If you are shooting factory ammo,look at the box and tell us what you are shooting.I don't know of any factory 7mm express being offered.Thats where the 280 Rem comes in,they are the same cartrige.

Now if you have A 7mm Remington Magnum,thats a diffrent story.

Both are good elk rounds and have killed tons of elk.I would go with 150 Noslers in the 280 Rem. and 140 gr Barnes TSX in the 7mm Magnum.
Leave you gun dead on at 300 and practice,practice all ranges 25-yds to 400.
Aim for behind the shoulder and leave the 400 yd trick shots to someone else.
BBJ