ah man if its the cabelas hawken you GOTTA try the 250gr Thors. Ours LOVES them with 110gr Pyrodex RS. Im talking well under 2" groups @ 100 yards with open sights. It most likely will take the .501" Thor but you should order a free sizing sample first. And before anyone starts. Yes they are expensive but CHEAP for Hunting.

Shoots patched balls great too but in the early years we used 90gr pyrodex rs with the 295 powerbelts with excellent results on game and on paper.

But seriously, email Thor and get a sizing sample to try out. If it takes the .501 i will send you some to try in that Hawken.