On a slightly different note, while I understand that a slightly pitted bore will affect value, but does it effect shootablity/pattern? As an example I own an ancient GEW 98 WWI Mauser with a terrible ringed bore. I can see the rifling though. However the rifle shoots almost about 2 MOA...even off those rotten open sights. It is a tight bore and is so marked at the breech. The trigger while a two stage is light as a feather!
Okay, we are talking about shotguns. Does a pristine bore shoot a more even patter than a blemished one?
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