The 338-375R&R is a wildcat based on the .375 H&H case blown out and necked down...it would be similar to a 338 STW if you will. Ray Romain (gunsmith) developed it for 1000yd bench rest shooting. I believe his gun wears a 34" barrel and he shoots an old Baush & Lomb 24 or 36x target scope on it. Total gun weight is right around 60lbs! They hunt every year in Colorado and take Elk from 600 yds out with a variety of guns. He was shooting a 250g SMK out of it.
More amazing is the fact that he shot a mule deer two years ago with the same gun at over 1800 yds (aka 1 mile)! They rented horses and it took them 4 hours to get to it.
Oddly enough he now shoots a 6.5x284 at the bench. The high b.c. 6.5 bullets are hard to beat unless your shooting a 240g 30cal or a 300g 338cal Match King. At the same velocity, with the same bc, they will have the same drift and trajectory. Of course with the bigger bullets you do have more energy. (the mule deer Ray shot, dropped in it's tracks due to a shoulder shot...at a mile!) The 6.5 is a lot of fun to shoot because it's super accurate. If you want some real horsepower in a 6.5, look to the 6.5x300 Weatherby. A lot of guys still use it for long range hunting because they can drive the bullets to their integrity limit. It's not seen too much in benchrest use any more because it give somewhat irratic results due to the big case and amount of temp. sensitive powder you have in it.
My next gun will probably be a 338-300Tomahawk so I can shoot those nasty 300g Match Kings. I'm really wanting a heavy gun but truth is, my 6.5 will reach anything I can find out here in Pennsylvania.
