if the CDL has a decent piece of walnut on it I would check the throat for errosion, even if theres only 50 rounds down the pipe, if its good i would do it. it is important to check the thre throat no matter what with the 7 RUM because 5 shots in rapid succession can fry the throat.
I personally wouldnt shoot a 375 HH just because I like a little flatter trajectory, and would want something at least RUM size for that bullet dia. and i dont think the rugers can handle that case.
The 7mm RUM probably isnt your best bet for something to shoot a bunch, but will be a great light wieght-long range hunting rifle, and will become a real performer when the 195's hit the market.