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Old July 6, 2012, 03:25 PM   #1
Pond, James Pond
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Join Date: July 12, 2011
Location: Top of the Baltic stack
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Bore gauge: how do they work, and what should I look for?

I will probably be going to look at a used .308 bolt action next week. It's one I've been considering some time, but without getting any closer to a decision.

A shooting instructor who tutored me in the run up to my IPSC licence test, offered to lend me a 7.62 calibration tool.

Apparently, it can be used to check the bore which allegedly ranges from 7,60mm to 7,64mm and should show the life time of the barrel.

Hopefully, I can get hold of it next week and go see this bolt action in the shop.

Can anyone advise me what the values might indicate?

i.e. what sort of bore diameter would be an indicator to walk away from a knackered barrel?
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