I just bought some H4198 and according to manual with 16 grains I should be under 1500 fps. I will check out Montana bullets today. The laser cast have a bh22 but are not gas checked. They do fine with hot loads in my 45 rifle without gas checks. I would have thought a BH of 18 was pretty hard. I am new to these so willing to take any advise. I am also going to try and find some 170 Nosler sporting bullets jacketed and see how they work. The 150 Sierra SP doesn't do me any good.