Remington has had the wisdom to reintroduce both these cartridges recently. It is unfortunate, in my opinion, that they have reintroduced them in a rifle that many today will consider just plain ugly. I applaud the longer barrel and the M7action, but the looks are certainly not for everyone. At least I haven't heard any gunwriters biching about the bullets having to be seated too deep in the casing as yet. It would be great to see them evaluate a cartridge on what it will do, with factory loads, in an available rifle... instead of daydreaming about how much better they can handload the round in a long action rifle. Another great cartridge, the .284 Winchester, was killed by rifle availability and gun scribe idiocy.
Reelhook,
I shoot a .35 Whelen AI, basically the ballistic twin to the .350 Mag as onesonek pointed out. I can't see where you'll be dissapointed with the rifle unless you are recoil intolerant. The recoil is managable, but it's is certianly there. Depending on the rifle you purchase it shouldn't be a big issue. I had the opportunity to shoot a Remington M7 KS in this chambering one a few occasions, it weighed in at about 6.5 lbs with a compact scope mounted, it was BRUTAL from the bench. If you want a light one, by all means get it, you carry it alot more than you shoot it.