Barrels are probably hurt more from excessive cleaning than actually shooting
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I’ll wait for gst and fritz to chime in though to get the correct answer
I always polish the bore before shooting. Using some non embedding cleaner, forget the name. Do about 100 passes, changing cloth every 25 with new compound, then a cloth with lube and a dry cloth.
Have I been breaking in rifles WRONG my whole life? Copper Bore Solvent every 10 shots for the first 50 shots?
what is being polished the tooling should not be leaving any markings if it does a little polish is no going to do any thing. I dont know how many machine shops you have worked in but in the few i have if tooling starts leaving any marks it is changed out and some one is getting an as chewing as you just wasted a bunch of time and money. Call and ask bartlien, rock creek, lija, or any other bbl maker and see what they say about the goop in the bbl polish method. For the average person who shoots a few hundred rounds a year it probably does not matter either way as the bbl will last the rest of your life.
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explained alot better than i can
So first you say polishing the bore will 'ruin' the barrel and now you are saying it wont do anything at all?
what if you buy a shitty remington 700 adl with the crap stock and the first 3 shots after sight-in are touching? Should you still "break it in"? Sounds dumb and a waste of lead, time, and cleaning solution.