Small ASM chambers?

[eggwelder]

Was cleaning my range and recovered about 200 .36 cal balls from my ASM. The fairly undamaged ones have very little rifling marks. Thought that was odd, so i chambered a ball, knocked it out and set in on the muzzle crown. Didn`t fall down the barrel, but almost. I can see the rifling grooves around the ball.

The fired ball can be pressed somewhat into the muzzle, and gaps can be seen around the grooves.

thinking the chambers are too small? It does not group, per se- hitting what your`re aiming at seems more like luck.

the balls are .375

the ASM has a date code for 2008 manufacture.

 

[eggwelder]

So is a replacement cylinder the solution or what am i looking at?

 

[hawkeye2]

Have the chambers on your existing cylinder reamed out. Do not go all the way down to the locking notches. You probably would have a hard time finding a replacement cylinder for your gun and I'm sure it would have the same issues. Here's who does mine:

http://hahnmachineworks.com/index.html

 

[hrt4me]

I hear good things about Hahn's work

 

[Grenadier1758]

The chamber will shave off the extra 0.005" and the former 0.380 ball still won't fill the barrel when the revolver is fired.

 

[eggwelder]

I get a nice lead ring shaved from the ball.
i`m in the great white north, political situation between our nations as it is, i may never see my cylinder again.
is reaming the cylinder a gunsmith job or can a machinist type do it?

 

[hawkeye2]

"is reaming the cylinder a gunsmith job or can a machinist type do it?"

Either so long as they understand what the goal is and have the desired reamer.

 

[bang]

I get a nice lead ring shaved from the ball.
i`m in the great white north, political situation between our nations as it is, i may never see my cylinder again.
is reaming the cylinder a gunsmith job or can a machinist type do it?

A drill press, good drill vice, plenty of oil and select a reamer that's +.003 - .005 over bore at grooves.
Did an ASM Walker. The bore was at plus diameter. Shot horrible. Reaming cylinder to .451 put it right. Polishing the crown and cone helped too.

 

[eggwelder]

Is that a straight down reamer or something that starts slightly tapered to get it in the opening?
guess i need to get some good calipers- digital because i can`t see the little numbers on my other one any more.
suppose it won`t be much different than reaming model A axle kingpin holes.

 

[Bad Karma]

I hear good things about Hahn's work

He can ream the chambers and accurize the pistol as well. Now that Tom Ball is no longer with us he’s the go to guy.

 

[Bad Karma]

Is that a straight down reamer or something that starts slightly tapered to get it in the opening?
guess i need to get some good calipers- digital because i can`t see the little numbers on my other one any more.
suppose it won`t be much different than reaming model A axle kingpin holes.

It’s a straight reamer called a chucking reamer. I would recommend using pin gauges to measure the chambers calipers aren’t really great for this work. Amazon has what you need for the job.

 

[eggwelder]

I will look for those tools.