I do not find Patch Out (even with accelerator) any better than straight Butches Bore Shine - however, Wipe Out(foam) has been super and cleans all the copper with an overnight soak - an over night soak is something you don't want to do with a solvent with ammonia in it. With Wipe Out, it's proper (muzzles slightly down).

I use Kroil or Hopper's Solvent for conditioning the bore after Wipe Out. The Hoppe's #9 Solvent is one of the best rust preventatives there is. It is better than about any standard gun oil.

One oil patch, then 1 or 2 dry ones, falling off at the muzzle.