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B50 Power Screw Mod

December 28 2016 at 5:51 PM
Skip in WV  (Login SkipinWV)
YF12

Has anyone done the mod where you cut a slot in the power adjust screw. How well it it work?

 
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knt
(Login Rescue912)
YF

I replaced mine ...

December 28 2016, 6:19 PM 

... with a grade 8 allen set screw. I turned the end flat on the lathe first.

With a spring change and the adjuster I tuned for a 1500PSI fill and get a bunch of shots at 12FPE.

Very tame, quiet and accurate at that power level.

 
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Skip in WV
(Login SkipinWV)
YF12

Good idea. Do you remember the screw size?

December 28 2016, 6:57 PM 

I shoot at 20ft lb level so I think I'll leave everything else as is.

 
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knt
(Login Rescue912)
YF

I don't remember the size ...

December 28 2016, 7:34 PM 

... it was probably almost 2 years ago I did all the work on it.

 
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Skip in WV
(Login SkipinWV)
YF12

Ok. Thanks.

December 28 2016, 7:38 PM 


 
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gubb33ps
(Login gubb33ps)
YF

Maybe I'm simple minded...

December 28 2016, 10:24 PM 

I just took the safety off (careful not to lose the little spring loaded steel ball for the detent).

Disassembled enough to get the striker out.

Took out the issue stroke screw.

Slotted the back end with a Dremel cut-off wheel.

Put the now slotted screw back in (slot to the rear).

Mad a skinny screwdriver to fit through the threaded hole that holds the safety on.

Reassembled.

Did all my tuning with the safety off the rifle.

Once I got where I wanted to be, put the safety back on.



Liked the rifles so much, did it twice (.22/.177):

photo c7769df8-2dbb-46d6-9d0e-ec32fe9e0e10.jpg


    
This message has been edited by gubb33ps on Dec 28, 2016 10:29 PM


 
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knt
(Login Rescue912)
YF

Real lookers !

December 29 2016, 9:01 AM 

Can't argue with results. I had mine apart for debur & polish so while fluffing & buffing I dropped in the allen head screw.

Your 51 with the rosewood grip & cap is dead sexy...

 
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john
(Login JCarl)
YF12

I agree - great looking rifles!

December 29 2016, 9:04 AM 

Nice to se the stocks side by side. Good lookers and I'm sure good shooters you have there.

Enjoy!

~GOD BLESS~

john

 
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gubb33ps
(Login gubb33ps)
YF

Bought the .22 51 used from...

December 29 2016, 7:23 PM 

..a member with a lot more stock remodeling skills that I have. It, and the stock finish, have held up very well over the years I've owned it. The .177 50 is newer (one of the last FD airguns had) and the stock is pretty much as-issued.

These are not lite-weights, and pretty much nothing short of some drastic major replacement parts are going to turn metal-and-wood rifles into lite-weights (and I have to say, the air tube is much thicker than most rifles produced today).

Because they are never going to be run-way-model-light, may was well bolt up a decent size/weight scope and let 'em be "fat".

 
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john
(Login JCarl)
YF12

Thanks for that write up

December 30 2016, 12:24 PM 

I enjoyed reading about the rifles and your aquisition of them. I am in the process of deciding on a BAM50 in .177 now and will know soon as to which way to go.

Have a safe and wonderful weekend and NEW YEAR!

~GOD BLESS~

john


 
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Skip in WV
(Login SkipinWV)
YF12

The screw is metric.

December 30 2016, 9:36 AM 

6mm, 1mm thread pitch, and 12mm long. Sold at Lowes.

 
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