Xtm,
I messed with all sorts of Long Range Rigs in 7mm Mag, .300 Win Mag, .300 Weatherby, .338 Mag, and even .338-'06 but they all beat me to death and I couldn't shoot them that well. I was about to give up when this 721 in .300 H&H came along.... I was gonna trade it off but no one wanted a old brushed blue 26" Remington chambered in 'dead' round. So thinking i was stuck with it, I tossed on a Leupold 3-9 and took a box of factory shells to the bench. I was stunned by the first group and amazed at the light recoil....
So I kept it.... that was ten years ago and since then I've killed 8 or 9 deer with it, including two (in front of witnesses) at over 300 yards... one was probably 50 yards beyond that!
I've burned up all the Factory R-P ammo in 5 states and have been reloading and now handloading for it. I just gets the job done.
About 5 years ago I found a post '64 Model 70 "Classic Sporter" that's real pretty, but the old Remington 721 is what gets the field time.....
This past year I replaced the 3-9 with a pair of scopes.... a Leopold 1.5-5.0x for walking around and a 4-12x for when I get to and set up on my long watch. I've done alot of checking and the Leupold QD rings are completely repeatable. Just to back up the whole works my son DJ made me up a custom base for the rear QD ring that allows permanent mounting of a Lyman 48 receiver sight.
As Lee Van Cleef said in "For a Few Dollars More"..... It is a system that works well for me.....