This answer will not help you. But depending on what rifle I shoot, some I will hunt off a clean barrel like my Knight Disc and others like my Trade Rifle I foul the barrel and then hunt from a fouled bore. My Whites will just plain shoot and they are so little off from the first shot to the second, that anything I throw that fireplug into is not going to care about my 3/4 of an inch.

That is some excellent shooting you have there. You have little to worry about.