I've done full break in to the T for the full 50 rounds...I've done no break in at all and never see a difference either way...IMHO the full 50 break in is a waste of time money and barrel life.
i shoot 1 and clean for 3 rounds then shoot a 10 shot group and clean and I'm done...I do this just to see if the barrel is going to be a heavy fouler...while I do this I run my charge weights up and chrony the 13 rounds looking for velocities and pressure signs so I have an idea where to start with load development.
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