Re: .300 H&H Magnum
I've owned a couple of different rifles in the original .300 magnum and I've loved every one of them. I bought a Remington 721 from a cowboy in Arizona who carried it in a saddle scabbard. It was dirty with some wear from the scabbard, but he kept the bore and action clean and it hadn't been shot much at all. After a bit of accurizing work and some cosmetic repairs, I had that rifle shooting incredibly well with everything from a 120 gr. to a 190 gr. BTSP. I now have a 700 Classic (made in 1983) with a little custom work done and I have a Sako Safari in .300 H&H on the way.
You'll find that the .300 H&H is extremely versatile. The case design, unlike the other .30 magnums, allows for a lot of latitude in bullet length and seating depths, lets you tailor your handloads to exactly what the rifle likes and I've never found the recoil uncomfortable at all. Needless to say, I'm a big fan.