I should have read your first post better. I over looked that you were shooting 150 grains. And thats a lot of powder for the 245 powerbelt. 2" at 100 yards is about right. I used to shoot 150 grains pyrodex rs withthe same bullet and thats the group i used to get with open sights. You could try the 295grain powerbelts, those may tighten the groups a little. Or maybe even the 338 grain powerbelt. I really wouldnt complain about 2" groups tho, thats good enough for hunting. I'd just be happy with the powerbelts thatallow you a quick second and third shot.