They will all work fine. One thing I would check is the barrel contour on a M7, there have been reports about accuracy issues with some M7's with the very thin whippy barrel in STD. calibers, not sure if the magnum comes with a heavier contour. My SS M7 in 7-08 shoots most everything under 1 1/2 moa out to 350-400, which is good for a very light handy factory rifle. It has the 20" whippy barrel. Probably a #1 ish or less contour.
The OP was not asking about very long range work, but since it was brought up in terms of ballistic superiority, here's my two cents. Relative to ballistic superiority between the two calibers, with factory rifles used to hunt out to 500-600 yards or so, not much real world difference with similar bullets. Some of the heavier & higher BC bullets may or may not stabilize in these rifles (ie: .284 195 gr Berger ) or have adequate LR terminal performance at the muzzle velocities you could attain in these rifles.
Both calibers are on the short list of best LR hunting calibers, but with larger cases than the OP is considering for more velocity with heavy bullets, in most cases. One being better than the other for hunting is more about current bullet availability and recoil tolerance than the bullet diameter.
