They have the wrong twist rate!: Part 2

usby Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

  • Been awhile
  • New airgunners
  • A better way
  • Doing what works
  • The point
  • Sharpening straight razors

Been awhile

Part 1 of this report was written way back in the beginning of February. I think the reason it’s taken me so long to get back to it is I titled it wrong. I will discuss that as we go, but first let me define who “they” are. In the words of comedian, Red Green, “They” are everybody who is not us. Now that that’s clear we can continue.

Part 1 was a treatise on twist rates and how they affect accuracy. As many of you are aware, I use this blog to school both new airgunners and also airgun manufacturers — who are often as ignorant of the facts as new airgunners, but cannot or will not admit it. No engineer who has just been hired by an airgun company is going to admit there is something he doesn’t know about guns! Heaven forbid! And neither is any CEO or owner of a company, because in their minds they are in a position of authority and should therefore know!

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Revisiting the BSA GRT Lightning XL SE: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This is Part 2 of a guest blog from reader Dennis. He sent this to me a month ago, but I got so busy that I forgot about it until he reminded me last week.

This is about the air rifle he really enjoys. If you’d like to write a guest post for this blog, please email me. Now over to you, Dennis.

Revisiting the BSA GRT Lightning XL SE: Part 2

By Dennis

BSA GRT Lightning
BSA GRT Lightning XL SE.

This report covers:

  • Introduction
  • Mea culpa
  • Process modifications
  • Groups at 20, 30 and 40 yards
  • Trajectory
  • Conclusion

Introduction

In Part 1 I reviewed the BSA GRT Lightning LX SE (.22 caliber), discussed several issues and showed results of several groups shot at 15 yards. I was encouraged to extend the range beyond 15 yards and report back the results. Thus this Part 2.
If you have not yet read Part 1, you can find it via the link above. Feel free to check it out now. I’ll wait here for you.

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A million questions

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • Lots of questions
  • Down to the basics
  • Shape and balance
  • Accuracy
  • What about droop?
  • Reliability
  • Which does BB enjoy the most?
  • Who makes what?
  • BB’s evaluation
  • It takes time

I get a lot of questions on other parts of the blog. Sometimes the people asking them seem frustrated by all the things they don’t know. Last week I received this comment from reader Winterz.

“Yes, I am the person who uses obscure threads to ask you questions like the dual collaborative piston breakbarrel air rifle. I also wrote you about the Forge review.

I don’t know where to ask this, and it might be worthy of a writing topic, but of the springer varieties – breakbarrel – underlever — sidelever…. which style do you most enjoy shooting? Which is the most reliable?

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Umarex Forge combo: Part 4

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3

Forge
Umarex Forge.

This report covers:

  • Mounting the scope
  • Sight in
  • The test
  • Poor scope
  • JSB Exact RS
  • Falcon pellets
  • H&N Hammer pellets
  • Don’t care for the flex
  • Evaluation so far — world class!
  • Next

Today I mount the scope that came with the Umarex Forge and I’ll step back to 25 yards to test the accuracy. Part 3 was a blessing because I found two good pellets and I also learned the best way to hold the rifle That sped up today’s preparation time a lot.

Mounting the scope

Mounting the scope was easy. The rings have two screws per cap, so there is no need to tighten them in any pattern and the base is a Weaver that fits the Forge’s Picatinny rail well. Since I knew the Forge doesn’t recoil too much, I also knew the mounting screws only needed to be snug.

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Gamo Swarm Maxxim: Part 4

by Tom Gaylord
Writing as B.B. Pelletier

Gamo Swarm Maxim
Gamo Swarm Maxxim repeating breakbarrel air rifle.

Part 1
Part 2
Part 3

This report covers:

  • The issues
  • Things I like
  • Recoil Reducing Rail
  • The scope
  • Sight in
  • First group
  • Second group
  • Third group
  • The best hold
  • Evaluation and summary
  • 2017 Texas Airgun Show
  • Pyramyd Air Cup

Big day, today. We learn whether the .177 Gamo Swarm Maxxim multi-shot rifle I’m testing is accurate, or not. You may recall in the last test that the scope was the big issue. The one that comes with the rifle isn’t very clear and I attributed at least half the group size in the last test to that.

The issues

There are two issues to examine today. This first is that scope I just mentioned. The second is what kind of hold the Swarm likes. Several owners have said their Swarms like to be held firm — not with the artillery hold. A couple say it doesn’t seem to matter which hold you use. I will try holding the rifle firmly today and we will see how that affects things.

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Umarex Forge combo: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Forge
Umarex Forge.

Part 1

This report covers:

  • Crosman Premier 7.9-grain
  • Baracuda Match with 4.50mm heads
  • Evaluation so far
  • Air Arms Falcons
  • Gamo Raptor
  • Cocking effort
  • Trigger pull
  • Barrel pivot
  • Trigger
  • Still good

Lots of interest in the Forge from Umarex. Many of you like the styling, as do I. Today we discover just how powerful it is. It says 1250 f.p.s. on the box, but the Pyramyd Air website says 1050 f.p.s. We are going to discover which is right and how the Forge performs today.

Crosman Premier 7.9-grain

I started with the Crosman Premier 7.9-grain pellet. The first shot out of the barrel went 1236 f.p.s., but it was obviously an explosive detonation. Shot number 2 went out at 880 f.p.s. Already the rifle had settled down to normal.

I think some gun companies see these artificially high velocities like the first shot and rate their guns there, without realizing that’s just an anomaly of the break-in. I think they believe such velocity will help sell the gun, and to the uninitiated, it no doubt will. But it is a complete turnoff to the growing crowd of educated airgunners.

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Gamo Swarm Maxxim: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Gamo Swarm Maxim
Gamo Swarm Maxxim repeating breakbarrel air rifle.

Part 1
Part 2

This report covers:

  • The scope
  • Pellet length?
  • Accuracy
  • What went right?
  • What remains?
  • Targets

Today I start testing the accuracy of the Gamo Swarm Maxxim multi-shot rifle. I decided to go straight to 25 yards, as that is the distance at which they say their scope is parallax adjusted.

The scope

The scope comes with the mount installed and all you need to do is attach it to the rifle. I found it very quick and easy to mount.

Gamo Maxxim scope base
The scope is installed in the rings when you get it, and the mount just has to be clamped on the rifle. Easy! The stop pin (right) slips into a hole on the Swarm base.

You absolutely cannot see the repeating mechanism in the scope. The image is clear. However, with a dot sight mounted at the same height the mechanism is clearly visible.

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