I have Sweets and CR10 on the shelf. along with several others, Butches Bore Shine, Outers, Birchwood Casey's Gun Srubber. - Barnes CR10 and Sweets, heretofor the best copper removers other than JB in normal rifling ar enow sitting dormant along with the others, except for Butches.

With the advent of my shooting .17 cal rifles, which have only .002" of rifling depth, and the possibility/probability of damage to the throat and muzzle with multiple strokes of the rod suing any solvents or paste - yes - I have custom made bore guides), I've switched entirely over to Wipe Out foam.

I have a bottle of accellerator, but it doesn't work well - for me. I foam the bores, let them sit, slightly muzzle-down and 2 patches pushed through in the morning that fall off at the muzzle and they're clean - any of my rifles, even the bad foulers, the 9.3x57 and .375/06IMP - both seem to pick up more copper than they should. Wipe-Out has worked incredibly well for me.

500 - that DR's muzzle - horrid damage, or misuse or whatever. Nasty oval with missing lands and grooves. Can't be bore wear from a rod, - if so, must have been fiberglass or a long rat-tailed file & why isn't the right barrel worn and why would anyone clean from the muzzle in the first place? That's not clear thinking at all.

I've seen the muzzles of muzzleloading DR's filed to divert balls in or out to counter poor regulation, but this doesn't appear to be that, due to the narrow 'groove' cut out, rather than an even dresssing of the muzzle at an angle.