Handloader1, The 175's don't do quite as well, they don't seem to group as well and they drop a lot more. Nosler says they will perform better on an elk though. They say the 150's are made to expand on thin skinned, thin boned game like deer and antelope and the 175's are for heavy skinned, heavy boned game like elk and moose. I have heard stories of people using 175's on deer and the bullet doesn't expand and just goes right through them and the 150's sometimes will shatter when hitting an elk but have no experience with either. Thats why I've always switched shells and its worked fine but I am a lot more confident with the 150's and I tired of buying two different bullets and resighting my rifle every hunt.