I don’t know if you still check the forum sawman, but I’ve got a few more numbers for you. As I said above, I’m getting about 200fps less (2515fps) than a 375 H&H with the 270gr. I am not at max, so I bet I could close the gap a little more. I shot a buck a week ago, and that Speer 270gr SPBT did an excellent job.
I just got back from the range and chronographed the 300gr PRVI RN load, it is not at max, but it was getting and avg of 2480fps, which according to my manuals, is about 120fps shy of the 375 H&H. It shot a 1.8” group, so I think I’m going to slow it down a little and see if I can get it closer to an inch.
It’s pretty amazing how close it comes to the 375H&H with 20-30gr less powder.
JTD