I was referring to patch thickness not ball size or dirtiness of the barrel. The .020 patching works great just a little tight so kind of hard to load in the woods if a wounded elk is "saundering" off. Much easier to ram that 2nd shot down the tube with .015-.018 on a ball board with a greased patch as both loads shoot to "minute of elk".
I shoot out the load, clean and reload every night back at elk camp as the area we hunt is at 6,000 feet and may or not have snow, rain clear skies or a combination of all. Temperatures are generally low 20's to low -20's at night. So in the morning I would still have a fresh load with the tighter patch?
Clear as mud?