The Diana 27: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Diana 27
My .22 caliber Diana 27 is actually a Hy Score 807.

Part 1
Part 2

A history of airguns

This report covers:

  • The test
  • Eye report
  • RWS Superdomes
  • Some questions arise
  • RWS Superpoints
  • The artillery hold
  • Summary
  • MP40
  • Second time was the trick

Before I begin, someone asked about Rich Shar. He’s the guy who smoothes the biggest spring guns like the big Gamos and Hatsans. Rich tells me he has not been working on guns for awhile, but he does have a project in the works. He promises to tell me more about it. Now, on to today’s report.

I have decided to take my Diana 27 apart and clean out the old grease, then relubricate it with Almagard 3752 grease, to see what difference it might make. But not today. Today will be a traditional Part 3 accuracy test.

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Umarex Legends MP40 BB Submachinegun: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

MP40
Umarex Legends MP40 BB submachinegun.

Part 1
Part 2

This report covers:

  • Other interests
  • Hornady Black Diamond BBs
  • Semiauto?
  • Umarex Steel BBs
  • Full auto
  • Back to Hornadys
  • How many BBs?
  • Shot count
  • Summary

Today is accuracy day for the new Umarex Legends MP40 BB Submachinegun. I’ve read reviews that say it is surprisingly accurate, so I was hopeful.

Other interests

Besides velocity, you readers had several other things you wanted me to try. I tried a few and will also report those results. Let’s go!

Hornady Black Diamond BBs

First up were Hornady Black Diamond BBs. I loaded just 10 into the magazine, because I wanted to shoot a 10-shot group. The MP40 stops shooting after the last BB is fired, so there is no risk of dry-firing and wasting CO2. The gun already had two mostly fresh cartridges in the mag from the end of the last test, so I went with those until they were exhausted.

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Umarex Legends MP40 BB Submachinegun: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

MP40
Umarex Legends MP40 BB submachinegun.

Part 1

This report covers:

  • CO2 effect
  • Installing CO2
  • Loading
  • Umarex steel BBs
  • Fire control
  • The sensation
  • Daisy BBs
  • Hornady Black Diamond BBs
  • Shot count
  • Hornady Black Diamonds — again
  • Bottom line

Today we look at the velocity of the new Umarex Legends MP40 BB Submachinegun. Since it has a semiautomatic mode, this will be easier than expected. However, there are special considerations for a gun like this.

CO2 effect

Most of you know that CO2 chills the gun as it is fired. And CO2 loses pressure as the temperature drops. Will that affect the velocity of this full-auto airgun? I plan to test for it. My test will show the velocity you can expect from the gun at its fastest and also what will happen as the shots happen faster and the temperature falls. There are unlimited ways of doing this, and I have selected one.

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