I use 338 RCM here in Alaska.
Handloading can be tricky though, because handloads can not keep up with factory loads because Hornady has a super secret recipe.
I have some of their Superformance powder, but need to track down some recipes to see if I can get close to "box" ammo.
But, it's a great caliber of it took off. Same with 325 WSM.