I had a beautiful stock Savage 116 in 7 Rem mag that had a rough bore. 140g Nosler accubonds with 65.5g of IMR 4350, Rem case, with Rem 9 1/2 shot 1/4" three-shot groups for 9 Shots on a down to bare metal bore. By the 12th shot, the group was 3/4", and at 20 shots the groups were 1.5". So, the barrel got cleaned a LOT! The Stock had pillars and was bedded.
Montana Extreme Copper Killer, applied with a sloppy wool mop, was my friend, and JB every 100 rounds.
Justin, It would ruin your barrel to lap out those drill marks, opening up the bore dia, and I have done this on a good shooting Savage barrel, just to see what would happen with Brownell's 600 grit carbide bore paste.
Montana Extreme Copper Killer, applied with a sloppy wool mop, was my friend, and JB every 100 rounds.
Justin, It would ruin your barrel to lap out those drill marks, opening up the bore dia, and I have done this on a good shooting Savage barrel, just to see what would happen with Brownell's 600 grit carbide bore paste.