JTD,
Welcome! I personally use Cleanshot and I like it. There is a powder called Clearshot and that is the one to stay away from; don't get the two mixed up. Cleanshot is great to clean. I've (by accident) left my ML uncleaned for a couple days after shooting and it cleaned right up with no pitting or anything. If you still have problems then give it a try. As for bullets, all I know is to stay away from Powerbelts (in my rifle anyway). Each rifle is different and will shoot the same round different. I have found in my rifle, it's a CVA, that I would get a "flyer" out of nearly every three shots using the powerbelts.

Good Luck,
Deer1