Buckshot, I assume you mean higher max loads? Barnes state to use the x bullet for load development but it may be possible to exceed that by 1-2 grains like XLC. Key word is MAY! I have been toying with the TSX and the max load for x bullet appears to be ashigh as I would take it in this particular rifle. However in another rifle it may be possible to throw in a few extra grains. So like anything slowly work up until you reach your max for that particular rifle is the best policy.

So far this rifle likes 1 grain under published max the best I have tried and groupsvery well. Am going to try some .5 changes before settling the load just haven't had time or the weather cooperation to hit the range.

Not sure if that was what your referring to or asking, so if not disregard.[&:]