Chap Yespenetration will be important after accuracy. I use a 3/4 inch piece of plywood and 3-4 phone books forpenetration and most importantly lead retention. I was the guy that got blasted by the powerbelt lovers during the fall after I reported their light weight bullets exploded on impact. The light weights were the worst of 10 slugs I tested. Now for those PB lovers I did not test the heavier bullets. They will be a part of this test. Also after reading more articles than I can believe about the PB I am thinking that they can not be pushed with alot of powder. At 100 grains they have major issues. Just my finding as a non expert. I have a simple formula for success. I want a bullet to be able to blow through a shoulder and enter the boiler room intact not in pieces.