Tuning BB’s Diana 27: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

A history of airguns

This report covers:

  • Teardown
  • 25 years?
  • Krytox!
  • Petroleum archaeology!
  • Grease to oil
  • Spring is fully scragged
  • Grease formed plugs and solidified
  • Start cleaning
  • Removing the barrel
  • Surprise!
  • Piston out
  • And rust!
  • Diana peened the blind pin in the piston head!
  • Cleaning done, time for the Krytox
  • Lubed the mainspring
  • Assembly
  • The rest of the parts go in
  • Finishing assembly
  • The verdict
  • Did I do it wrong?
  • What should I do now?
  • Don’tcha wanna know how it works?
  • RWS Superpoint
  • Air Arms Falcon
  • Summary

Today is the day we learn whether Krytox is the miracle lubricant that both fixes and quiets spring-piston airguns. I have been hounded by people for more than a decade to try this stuff, and I had dug my heels in real deep, but then it dawned on me that Gene from Pyramyd Air had been after me for an equally long time to try Almagard 3752 — the grease that turned out to be Tune in a Tube. We all know how that went!

I promised to become the number one Krytox cheerleader if the stuff really works as advertised — by some airgunners, not by Krytox, themselves. But, I will also be only too happy to poke a hole in the Krytox balloon if it turns out we have been hoodwinked. read more


Tuning BB’s Diana 27: Part1

by Tom Gaylord
Writing as B.B. Pelletier

A history of airguns

This report covers:

  • Bias
  • The deal
  • Krytox
  • Diana peep sight
  • Cheap peep
  • Same idea — more elegant
  • The best
  • Ebay
  • BIG teaching point
  • On with the Diana peep
  • So, what?
  • My 27
  • RWS Superpoints
  • Air Arms Falcons
  • Discussion
  • Summary
  • Sad news

Today’s report isn’t quite what the title says. I am going to tune my Hy Score 807/Diana 27 for you, because, after the success I had with Michael’s rifle, I felt it was time to strike while the iron is hot. But reader comments entered the picture as I was extolling the virtues of Tune in a Tube. One reader said he had his best luck with a lubrication product called Krytox, and then several more readers piled on, saying similar things. So, the subtitle of this report could be “The Great Krytox Experiment, or Krytox versus Tune in a Tube.” Because that’s what I plan to do — tune my Diana 27/Hy Score 807 with Krytox to compare it to a Tune in a Tube tune. read more


DIY Rifle Stock – Part 5

by Tom Gaylord
Writing as B.B. Pelletier

Today’s report is Part 5 of reader Vana’s excellent report on stock making. This one was delayed because of the SHOT Show, followed by my need to catch up on reports followed by my forgetting I had it — and Part 6 that’s still to come.

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

And now, over to you, Hank.

Part 1
Part 2
Part 3
Part 4

Slavia 618
This is my original 55 year old Slavia 618 in its new “firewood” stock. I made this one in a “camo” style, using cherry and maple blocks in a random arrangement of the pieces.

This report covers:

  • Preparing for finishing
  • Cabinet Scrapers (aka Card Scrapers)
  • Sandpaper and sanding
  • Steel wool
  • Preparing the surface
  • Smoothing the wood
  • Fancy it up
  • Checkering
  • Stippling
  • Carving
  • Accent pieces
  • Accessories
  • Summary

Preparing for finishing

In this part I will discuss the hand-tools that I use to finish the stock and how I use them. The stock, having been shaped with rasps, files and coarse sandpaper, will have scratches, bumps and flats that need to be smoothed out before I can even think about applying a finish. Electric sanders are useful time savers but you can easily get by without them. In truth, I like sanding, and find the quiet time I spend working on the wood relaxing. read more


Hatsan SpeedFire Vortex multi-shot breakbarrel air rifle: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

Hatsan Speedfire
Hatsan SpeedFire Vortex breakbarrel repeater.

This report covers:

  • I like the design
  • Velocity and power
  • Easy to load
  • Air Arms Falcons
  • Discussion
  • H&N Baracudas
  • Feeding
  • Summary

Today we learn about the velocity of the new Hatsan SpeedFire Vortex multi-shot rifle. As you remember from Part 1, this is a repeating breakbarrel spring-piston air rifle. The one I’m testing is a .22, but there is also a .177 available.

I like the design

For starters, I like the design of the SpeedFire’s magazine. It doesn’t sit out naked, nor does it stop you from closing the barrel after it is empty. I’m referring to many bolt-action PCP repeaters that cannot close their bolts on an empty magazine. That does prevent you from dry-firing but also forces you to remove the magazine after it is empty. I prefer to be in control of the airgun at all times. read more


Tuning Michael’s Winchester 427: Part 9

by Tom Gaylord
Writing as B.B. Pelletier

Diana 27
Michael’s Winchester 427 is a Diana model 27 by another name. The rifle pictured is my Hy Score 807/Diana 27.

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8

A history of airguns

This report covers:

  • Historical baseline data
  • Preparing the rifle
  • Michael’s 427 shooting RWS Superpoints
  • Air Arms Falcons
  • RWS Hobby
  • Discussion
  • Cocking effort
  • Trigger
  • Michael’s barrel is choked
  • What have I learned?
  • A hidden gem
  • Summary

Today we look at the velocity of Michael’s Winchester 427/Diana 27. This will be the end of this report.

I used to think that Tune in a Tube (TIAT) grease increases velocity but now I know from testing that it decreases velocity. Yes, it is a type of grease, but it is so tacky that it slows things down just a little. In rifles of medium power (.22-caliber rifles shooting 750-900 f.p.s.) it can drop the velocity by as much as 40 f.p.s. I haven’t really tested it in a Diana 27 before, so this test will be an eye-opener. read more


Tuning Michael’s Winchester 427: Part 8

by Tom Gaylord
Writing as B.B. Pelletier

Diana 27
Michael’s Winchester 427 is a Diana model 27 by another name. The rifle pictured is my Hy Score 807/Diana 27.

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7

A history of airguns

This report covers:

  • Recap
  • Tune in a Tube
  • But the rear sight…
  • The rifle is fixed!
  • Breech seal shim
  • Pivot bolt locking screw
  • Accuracy
  • Air Arms Falcons
  • RWS Hobby
  • Then I read…
  • Michael’s rifle is accurate
  • The big surprise!
  • Next

Today was a long time coming — much longer than I anticipated. But I learned a lot about problems with the Diana 27 that I have never encountered before, and I now believe I can tune one with ease.

Recap

Just so you remember, I am tuning reader Michael’s Winchester 427 that is a Diana 27 by another name. It looked good on the outside, apart from missing things like the rubber button on the butt and a locking screw for the pivot bolt. The rear sight was a kluge of backwoods “repairs”, but that didn’t impress me until the very end of the job. In fact, I will tell you now that I should have started there first. It was the main source of the rifle’s issues. read more


Hatsan Speedfire Vortex multi-shot breakbarrel air rifle: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

Hatsan Speedfire
Hatsan Speedfire Vortex breakbarrel repeater.

This report covers:

  • Breakbarrel repeaters
  • So, what’s new?
  • Outside the rifle
  • Pellet feed
  • Trigger
  • Power
  • Cocking effort
  • Tests
  • Summary

Once more I’ll remind you that I am suspending the historical reports for awhile to catch up on several things I have been putting off. There are also many new airguns I want to test. Some tests of complex guns like the Air Venturi Seneca Aspen PCP have taken me many more than the usual three reports, and this has led to the current situation. The history section will be back soon, I promise.

Breakbarrel repeaters

Today I start looking at the Hatsan Speedfire Vortex multi-shot rifle. It’s a breakbarrel spring-piston gun that uses a gas spring (this one is a contained unit that Hatsan properly calls a gas piston) for the powerplant. It comes in both .177 (12 shots) and .22 (10 shots), and I am testing the .22. read more