I own a 338 Rem Ultra and I can load 250gr bullets to 3048fps but I don't know what kind of group it would shoot. Guess I'll have to try it and find out unless someone has already tried it. How about the 180 gr bullets going 3514fps of couse they are Nosler.

every rifle is different so youll just have to try each load and see what works for you and your rifle

i shot a a remington 700 ss laminate stock 338 ultra and i liked it and usually i dont shoot anything under 375 as a rule but man the 338 was real nice