I never pushed mine past 92 gr. Of H-1000 .No pressure signs at 100 grains of H1000? Mine got loose primer pockets with Norma brass at 99grains of H1000. Guess no 2 barrels are alike!
I put mine together to shoot and injoy not to be the fastest kid on the block . They are amazing on critters . But my identically built 338 Rum is the same all around except dies are cheaper and a little easier to load , less steps . Both of the 30" carbons I had sent the 300 gr. Berger at 2884 ft.per.sec.
I havent put in a 4" wyatt box in any of mine yet . I have one setting on the shelf right now . They shoot so good and if I do my part it's over in one round . Some may need to put the box in , I might on my next one .
Rum Man