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Old November 20, 2012, 10:07 PM   #1
Senior Member
Join Date: April 4, 2005
Location: Ohio
Posts: 363
How to counterbore a barrel?

Bought an old mauser, the bore is dark but still have some shine and rifling is distinct. Noticed the rifling near muzzle is almost gone, drop a bullet with rear end first and it will go in almost 3/4" and stop. I have not shot it yet, but think I may need to counterbored it. How to do it without a lathe? Can I use a handdrill and a regular drill bit? How much oversize and how to remove burrs after counterbore? Thanks.
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