What are the effects of out of spec cylinder to barrel gap?


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JonF
February 20, 2009, 09:14 PM
In both the cases of too *large* a gap and too *little* a gap? I can imagine some obvious ones such as rubbing and pressure loss but what else is there?

Gap too big:
pressure/velocity/accuracy loss?

Gap too small:
rubbing/binding?

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9mmepiphany
February 20, 2009, 10:02 PM
it's been awhile since i had one adjusted, but i seem to remember the range was .003-.005

too small a gap and you risk jamming the cylinder as fouling builds up

too large a gap and you end up with sideblast as the bullet jumps the gap

nicholst55
February 20, 2009, 10:22 PM
You will also experience reduced velocity with a too-large gap.

The Lone Haranguer
February 21, 2009, 12:03 PM
Large gap: excessive cylinder blast and particle spitting
Small gap: may cause cylinder drag/bind on the forcing cone as the revolver heats up

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