WB
I think they are probably a little tighter too
Thursday, December 28, 2017, 08:04

It's a bit of a skill to consistently measure cylinder throats with a dial caliper. Just takes practice at only that. Pin gauges are very interesting to toy with and a sure thing. I can usually get within 0.001-0.0015" using a caliper compared to pin gauges. I'm a hobbyist at best.

I have found only ONE gun, revolver, with a "tight bore" or constriction in the bore. This is out of about two dozen I've checked. Interestingly the one was a factory barrel not custom. It was an odd case and only detectable, reparable, monitoring it with pin gauges. Cylinder throats are checked by poking increasingly larger by 0.001" little "pins" or round mic'd cylinders until you find the one that won't quite go through. A good way to amuse yourself for a while. All the effort is negated if you simply shoot a cast slug a bit larger. Forcing, by shooting, it makes it fit.


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