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I am new to firearms, and recently purchased my first rifle which is an old m91/30. I have yet to shoot it, and noticed in the barrel the first inch or so is not rifled at all, then the rifling starts and looks good, though a little pitted.

is this what they call counterboring? does this affect the performance of the gun at all? I just wanted a rifle that shoots straight as I just started shooting and don't know if I should look for another gun. thanks!
 
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Counterboring is something done to correct poor accuracy resulting from damage to the rifling at the muzzle end. This was usually caused by aggressive cleaning from the muzzle using a steel rod. One of my best shooters is a counterbored 91/30 ex-sniper. As long as you find the accuracy acceptable, don't worry about it.

Keith
 
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