My friend is just starting out and he wants to know if he should buy a 338 RUM or a 300 RUM. I would normally tell him to go with the 338 but the problem is he is not going to b able to do much with the gun so mag size will be a issue with the longer bullets with both gun but I believe it is more of a issue with the 338. Than the 300. He will be buying a 700 xcr and using mostly for elk out to 1200 when he gets able to. So the 338 would be nice for that I have ran the numbers and a 338 shooting 250 SMK about 2900 to 3000 and a 300RUM shooting 200AB at 3150 to 3200 are pretty much the same so what round do you think he should go with and why. One ? I had is how do the 250 smk open up at long rang 800 to 1200.