Do pressure vessels become unsafe over time?

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • Do pressure vessels become unsafe over time?
  • Operating pressure
  • Water leading to rust
  • Oxygen!
  • Danger through work-hardening
  • Last word

Today we have a safety issue to examine. Here is the question I got last week that spawned this report.

“Wasn’t sure how to reach you so using this venue. Was wondering about safety issue on pcps with regard to repeated pressurization over the years.Most pcps are newer and certainly built with margin of safety, but is it possible as these age and perhaps are handed down that they (the pressure vessel) can become unsafe? Read somewhere repeated pressurization can lead to eventual metal fatigue (in relation to high pressure vessels of non air rifle type). Thinking of future owners down the road. Thanks for all you do for all us airgun fans, read blog everyday.”

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Firearm pellet adaptor: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • On a dare
  • The adaptor
  • Priming
  • Is it dangerous?
  • Loading the pellet
  • Discharge sound
  • Cost
  • Legality
  • Conclusions

I love it when I’m wrong! I try to be correct in my reporting, but sometimes I hit the wall and splatter all over the place. Today might be the start of one such time. I am reporting on an adaptor I bought to shoot pellets in a .223 Remington centerfire rifle, using the power of number 209 shotgun primers.

On a dare

My late wife, Edith, used to keep me straight by periodically challenging me. Whenever I said something that didn’t sound quite right, she invited me to put my money where my mouth iwa. She learned very quickly that I knew what I was talking about in the field of guns most of the time, but every once in awhile I was off the track. She learned to spot those times and she would call me on them.

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The Modoc big bore from Air Ordnance: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

MODOC
The Modoc from Air Ordnance is a new single shot big bore in 9mm.

This report covers:

  • What is the Modoc?
  • The difference between 9mm and .357 caliber
  • Aluminum barrel!
  • Long barrel
  • Air cartridges
  • 4500 psi
  • The gun
  • Open sights
  • Weaver bases
  • Air cartridges
  • Open sights
  • Summary

Today we take a look at an unusual air rifle — the Modoc from Air Ordnance.

This is the first time I have written about an airgun from Air Ordnance in this blog, but it isn’t the first time I have tested one. Several years ago I tested the SMG 22 belt-fed carbine they produce and wrote it up in a feature article in Shotgun News. Indeed one of the main photos on my website, The Godfather of Airguns, shows me holding that gun. My buddy, Otho, was so impressed when he shot it that he considered buying one.

What is the Modoc?

The Modoc is a 9mm big bore single shot air rifle, built on what looks like a Remington rolling block action. It isn’t, of course, but the action is steel. It uses an air cartridge instead of a reservoir inside the gun. There are many things about this airgun that are different, and we will consider them today. The first is why Air Ordnance decided to market the Modoc as 9mm instead of .357 caliber, when every other big bore maker on the market has switched over.

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