Re: 375 H&H
This is probably not the right location - you are in semi-auto rifles. Maybe bolt guns?
Anyway, the 375H&H has a lot of potential as a LR rifle. We have played with it at the sportsman's markmanship class, just to see how far a sport might take an ethical shot at an animal, in say, Africa or Alaska.
Based on the ballistics, it is pretty good, for that. Based on the recoil for a 20 or 30 round string..... not so much. I shoot a 375 H&H myself and have rang 1 and 2 MOA steel out to 500 yards. But.... I worked up the dope over a several day period, no more than 20/day. All shot sitting at a table, with lots of bags to hold the rifle, no bags for recoil. Mainly let the upper body absorb the push ( it's a pretty heavy CZ 550 ). Most folks will develop a pretty good flinch after more than that, some bring a pretty good flinch with them. You can build your tolerance some, but there are limits.
If you need some ballistics, the iphone programs are pretty close for the Federal Barnes TSX loads. Hard part is finding a scope that works for you. Not the time for a cheapie with tight eye relief.