Barrel replacement question.

[gaucho1]

I have seen posts with modified .45acp revolvers with the
barrels set back and the cylinders shortened dramatically.

I am aware the normal practice to adjust BC gap is to shorten the forcing cone end of the barrel and recut the forcing cone
when the barrel is too long.

Is there any technical reason the muzzle end of the cylinder
cannot be faced to make a small adjustment, assuming a
doughnut around the ejector rod is conserved on the cylinder?

 

[bgrafsr]

You cannot do much of anything with the cylinder, because of head space at the rear of the cylinder & frame. The work has to be done on the barrel, by cutting the shoulder & shroud back, If it has one, and then adjusting barrel/cylinder gap, and re-cutting the forcing cone.
Does that answer your question?

 

[gaucho1]

You cannot do much of anything with the cylinder, because of head space at the rear of the cylinder & frame. The work has to be done on the barrel, by cutting the shoulder & shroud back, If it has one, and then adjusting barrel/cylinder gap, and re-cutting the forcing cone.
Does that answer your question?

Thank you for your reply.
Why can't you do anything with the muzzle face of the
of the cylinder. If you conserve the end shake issue
by leaving a ring around the ejector rod, what problems
crop up.?

 

[JKeefer]

Thank you for your reply.
Why can't you do anything with the muzzle face of the
of the cylinder. If you conserve the end shake issue
by leaving a ring around the ejector rod, what problems
crop up.?

gaucho;
You can..depending on your skill level, and the equipment you have available. I usually leave the barrel tenon long and reface the cylinder to fit by surface grinding. The process gives you excellent control of the end gap, and insures the cylinder face is perfectly square to the barrel face...The amount I leave on the tenon, is determined when evaluating the revolver, and what I am trying to achieve.

Good luck
Jerry

 

[gaucho1]

J Keefer
I was thinking the real issue is to be very careful
to really square the face to the plane of the cutter.

I have a friend that is a long time machinist and can hold
tight tolerances. I am also thinking that the BC gap can have both a variable ideal and if the gap varied a tiny amount when as the cylinder rotates it would still be ok. Underline tiny!
I very much appreciate you reply and it helps me to know
you choose this method. Thank You.
This Forum is graced with generous, patient and experienced members.
Lee is pretty darn good too.