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Education / Training RAW HM-1000X precharged air rifle: Part 3

RAW HM-1000X precharged air rifle: Part 3

RAW HM 1000X
The RAW HM-1000X. This is the new chassis system.

Part 1
Part 2

This report covers:

  • RAW Knoweldge Center
  • Correction
  • The regulator
  • What do we want to do with this HM 1000X?
  • Discussion
  • Chassis system is different than the wood-stocked rifle
  • Adjusting the trigger
  • I want stage two to break heavier
  • Screw sizes not given
  • Adjust the regulator
  • Summary

Today we adjust the trigger and look at adjusting the velocity of the .22-caliber RAW HM-1000X chassis system rifle that I am testing.

RAW Knowledge Center

First I want to direct you to the RAW Knowledge Center. There you will find excellent tutorial videos, as well as manuals, articles about the rifles and the contact information for RAW dealers around the US and the world.

The videos are excellent! I wish I could make them that good. They are clear, concise and each one covers just one technical point. They are only a few minutes long each and are probably much better than a good manual.


Now I have to make a correction to what I’ve been telling you. I don’t jump ahead on any of the tests that I do, so I’m only 24 hours ahead of you when I write any blog. When I learned that the power of the HM-1000X rifle is user-adjustable, I assumed it would be like any other precharged pneumatic with that feature. In fact it is not.

The hammer spring for each RAW rifle produced is custom cut for that specific rifle. And it is cut to produce the lowest possible velocity (in the range of velocities for the rifle, per caliber). Instead of a wide range of power adjustments like we find on most other PCPs, the hammer spring on a RAW HM 1000X Chassis System rifle is supposed to be fine-tuned for one particular pellet. You obviously need to select the most accurate pellet for whatever you are doing, and then adjust the hammer spring tension for that one pellet. In past reports I have been talking about adjusting the power like this is a PCP with a wide range of possibility, but it isn’t.

The regulator

To make larger velocity changes with this rifle you first need to adjust the regulator. Then when you get that set where you want, use the hammer spring adjustment to fine-tune the velocity to where you want it.

What do we want to do with this HM-1000X?

I’ll be frank with you — the HM 1000X rifle is designed to be accurate at long range. This is a rifle that enables you to shoot small groups or bullseyes at 100 yards. The .22 caliber rifle should be just as accurate as the .25 and the .30, but it’s more difficult to see the pellet holes left by a .22-caliber pellet through a scope sight at 100 yards when they are in the black bullseye. Hence the .25 and .30 calibers are more popular in this rifle. But they aren’t necessarily more accurate.

Can this rifle be used for hunting? It certainly can, and it is ideally suited for some kinds of hunting, like woodchucks and prairie dogs. Imagine setting it on a bipod or even a tripod and picking off those destructive rodents while sitting in a comfortable blind. 

Squirrels in the deep woods? Not so much. This rifle is heavy and long and not well-suited to treks through the bushes. But for ground varmints like I mentioned, it’s ideal.

Hunting Guide


Now that you understand the design parameters, you will appreciate why I am not going to sit at my chronograph today and blindly make adjustments. I will show you what must be done, but I won’t do it — at least not yet. If I did I would be like one of those buyers who has a new airgun shipped directly to a tuner before they ever shoot it. 

I’m going to ask you to watch the tutorial on adjusting the hammer spring tension on the chassis system rifle. Once you do that you will be up to speed with me for today’s report.

Chassis system is different than the wood-stocked rifle

I realize that you readers all understand that the wood stock is different than the synthetic stock that comes on the same model rifle with the chassis system. But you may not appreciate that to accomplish the same thing, which, in this case, is a hammer spring adjustment, you must go through different procedures. Hence there are two different tutorial videos in the RAW Knowledge Center. I’m not going to show the tutorial for the wood stock adjustment, but if you want to watch it, just follow the link I gave you above to the RAW Knowledge Center. The only difference is how the hammer spring adjustment screw is accessed.

RAW 1000X hammer spring adjustment
Insert a small Allen wrench into those small holes in the hammer spring adjuster (arrow). Pull down to increase tension and up to decrease.

Adjusting the trigger

I reported in Part 2 that the trigger on the test rifle is two-stage. Stage one took 7.8 ounces when I tested it last time and stage two broke at 9.2 ounces. The difference between stage one and two was 1.4 ounces. So that is how light this trigger is. You can forget about stage one. It is so light that you barely feel it. And, when the trigger stops at stage two, all it takes to fire the rifle is 1.4 ounces of pull. I know some of you talk about triggers that are set for mere ounces of pressure. This is one of them! Seven out of ten shooters will fire the gun before they are ready, in my experience. Unless you have a lot of experience with a 10-meter trigger, you aren’t going to feel this one.

So, in the interest of preserving the ceiling and walls of my house, I want the second stage to break heavier. I tested the trigger-pull again today, because it is so light I felt I might have glossed over it in the Part Two test. I tested stage one many times today and came up with 6.8 ounces as the absolute minimum. And 8.1 ounces was where the rifle fired. The trigger was measured lighter today, not because it changed but because I took extra care when measuring it. So the difference between stage one and two is just 1.3 ounces. Notice that the difference between stage one and two remains fairly constant, though the absolute numbers do change.

I want stage two to break heavier

I want stage two to break heavier. Twice the pressure would be nice but I don’t know if it will go that high. Let’s look at the adjustment instructions.

RAW 1000X trigger adjustment
From the RAW manual.

Screw sizes not given

The one thing that caused me some consternation was that the trigger adjustment screw sizes are not given in the manual. The screw that is labeled A in the graphic above — the one that adjusts trigger pull — is not out in the open like the graphic depicts – — at least not when the barreled action is in the stock. It’s deep inside the front of the triggerguard, where it’s difficult to assess the screw size. Since the other RAW screws are metric, I guessed that this one was, too and I finally got the size right on the third try. It’s 2.5 mm.

RAW 1000X trigger screw A
Screw A to adjust the trigger pull weight is way down deep inside the triggerguard (arrow). It’s 2.5 mm.

Next, after watching the other videos in the RAW Knowledge Center I was primed to make 1/4-turn adjustments to the screw. Nope! You’ll be there all day if you do. So, after two tries I reverted to a good old boy airgunner and cranked it two full turns clockwise. That worked. The test rifle now has a first stage that takes 10.4 ounces and a stage two that breaks at 15 ounces. That’s enough of a difference that I don’t need safecracker’s fingers to shoot safely!

Adjust the regulator

If you watched the video on adjusting the hammer spring tension you heard the man say that making gross power changes requires adjusting the regulator first. Once again, I have no idea of how the test rifle is shooting currently so I’m not about to start twisting screws and adjusting things.

But here is the deal. To adjust the regulator you first remove it from the rifle. The RAW regulator removes by first removing the air reservoir, a 29 cubic-inch carbon fiber air bottle on the test rifle. That is described for you in the following video.

After that the reg. comes off and you can adjust it. You saw how that was done in the video. Unfortunately that video showed the wood stock gun and I have the chassis system gun. So watch the video on the chassis system replacing the wood stock, called Chassis Installation. That shows (in reverse) what must be done to separate the chassis from the barreled action, so you can get to the regulator.


Wow — that was a lot of stuff, and here is why I told you about it today. I misunderstood how the RAW HM-1000X operates and how it is set up. As a result of my misunderstanding, my approach to testing the rifle was flawed.

And there will be no more velocity testing. What I need to do now is find a super accurate pellet. Then I can fine-tune the powerplant for that one pellet. It’s a different kind of test, but the RAW HM-1000X rifle is a different kind of air rifle.

author avatar
Tom Gaylord (B.B. Pelletier)
Tom Gaylord, also known as B.B. Pelletier, provides expert insights to airgunners all over the world on behalf of Pyramyd AIR. He has earned the title The Godfather of Airguns™ for his contributions to the industry, spending many years with AirForce Airguns and starting magazines dedicated to the sport such as Airgun Illustrated.

49 thoughts on “RAW HM-1000X precharged air rifle: Part 3”

  1. B.B.,

    This is a purpose built rifle for bench level accuracy. That really is a radical idea compared to most rifles that you have been reviewing in the past that were more for general purpose. I suppose you will start your quest for the best pellet at 25 yards and move out from there. Is there a recommended velocity for weight of pellet?


  2. Cool rifle. Here’s a small edit, for the good of the Order:

    Chassis system is different than the wood-stocked rifle
    I realize that you readers all understand that the wood stock is different than the synthetic stock that comes on the same model rifle with the chassis system. But you may not appreciate that to accomplish the same thing, which is [in] this case….

  3. With the hammer spring at factory setting on my HM1000X in .357, it is producing about 80 FPE. By tightening the hammer spring all the way down, it will produce 100 FPE. Martin Rutterford has told me that by adjusting the regulator I can take this air rifle up to 160 FPE. He has one in .357 that he says produces over 200 FPE.

    The first time I shot this rifle, I put five shots in one inch CTC at 100 yards. A friend of mine owns three of these in various calibers. One of his was .30, but he changed it to .177 recently. This is something that is very easy to do in the smaller calibers. The .357 though requires a slightly larger action block.

    I really need to find that ’round tuit’ of mine and adjust that regulator up and tune it for cast bullets. It is legal to hunt deer here with a .35 caliber air rifle. 😉

  4. Peep sights are an interesting subject.

    I bought two sights from some guy in Romania, but neither of them would fit my Diana 27. Happily, I eventually ordered an Air Venturi peep sight that fit nicely and seems to work just fine…or, would but for one problem. And, this is a problem that I’ve had with peep sights before, so it’s not the Air Venturi sight’s problem.

    Years ago, peep sights and I got along very well. But, my eyes are now in their early 70’s. I don’t know why, but when I look thru the peep sight now I see a fuzzy blob in the middle of the rear sight…but, it really isn’t there. The sight is clean. I don’t see any blurb in my vision until I look thru the sight.

    I’ve thought about trying to explain this to my optometrist, but they don’t shoot and most medical people start putting you in the “loony” category as soon as you tell them you’re a shooter.

    Do I have a “hole” in my retina? What’s the problem? Does anyone have any insight (pun intended) here?

    St. Louis, MO

    • Motorman,

      Are you leaving both eyes open when you look through the peephole? That is very important, because when you close the other non-sighting eye, you also tend to close the sighting eye and the peephole gets smaller and very dark. Cover the non-sighting eye but leave it open and see what happens.

      Next — get your eyes checked. I’m almost 74 and I struggle with my eyes all the time.


    • Have your eyes checked for cataracts or floaters. The peep increases depth of focus, so things that your eye would normally not be able to focus on, jump into focus. For example, I am severely nearsighted, so I have little broken strands of vitreous in my eye called floaters. They usually go unnoticed until I am looking up at the sky or if one happens to wander directly into my view. But through the peep sight, I notice them MUCH more. Also, if there is a speck of anything on my glasses, I will see it. Finally, I noticed that if there is a light bulb between me and my target, I will pick up some light distortion through the peep, which is probably a floater or a scratch on my glasses. So I put a cardboard shield one stud away from the light, between it and my shooting table, so the bare bulb is not shining in my direction. Next time I go to the hardware store, I will get one of those clamp-on work lights with a shield to direct the light only onto the target. There are many blog entries and comments about vision issues. You could probably find the answer you are looking for just by using the search box for this blog. Don’t get discouraged. There are many folks on this blog that probably have had the same issues, and we are here to help you.

    • Motorman,

      “I’ve thought about trying to explain this to my optometrist, but they don’t shoot and most medical people start putting you in the “loony” category as soon as you tell them you’re a shooter.”

      You should call them up and tell them you are a Sport Shooter and need an evaluation of your eyes and your sighting system. If they can’t deal with that find another Optometrist! Call local shooting clubs or instructors for leads to COMPETENT eye doctors.

      “Do I have a “hole” in my retina? What’s the problem? Does anyone have any insight (pun intended) here?”

      Not an eye quack but don’t think you have a detached retina. Probably slight case of Cataracts or even just an astigmatism.


  5. Cloud 9,

    Mine could be a prototype. The tube is aluminum as I said, but the rest of it is plastic all the way back to and including the butt.


    • Oh! Yes, the butt stock is plastic with an aluminum buffer tube inside it, but the rest of the “chassis” or “stock from the butt up to the forend is anodized aluminum. I think I interpreted your earlier statement about the wood stock and synthetic stock as a comparison of the whole stock and not just the butt. My bad.

    • I deleted my post before I knew you replied, BB, sorry. For the others, I had said:
      “I think I’m addicted to airguns and this Blog, any advice? I need to be more productive at work”

    • I have a thought, since most guns need to be broken in with a few hundred to 1000 shots before they show their true potential, how much would it pay, if I were to break in new guns for you before you reviewed them? Besides trigger time, would I get benefits? After all, it does not seem fair to judge an airgun from the first few shots after the velocity test. Take my kids’ Embark, for example, which I have been working on, lately. The first several hundred shots at 10 yards produced groups from .75″ to almost 2″. Now, after several hundred more shots and cleaning the barrel, the trigger has smoothed out, and almost everything shoots under .75″ and some pellets shoot much smaller groups. So, I think to be fair, a new rifle should get a break-in period before its official review. What do you think? Help a fellow out?

  6. B.B.

    When you say 2.5mm screw, I assume you mean a 2.5mm hex or allen keye headed screw?
    Even a second stage trigger at 15 oz. would still be under the “legal” limit of min. 500 grams.
    Can it go 90 grams higher?


  7. BB, That should be in the trigger instructions for claritys sake.Let’s see if I have this right: Screw A, 1x rh turn= More holes in ceiling/ lh= less holes in ceiling? I was trying to understand what ‘pressure’ meant in the directions. Thanks. Whats the best platform for long range target shooting, .22? I am thinking about a .177 rifle that can do 12ft/lbs or 16 grn slugs at 100yds.
    The Howler .20 grn hollow point slugs might be a good one in the HM1000X.

    • Rob,

      Accuracy at long range depends on the wind. In light wind I like .22. When the wind picks up, the heavier .25 and .30 caliber pellets have the edge.


  8. B.B.

    I like airguns that allow tuning though I am not decided whether having the adjustment screws hidden or exposed is better. Sometimes out of sight and out of mind will reduce the temptation to mess with things best left alone. 🙂

    I’m sure you know but (for other readers) I’ll second RR’s comment 850-900 fps is typical for a .22 anyway. For reference, my Impact MK2 came from the factory shooting 18.13 JSBs (very well) @ 900fps.

    That being said, my current tune, 18.13 @ 940 fps ES 2.5 SD 1.8 (reg @ 75 barr; 700 mm standard pellet barrel) is consistently shooting sub 1/2″ groups (typically .250- .350 ctc) at 40 yards. The lighting on my range is such that I often see that the pellet is dead stable in flight.

    So the “880 fps” optimum velocity rule is not “cast in stone” but it is a good starting point.

    Airguns like the HM-1000 have a big advantage in that they can be fine tuned to the pellet. Unless RAW has a recommended pellet, I suggest that you chose your favorite (moderately heavy) pellet and tune the rifle to it.

    Think you are going to have fun with this one!


      • Mine likes them very much. Up until this point, they have been all that works. After I adjust the reg some, it might take a shine to some quality bullets.

        • RR
          Wonder what happens when you readjust for your original pellet.

          That would be a bummer if your original pellet is not accurate anymore.

          You know anything is possible. I wouldn’t take the chance.

  9. B.B. and Readership,

    39″ long and 7.4 pounds bare rifle! Different lengths are possible since barrel length and adjustable butt stock do that to O.A.L..

    AirForce gets the furniture for the RAW HM 1000X Chassis System from this supplier:

    Granted the handguard on the linked product is for an AR15 Smoke Pole. You can, however, get some clues on the materials they use for their furniture.
    They make some high quality products.


      • Tom,

        You are on the ground in area and know best.
        I can only go on the advert copy and what Cameron said to Travis during the AGD video. Nice .88 group at 100 with bullets (slugs) shot by Travis.


        • Wow. Less than 1 MOA. Would the .177 version dominate Field Target?

          Speaking of Field Target, is there anyone in NW Pa. area offering F.T. or airgun clubs in general?

          • Roamin Greco,

            Travis said something about .20 group with pellets at 35 yards but i could be wrong about that. I think that was in .22 and in the 100 tunnel.
            I have never been interested in FT much rather shoot 10m for competitions or full up BIATHLON. But Big Bore hunting is what i love the most especially on skis or snowshoes…no bugs!


  10. My .22 HMX, and every one I’ve shot, performs extremely well with the Monster Redesigned and the Hybrid slugs. Some of the H&N slugs shoot very well also. Out of the box the guns come set up perfectly to shoot those projectiles, so I agree with BB – don’t tune the gun just shoot it.

    Mine is by far my favorite 22 pcp. It isn’t a backyard plinker and it’s not a truck gun, but for what it is it is almost perfect. Point of impact never shifts from day to day and it’s always dead on from the first shot.

  11. BB
    Caught your review of the TalonP last year. Bought one from AF. To the day, one year later, bought a Chassis LRT in .25. Awesome rifle. Just wish had a time machine to fast forward through the barrel break-in.

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