I'm late to the party, but have been watching the thread.
My .375 is the Ruger. It's got a curious history. It belonged to a physician from Columbus, Ga. He took it to Africa and reputedly killed a variety of plains game with it. At some point, the rear sight was damaged or removed and the screw holes WELDED! over.
I bought the rifle cheap. It shot well, but I wanted the original rear sights. Sent it to Ruger. They refused to repair it except for rebarreling it. They made me a very reasonable price.
The original barrel lacked the barrel mounted sling swivel. New barrel has it. So I have now for practical purposes a MkII African, instead of just a "Hawkeye". It only had a 1/2" rubber pad, I fitted a 1" Pachmayer "Old English" Decelerator brown recoil pad, after cutting 3/4" off the stock. It fits me like a glove, and really softens it's "kisses"...
I bought 2 boxes of ammo on clearance at a big box store for $20 each (Hornady 270gr Spt), and 100 cases.
I've worked up a variety of loads with bullets I've scrounged from numerous flea markets, gun shop clearances. Even found a bag of almost 200 Sierra 250gr GK for $25!!!
I've killed two deer with it. One with 235gr Speer, one with 250gr Sierra. Both using an accurate load with RL15, more or less at H&H speeds. About like using an '06 with 180's, except for the "divots", er, uh "TRENCHES" in the dirt behind them...
The 23" rifle gives about 100fps slower than Hornady claims, but handloads match the manuals. Accuracy is very, very good...
I have a Lee 255gr mold, but not crazy about it. It's for a straight case, 38-55, the Ruger needs a bore-rider style 270gr IMO. But, with 10gr of Unique, it's a fun plinker...