RE: 7MM Remington Magnum
I have been shooting 7mm RM since 1967 when I was living in Alaska. Most of the big game animals I have killed in my lifetime have been taken with the round. My Dall sheep at about 600 yards was the longest shot. Sheep died instantly.
I have a good friend who took his Kodiak bear with his 7MM RM. One shot-- and while I am not recommending this, it is worthy of note.
I plink with 110 gr hollow points. I love the 139 gr Hornady for deer. Not a heavilly structured bullet. I shoot a lot of 140 gr and 160 gr Noslers and Speer BT spitzers.
I don't know any rifle more versatile.
I like the caliber so well that I also shoot .280 Remington and I have a new wildcat 7mm that I designed that shoots 160 gr Speers at 3250 fps.
My .338, .243's .25-06 etc find themselves in their cases most of the time. The 7mm's have it.