Since you seem to be shooting well, as far as making contact where you want, and have proven this year you can do it I say stick with what you are using. Maybe shoot for the shoulders to get the most chance to use the energy of that big slug. So what if you have to scrap one of the quarters as long as you put it down. And if in doubt shoot again. I learned hunting bucks only on public land (granted this is with a slug gun) try for shots that will knock the deer down. For me that was middle shoulder shots. The deer I shot this year with a 240xtp didnt bleed at all, but only ran a short distance because I fortunately hit the bone. I have also lost deer shooting them with rifles. Sometimes thems the breaks.