look at my MPX. But doesn’t the rear sight as well as the front sight adjust for elevation. If so maybe that’s the problem BB is having.

      Maybe they need adjusted opposite to each other to get on target. I’ll check my MPX out later when I get up. Or post something if you find out different in the meantime. I’ll see it later.


  12. The rear sight,
    It appears to be the same as on the MCX, windage only. Elevation is adjusted with the front sight. Adjusting the front sight position view within the larger rear sight aperture may help compensate, but any cheep dot sight would probably do the trick as well as some low cost fully adjustable replacements. How could they even let something like this get out the door? Wonder if that flash hider comes into play here?

    I also agree with GF1. These sights are about 3″ above the center line of the barrel. No big thing for a real AR shooting at a man size target at a distance, think carry handle mounted sight.
    They are probably being used so they work with the the height of the bottle stock, shooting low up close is the unintended consequence. They should have at least used a simple height changing dual aperture for close up targets on the rear sight, in my opinion.
    Bob M


  13. Rapid fire plinking,
    Like anti aircraft guns have tracers to walk the rounds to the target, full autos walk the impact points to the target and demolish it when they arrive. It doesn’t take too long to get the feel of your semi-auto rifle firing rapidly from the hip to get on target either. And that’s the challenging fun part of it. Your not usually trying to save ammo here anyway or develop your one shot one kill talent.
    Unless you have a very stable rifle, sights don’t help much during rapid fire. Recoil recovery time kind of prevents it. Practice will allow you to compensate for recoil when firing from the hip.
    Now low recoil CO2 and PCP’s may be another story. Especially the heavier ones.
    Bob M
    Note: My phone died a few weeks ago and I just got an old new replacement from my daughter and need to figure out how to use it all. Too much complicated new technology too fast for my simple needs. Holding off pictures for a bit.
    Bob M


  14. Bob M,

    Regarding the new/old cell phone, I’m using one that our Granddaughter discarded. Still learning after several months. Once in a while I get frustrated enough to call her to find what I need to do to solve some problem. Hate to do that though, makes me look old and dumb.

    Oh wait, I am old and dumb!

    Dan


    • GrandpaDan
      We grew up when things used knobs and buttons to operate and got along just fine without 99% of the things on todays phones and everything came with written instructions.
      It’s hard to keep up with things you have no real use for and you eventually fall so far behind you cant catch up. Being retired and out of main stream life certainly reduces the need to know.
      Old for sure, but dumb? I feel blessed I can live a simpler life than the kids of today have. But don’t try to convince them. They seem to accept a shorter life span living on the edge of crisis all the time.
      Bob M


      • Bob
        I think we lived on the edge a different way when we was kids. I know I did with all that muscle car stuff I messed with throughout time.

        But there are still some kids out there that get their hands dirty with performance cars. I guess the edge is still out there. 🙂


    • Dan
      Kind of funny but opposite thing happened just recently with me and my oldest daughter.

      She has had her phone for like 6 years. I was really proud of her actually for keeping that long. Andyesitsstill working.

      But I bought her a new smart phone for her recent birthday. She couldn’t get it to activate. Long story short dad got it going for her. Everybody is all happy again. Thank goodness. 🙂


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