Methods of power adjustment — pneumatics: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

  • Pneumatics
  • Single stroke pneumatics
  • Multi-pump pneumatics
  • Precharged pneumatics
  • Short history of PCPs
  • Barrel length
  • Projectile weight
  • Barrel length and projectile weight together
  • Airflow
  • Springs
  • Valve stem travel
  • Valve angle and contact area
  • What’s the ideal?

This is the second part of a report on the methods of adjusting power in an airgun. Reader Riki asked for the report, and a number of other readers seconded his request. I wasn’t planning to also delve into CO2 guns, but several readers asked for that, and I will get to that in a different report. Today we look at pneumatics.

Pneumatics

A pneumatic airgun is one that uses compressed air to power the pellet. While a spring gun also uses compressed air, it is the method of compression that sets it apart from the pneumatics. In spring guns, a piston moves to compress the air at the instant of firing, where in pneumatics, the air is stored inside in a compressed state, waiting for the trigger to release some or all of it.

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2017 SHOT Show: Part 5

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 4

  • TexanSS
  • Silenced?
  • New BKL mount
  • Gamo
  • Leapers
  • New 3-12X32 Bugbuster
  • T4 Tactical Compact Prismatic scope
  • The incredible shrinking dot sight!
  • Defense LED Light
  • Steel scope rings
  • More from Air Venturi

TexanSS

Here we go, starting at the AirForce booth, where the big news was the TexanSS, That’s right, kids, AirForce is giving us a silenced big bore!

Silenced?

Can you silence a big bore airgun? Maybe, but not in a package that’s small enough to hunt with. What you can do is reduce the report to the point that it becomes more manageable in a built-up area, and that is what has been done.

TexanSS
AirForce representative, Keeva Segal, holds the new Texan SS.

The TexanSS is an entirely new air rifle. The first offering will be in .45 caliber, but other calibers are sure to follow. The barrel length is 24.75-inches to fit inside the shroud. A shorter barrel means less velocity, and the rifle develops up to 400 foot-pounds, compared to the 500 foot-pounds of the unsilenced Texan that carries the title, “The world’s most powerful production air rifle.” You trade almost a foot of barrel for the quieter operation and still get more power than many big bores can offer.

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2017 SHOT Show: Part 4

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3

  • Crosman
  • Benjamin Wildfire
  • Marauder Field & Target
  • Adjustable regulator?
  • 1875 Remington revolver
  • Best for last
  • Whew!

Crosman

Let’s continue with our look at the new airguns and things at the 2017 SHOT Show. We will begin with Crosman. While I was gawking at the guns, Jesse Caster from Crosman came up and showed me everything you are about to see.

Benjamin Wildfire

The first thing I did was examine the new Benjamin Wildfire rifle. Based on the famous Crosman 1077 that is itself a copy of Ruger’s iconic 10/22 rifle, the Wildfire feels just as light as the CO2-powered rifle. I was hoping it would.

Benjamin Wildfire
New Benjamin Wildfire looks very similar to a 1077. The biggest difference is the longer reservoir.

That tells me that the trigger will feel the same. The 1077 trigger both cocks and releases the striker and advanced the 12-shot circular magazine to the next chamber. That’s why I keep insisting it’s a double-action revolver. The feel of the trigger is exactly the same as that of a double action revolver.

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2017 SHOT Show: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2

  • Air Venturi
  • Lil Duke
  • New Air Bolts
  • Hatsan
  • Semiautomatics
  • Big Bore Carnivore
  • Sun Optics compressor
  • The year of the airgun

Air Venturi

This was the first actual day of the SHOT Show, and the crowd was excited! I stopped at the Air Venturi booth first, so let’s see what’s there.

Lil Duke

First up was the Lil’ Duke BB gun. As you can see, it’s styled after the model 92 Winchester John Wayne carried in a number of his most famous movies, including True Grit. This is the one he fills his hand with.

Lil' Duke
The Lil Duke is bound to become a favorite.

The John Wayne airguns have been quite successful for Air Venturi. They had a second booth upstairs this year where they showed a number of their other John Wayne handguns, including a 1911 that Wayne probably carried in the Sands of Iwo Jima!

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2017 SHOT Show: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

  • What I saw at Sig
  • What I didn’t see
  • Bucket list
  • Industry Day at the Range
  • Gauntlet
  • Havox
  • Gamo Swarm Maxim
  • Coyote Urban
  • There is more

Inn this report I will cover airguns I saw at Sig Range Day on Sunday, Jan. 15 and at Media Day at the Range on Monday, Jan. 16.

What I saw at Sig

Sig has been breaking into airguns over the past several years. This year they brought out the Max Michel 1911 that I tested for you back in November and December, plus they have now added the Sig P320 ASP pellet pistol. The 320 is unique in 2 ways. First, it has a 30-shot belt-fed magazine, so there are lots of shots on board. We haven’t seen a pistol with a belt-fed mag since Anics walked off the scene, years ago. This one is very slim, too.

The other nice feature is the trigger pull. Though it is a long pull, it is 2-stage and incredibly light. Yours truly was able to nail targets with this gun at respectable distances.

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Wax on — wax off!

by Tom Gaylord
Writing as B.B. Pelletier

A history of airguns

This report covers:

  • Some basic truths
  • What am I saying?
  • What many do wrong
  • Ready, fire, aim!
  • Back to airgunners
  • Use the sights!
  • The end

Homework assignment. You need to watch the movie, “Karate Kid.” The moral of the movie is to slow down, concentrate and focus power! At least that’s what Mr. Miyagi tells Daniel-san.

Another phrase from WWII is, “Straighten up and fly right.” It pretty much means the same thing.

I almost titled this report, “Why I shoot muzzle loaders,” but I thought that would turn off the very people I was reaching out to today.

Some basic truths

1. When shooting lead bullets in a big borte airgun, always size the bullet at least one-thousandth of an inch larger than the bore. This is the principal reason 9mm big bore airguns are not accurate when shot with 9mm bullets (0.356-inches) but tighten right up when shot with 0.357-inch and even 0.358-inch bullets.

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Methods of power adjustment — springers: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • More power!
  • Example
  • Stronger mainspring?
  • Piston stroke
  • Increase the piston length
  • Dual power is possible through piston stroke
  • Larger piston?
  • Cost
  • Transfer port size
  • Port location
  • Piston weight
  • What can be done with this knowledge?

Today’s topic was suggested last week by reader Riki from India. A lot of other readers jumped on the bandwagon when he asked for it, so I agreed to write a series of reports. The question is — how do airgun manufacturers control the power/velocity output of the guns they make?

More power!

An American airgunner who is new to the hobby will look at this in a different way. He will wonder how airgun manufacturers get the highest possible velocity/most power from an airgun. He won’t appreciate that in nearly every country in the world other than the United States the governments have limited the power of airguns. And there is no common way they limit it. In the United Kingdom they limit the output by energy, allowing no more than 12 foot-pounds for air rifles and 6 foot-pounds for air pistols, I believe. They aren’t concerned with velocity, except as it produces energy. This is a thoughtful regulation that forces airgunners in those countries to learn basic ballistics. It also forces manufacturers to test their airguns with almost every pellet to be sure they are not exceeding those limits.

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