Would it be a bad idea to use a cordless drill connected to a poly brush and rod to clean the inside of a bore? And if it is a bad idea, what damage could occur from it?
Just get Wipe out Patch out and the acclerant. The foam works great as well. I JB the bore with a nylon brush every 150 shots or so. I let the WO PO set in the barrel over night and there wont be much if any copper left in the morning.
I knew a guy that did that with his IPSC racegun (pistol)....... made me cringe everytime. I can't even imagine doing something like that to a precision rifle barrel. Seems like the "rotorooter" approach to barrel maintenance.