Best 338 Win Mag powders?

[Ray123]

Depends on what you want, high velocity and energy, don't always go with great accuracy...
338 WIN MAG is for hunting, at moderate ranges that I shoot ...so I run heavy bullets at highest speed, like 275 gr bullets at 2675 fps with RL-26.

 

[65swede]

I shoot 225gr accubonds and R23 in a Model 70 that has a weatherby length mag box and bolt stop. .040 jump nosler brass wlrm.

.75-1.0 moa, start at 71grains.
Mine tops 2900fps

Not my most accurate hunting rifle, but it crushes Elk.

 

[FNSafari]

Your rifle and bullet combo, seating depth will tell you. IMR 4350, H4831, RL 19, 22 just get a good loading manual and start the process of experimenting to see if there is a marked preference for one powder vs. the others.

 

[20VarTarg]

I love my 338 Win Mag but I rarely shoot it because the recoil just isn't pleasant. I run RL 19 and H4350. I have 2 loads using 2 different bullets. Best 3 shot group I ever shot at 300 yds was with the 338 Win Mag. Maybe the kid the rifle was built for just isn't ready for the BIG BOOMER. Some shooters will get a flinch with the recoil.

 

[FNSafari]

Nice thing about a caliber like the 338 win mag is it can be loaded down.