There is lots to think about in a one and done, all game, long range gun. I'll just touch on a couple.
For me, I started with what caliber gives me the best BC for a 180 grain bullet. 180 grain bullets have some serious knockdown power. That is the 7mm. Now that there is the EOL .270 170 grain, that is a contender. Next I focused on velocity and trajectory at long ranges. Better BC better down range energy and wind drift. That pushed me up to the 338's. Then I focused on recoil, brake the 338 makes it more shootable, 7mm and big bullets manageable, high velocity 6.5 with lower recoil...seem like I'm in a circular path of thinking.
I have a 7mm RM which is undisputed at killing elk at 1000 yards, 338 NM as well and a 6.5 SAUM for deer. If I were to pick just one, I would stick with the 6.5 and just get close to the elk and shoot heavy bullets. I guess I shoot what suits my mood.
For me, I started with what caliber gives me the best BC for a 180 grain bullet. 180 grain bullets have some serious knockdown power. That is the 7mm. Now that there is the EOL .270 170 grain, that is a contender. Next I focused on velocity and trajectory at long ranges. Better BC better down range energy and wind drift. That pushed me up to the 338's. Then I focused on recoil, brake the 338 makes it more shootable, 7mm and big bullets manageable, high velocity 6.5 with lower recoil...seem like I'm in a circular path of thinking.
I have a 7mm RM which is undisputed at killing elk at 1000 yards, 338 NM as well and a 6.5 SAUM for deer. If I were to pick just one, I would stick with the 6.5 and just get close to the elk and shoot heavy bullets. I guess I shoot what suits my mood.