Ditto on .338 LAP
300 mag is still a 30 cal bullet. Not the worst, but def not the best. It'll get there, but it's a lot more work to hit and repeat. 6.5 peters out (even hot) around 1300 yards, .308 a good deal in from that and you've got a lot of variables to ride out that far with small and slow(er). I'm also at 1400 elevation up here.
Click...wait 5-6 seconds, dink. That's a haul.
Our range is 1460 (so not technically a 1 mile shot like OP asked)....very accurate dope still has the .338 supersonic for a good ways past a mile, but scope won't climb that high without help even on a 40 moa base...(TAKE NOTES SONNY!!! It's an expensive lesson!) but after finding the load my gunny likes, 90g of h-1000 pushing a 270 eld, it's
almost easy. I'm sure pushing it 1 mile or over would present more of a challenge but for me the .338 eats it up.
That's me steel gonging a 2x2 at 1460 with a factory savage 110 ba (on the cheap) topped with a pst 24x 2fp. Hilltop to hilltop. Pics on request.
For the some of us:
My uncle, who's got it like that, is holding .5 moa GROUPS with his 6.5 sweed, but I bet he's got 4x the amount of money in it with all the reloading stuff alone. His bullet will damn near fall out, and he has to single hand load they're sticking out so far and it's a barrel SCORCHER. But, everyone has their own end game.
For me, I just wanted to hit what I was aiming at....right tool for the job is often the most obvious.
If I find a line 1 mile + I'll be hitting up barrett for a .416