BSF S54 Match rifle: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

BSF S54
BSF S54 target rifle.

Part 1

A history of airguns

This report covers:

  • A little more of the BSF Story
  • Today
  • Front sight
  • BINK!
  • Velocity
  • Superpoints for the proof
  • Firing behavior
  • Cocking effort
  • Trigger pull
  • Summary

A little more of the BSF Story

Bayerische Sportwaffen Fabrik (BSF) was established in 1935. They made some airguns before WW II, but after the war is when they really got going. They were located in Erlangen, a town that’s about 15 kilometers from Nuremberg, but today is more like a suburb.

BSF airgun models ranged from youth guns to serious adult guns. Their lowest model was called the Junior that was a plain-Jane youth breakbarrel. Above that the Media came next. It shared a few parts with the Junior like the trigger but it was longer, heavier and more powerful. Think of them as the Diana 23/25. 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


BSF S54 Match rifle: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

BSF S54
BSF S54 target rifle.

A history of airguns

This report covers:

  • BSF
  • The S54
  • Trigger
  • Three variations of the S54
  • Two calibers
  • Hang tag
  • Underlever cocking
  • Loading tap
  • Summary

I’m starting a report on the BSF S54 target rifle today. I reviewed this rifle 4 years ago, but I want to look at it more thoroughly this time.

BSF

Bayerische Sportwaffen Fabrik (Bavarian Sporting Weapons Manufacturer) or BSF, as it was known, operated for several decades, both before and after World War II. They were based in Erlangen, Germany, a suburb of Nuremberg. The guns they made were approximately equivalent in quality to Dianas, though in some respects like power they were ahead for a few years. It was BSF that first broke the 800 f.p.s. barrier with their model S55/S60/S70 breakbarrel. I group those models because they were all the same except for their stocks — kind of like the S54 we are looking at today. 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


Tuning Michael’s Winchester 427: Part 7

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

A history of airguns

This report covers:

  • New breech seal
  • The breech test
  • Second tune with a new piston seal
  • The hand test
  • No relief
  • Rear sight was fooled with
  • Too much air escapes the compression chamber
  • Where we are
  • Summary

This is the report about tuning reader Michael’s Winchester 427, which we know is a Diana 27. It’s a .22 caliber breakbarrel air rifle.

New breech seal

I completed the tune in Part 6 and then started shooting the rifle to burn off the excess oil from the piston seal pre-lube. I expected one or two explosions after the tune, but the rifle never stopped detonating. It was constant. Something was wrong.

The breech test

The rifle acted like it was leaking air at the breech. There is a way to determine whether the breech seal leaks. Put something light, like tissue paper, over the breech and see if it gets blown off by escaping air. I did that and the paper stayed in place when the rifle fired. So the breech seemed to be okay. 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