Revitalizing a Benjamin 392: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Beeman R9

Part 1

Benjamin 392
Benjamin 392 multi-pump pneumatic.

A history of airguns

This report covers:

  • The rebuild
  • The test
  • Test 1
  • Analysis of test 1
  • Test 2
  • Analysis of test 2
  • Test 3
  • H&N Baracuda Match
  • JSB Exact Jumbo Heavy
  • Analysis of test 3
  • Next

Today we look at the Benjamin 392 that has been resealed. The first report was done on the gun as it came from the pawn shop. All I did was oil the pump head with ATF Sealant and then test the gun. It’s been a long time since Part 1, so you may want to read it again. In the last test I said this was the fastest 392 I have ever tested.

The rifle responded well to ATF Sealant. I will run those number with today’s test figures for comparison.

The rebuild

I sent the gun to reader Jeff Cloud for a rebuild. He is the guy who rebuilt my Sheridan Blue Streak a couple years ago. read more


Chinese B3 underlever: Part 6

by Tom Gaylord
Writing as B.B. Pelletier

B3
The B3 underlever from China.

Part 1
Part 2
Part 3
Part 4
Part 5

A history of airguns

This report covers:

  • Pre-work baseline
  • RWS Hobby
  • Harsh firing cycle
  • Rifle is breaking in
  • Air Arms Falcon
  • Sig Match Ballistic Alloy
  • RWS Hobby again
  • Discussion
  • Cocking effort
  • Trigger pull
  • Summary

Today I will test the velocity of the B3 underlever that we cleaned and lubed on Friday. This will be a fantastic learning lesson for all airgunners, because the results are most informative!

Pre-work baseline

If you have been following this report you know I discovered in Part 2 that the rifle wasn’t performing to expectations. In Part 3 I replaced the breech seal and tested the velocity. That gave us a baseline we can use today for a before and after comparison. Let me get to the tests right now.

RWS Hobby

The first pellet to be tested was the RWS Hobby. In Part 3 Hobbys gave an average 617 f.p.s. with a 24 f.p.s. spread. read more


Umarex Strike Point multi-pump pistol: Part 2

by Tom Gaylord
Writing as B.B. Pelletier
Strike Point
Umarex Strike Point multi-pump pistol.

Part 1

This report covers:

  • A surprise is coming
  • Ugly step-sister
  • Oil a multi-pump
  • Test 1. Velocity per pump
  • Learned a lot!
  • Curiosity
  • Pump force
  • Test 2.
  • Evaluation
  • Test 3.
  • Test 4.
  • Evaluation
  • Trigger pull
  • Summary
  • CMP Coach’s Course

A surprise is coming

It’s very fitting that I announce today that I have a surprise coming for you readers. The surprise is a multi-pump, as well, and it will be presented in the historical section. I have some other reports to get through before I can get to it, but this is a surprise worth waiting for!

Ugly step-sister

You readers were really hard on the Umarex Strike Point multi-pump pistol when I introduced it in Part 1. You made fun of its looks, the trigger, the weight and everything else. Today we find out about the velocity.

Oil a multi-pump

Multi-pump pneumatics need to be oiled to obtain their best performance. The Strike Point I’m testing came to me well-oiled, but I added some Crosman Pellgunoil to that. Let me show you how a multi-pump should look. read more


Beeman R9 with Vortek center-latching air piston: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

  • Today’s fill
  • JSB Exact
  • Predator Polymag
  • H&N Field Target Trophy
  • H&N Baracuda
  • Crosman Premiers
  • Benjamin Cylindricals
  • Cocking effort
  • Trigger pull
  • Firing behavior
  • Summary

Today is velocity day for the Beeman R9 with the Vortek center-latching gas piston that I’m calling the center latching unit (CLU). Bear in mind as you read today’s test, that this unit allows the owner to adjust the pressure inside the gas piston — raising or lowering the velocity and cocking effort. So, this is the first of several tests of the unit.

Today’s fill

I filled the CLU to 675 psi when I installed it. So that’s how it’s set up today. I will test it with 6 different .20 caliber pellets — one more than Pyramyd Air carries, if you don’t count the felt Beeman cleaning pellets. Let’s get started. read more


Gamo’s Urban precharged air rifle: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

Gamo Urban
Gamo Urban.

This report covers:

  • Fill probe
  • Pellets
  • Shot count
  • Air Arms Diabolo Field
  • H&N Baracuda Match with 5.51mm heads
  • Evaluation
  • Trigger pull
  • Summary

Today we look at the velocity of the .22 caliber Gamo Urban. And the first string will be an interesting test, because I know the Urban is a BSA design. BSA PCPs do not use their air the same as other precharged air rifles. The Urban fills to 232 bar, which is 3365 psi. Normally that would present a challenge to anyone wanting to use a hand pump, because pumping to that pressure level is difficult for most adults. But testing done by Tyler Patner (watch his video on the Urban webpage) confirmed what I suspected from the start — the BSA-based powerplant in the Urban doesn’t use the pressure above 3000 psi efficiently. It only becomes smooth when the pressure drops below 3,000 psi — the same as the BSA Hornet I used to own. Tyler found the best string of shots was between 2900 psi and 1500 psi. If I find the test rifle performs similarly I will constrain all my tests to that lower maximum pressure. It won’t make much difference at 25 yards, but it will at 50. read more


Chinese B3 underlever: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

B3
The B3 underlever from China.

Part 1

A history of airguns

  • Condition
  • Velocity test
  • Hobbys
  • What would you do?
  • Seal crumbles
  • Beartrap!
  • Safety first
  • Next time

Here we go! Today is the day we find out the health of that rusty old B3 underlever I found in a local pawn shop several weeks ago.

Condition

I’ll start with a description of the condition of the rifle. It’s rusty all over and looks like every Chinese B3 I ever saw. When the rifle is cocked and the sliding compression chamber is pulled back, you can see the breech seal. On this rifle, it looks bad, actually destroyed. So the velocity testing that we’re doing today will be very interesting.

B3 breech seal
The breech seal is toast!

B3-1 breech seal
This is what a B3 breech seal should look like. read more


Crosman 2400KT CO2 Air Rifle — Part 14

by Tom Gaylord
Writing as B.B. Pelletier

This is Part 14 of the Hiveseeker guest blog on the Crosman 2400KT. Today is titled Modding the Crosman 2400 family — Primer 3.

This is the most popular guest blog series we have ever published. Hiveseeker says it is the last in the series, but I think it might not be. You readers will help him decide.

If you’d like to write a guest post for this blog, please email me. Now, over to you, Hiveseeker.

Crosman 2400KT CO2 Air Rifle – Part 14
Modding the Crosman 2400 family — Primer 3
By Hiveseeker

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Part 9
Part 10
Part 11
Part 12
Part 13

2400KT cover photo
The 2400KT CO2 Air Rifle that I modded for this report is only available directly from the Crosman Custom Shop. It is shown here disassembled with a mix of stock and modded parts. For scale, the background grid on all photos is one inch square. read more