Barnes sells one for spitzer style bullets or you may be able to get one from extended range bullets sold by Cabelas. I have both and work good. Both Shockwaves and SST's shoot 1.5" at 100 yds consistently with 150 gr Triple 7 loads. Went out today saw plenty of flatheads but was looking for some horns. I expect them to perform pretty good since they are from Hornady.
Muddyboots