I am planning on using my 300 Winchester Magnum with a Rcbs 200 gr. SIL(gas checked of course) for Elk this season but all load data listings I have do not go above 190 gr. The rifle has a muzzle break so I was wondering if fouling would be a cleanup problem. Not worried about it when hunting but during load development. Any suggestion where to look. Cast pics is reflecting the 190 gr. ceiling as well as all of my Lyman Handbooks. I do powder coat as well as conventional size and lube.