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


Daisy Number 12 model 29 single shot BB gun: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Daisy model 29
Daisy Number 12 model 29 single shot BB gun.

Part 1
Part 2

A history of airguns

This report covers:

  • Taking the gun apart
  • BB gun spring compressor
  • Help!
  • No air tube
  • What does this mean?
  • BB gun technology
  • What to do?
  • Summary

Today I tear into my Daisy Number 12 model 29 single shot BB gun to see what’s wrong with it. If you recall, I was testing this gun last August when it stopped shooting altogether. I was testing it for velocity when it simply stopped shooting a BB out the barrel, so I removed the single shot tube and extracted bits of what I knew were leather.

Daisy model 29 leather stuff
This stuff came out of the Daisy Number 12 model 29. It’s leather that has rotted and come apart.

When I saw that junk I knew what had happened. The leather piston seal, which in a Daisy BB gun is called a plunger seal, had rotted and was coming apart. It had to be fixed, before the gun could work again. read more


Tuning Michael’s Winchester 427: Part 6

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

A history of airguns

This report covers:

  • Assembling the ball bearing cages
  • Two cages — inner and outer
  • The real sear
  • Trigger assembly
  • Finish the assembly
  • Trigger adjustment
  • Test the rifle
  • Summary

And I’m going to pick it up right where we left off on Friday. A reminder that I am in Las Vegas at the SHOT Show today and will not be able to respond to comments as easily as normal. Let’s get started.

Assembling the ball bearing cages

We have come to the most daunting part of the assembly — assembling the trigger unit. You have to put a swarm of loose parts into the spring tube under tension from both the mainspring and the trigger spring. First, put the lubricated spring guide into the rear of the mainspring. I forgot to do that the first time through and I assembled the rifle without the guide. Got the rifle all buttoned up and said those famous last words, “I hope I never have to do THAT again!” Then my eyes fell on the guide sitting on the table. It was smiling at me, and I’m pretty sure I heard God laugh a little! read more


Tuning Michael’s Winchester 427: Part 5

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

A history of airguns

This report covers:

  • SHOT Show
  • Today and Monday
  • New parts
  • Scragging?
  • Lubricating the mainspring
  • Rust removal
  • Lubrication
  • Putting the piston into the spring tube
  • Pull the trigger!
  • Attach the barrel
  • Break

Many of you have been reading this series in which I tune reader Michael’s Winchester 427 that is actually a Diana 27. This is not an air rifle for beginners to learn on! The mechanism is too complex for first-timers for a number of reasons that should become clear today.

SHOT Show

I have to tell you — this is a very lengthy report. I won’t get it all done today, so Monday I will finish up. And on Monday I will be in Las Vegas at the SHOT Show. I won’t see your comments as frequently as usual while I’m there next week, plus after I walk out of the show every day I have to go back to my room, write the next day’s blog and have it ready to publish by 9 p.m. which is midnight on the east coast where the WordPress server publishes the blog. So please don’t ask me any lengthy questions. I am not going to have dinner with anyone this year, so I can do my work without being whipsawed! read more


Treasure of the pond

by Tom Gaylord

A history of airguns

This is a special day. You will notice that I did not use my pen name today.

I’m showing you the first chapter in my next book. My last book was BB Guns Remembered, which is a collection of short stories I wrote about vintage pictures of boys with BB guns. I make nearly $100 a year from the online sales of that book, which beats the thousands I lost on the R1 book. So, I obviously don’t do this for money. I do it for fun. Have some fun on me this weekend!

boy dog gun

My gosh! I never looked that clean a day in my life! I had to take a bath and get on my best summer clothes for that picture. See those shoes? Never wore them in the summer, except to church. And the hat? Not on your life! It made me look like a girl. read more


Crosman’s Mark I Target pistol: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Crosman Mark I
Crosman Mark I target pistol.

Part 1

A history of airguns

This report covers:

  • Loading the CO2 cartridge
  • O-ring material
  • Velocity
  • RWS Hobby
  • Air Arms Falcons
  • Crosman Premiers
  • Discussion
  • Shot count
  • Trigger pull
  • Summary

Today we look at the power of my Crosman Mark I Target pistol. This will be interesting because I don’t remember ever doing it. I probably did, but without a report to read I can’t remember.

Loading the CO2 cartridge

Usually on a CO2 pistol that stores the 12-gram CO2 cartridge in the grip, one of the grip panels comes off to remove and install the cartridge — the left one, more often than not. Not so with this pistol. Instead there is a large knurled cap at the bottom of the grip that is removed, and the cartridge inside slides out. If there is still significant gas in the gun, the pressure will force the o-ring in the cap to seal the cap tight and it may not rotate. Don’t use pliers to force it! Shoot the gun until the gas is gone or almost gone. read more