Ihunter03,I havent tried any slugs over 235 gns but I use 35.5 gr of reloader 7 with hornady 220 flat points or 225 spire points out of a 14 inch ss contender and its giving me just over an inch at one hundred and the 225's fly a couple of inches higher at 200. I havent killeed any thing with the 225s but the flat points kill big hogs quickly.Good luck.