I have literally shot close to 1000 of the CT BTs (95gr) out of one of my 243s, and I've never experienced the "mud effect" when cleaning. I will tell you one thing about these bullets, I have never recovered one from any of the 200+ lb deer I've shot, and the distances have varied from 50-519 yards. I've also never had a deer take more than a few steps. I'm probably going to go load up another 150 of them today, and pull the 243 out of retirement again this season.