RE: 7 mm ultra mag, good gun?
You know- if I shoot three shots through my .308 in rapid succession the barrel is hot.
What are you going to do with this rifle? Is this for hunting? If it is are you going to be shooting long range?
Do you plan on shooting a lot? Most people who hunt, have no need of a weapon that has more than a 1500 round barrel life.
If you want to discuss the full capability of this cartridge, I suggest you log onto: longrangehunting.com and register there and ask those guys. They will tune you up in a hurry on the merits of the 7mm RUM.