It looks like it's a keeper. I mounted up an old Leupold (what else?) 1.5-4x scope and took the new Ruger #1 Tropical Rifle to the range today. I brought along the old standby Winchester Model 70 as well, just by way of a side by side comparison. Here are the rifles:
The M70 has always shot well, with just about any 300 grain bullet and a number of different powders. One of its favorite loads is the Sierra 300 grain boat tail over 79 grains of W-W 760, for about 2536 fps.
As luck would have it, they actually chamber in the #1 after having been fireformed in the M70. I prefer not to full length resize, especially with the extremely tapered .375 H&H case. So this was a stroke of good luck. Cases fired in the #1 also chamber in the M70, so it looks like I'm business from that standpoint.
Even luckier, the #1 seems to like them. It shoots them well enough, considering they were worked up specifically for another rifle. I would love to have one load that is used in both. I have found .375's (and I've been through a few...) to be generally friendly rifles, shooting just about any reasonable combination reasonably well. Anyway, one of the 100 yard targets:
Bottom three are the M70 (I was using the bottom of the bull as an aiming point) and the top three are the #1. Nowhere near match accuracy, nowhere near varmint rifle accuracy, but certainly good enough for a pair of hunting rifles generating darn near 4,500 ft lbs of muzzle energy. Certainly good enough to hit anything I'm likely to point them at.