When I bought the rifle I've been shooting lately, Track of the Wolf recommended a .010 patch and .375 ball for the load, so that was what I bought from them and took out to shoot with it the first time. That load just about falls down the barrel. After the first shot, I switched to using two of the .010 patches, and that gave very good accuracy at 25 yards. I've since ordered and been using thicker patches for that rifle, but I didn't have any issues with two thin ones.