go with the 300 wsm. if you only need to shoot 7mm bullets, you do not need a mag, go with a 270. the 300 wsm is simply too good to pass up and the 7mm wsm has the short little neck that no one really likes to talk about anyway. I have owned three 300 WMs and sold them all, just did not like them (must admit the cartridge is hard to beat). have one 300wsm and love it. it is my "go to" rifle. for "trophy hunting - however you may define it", I like a 30 cal bullet of 165 grains. this can do any reasonable shot at any angle. I know you can kill them with 100 gr 25 cal bullets at 2800 fps but I prefer to hedge my bets. also, for larger game, the 30 cal is the way to go. the 300 wsm can do anything the 7 mm wsm can do but the 7mm can not step up to the heavier bullets if needed, ie 180-200 gr.