No actual 338 rum experience.

Alliant has a new group of powders called power pro and you can get another 100-150 fps out of those
in general but they are new so not a lot of data.

Think I would want a different cartridge in AK depending on how you hunt.
338 rum wants a long barrel and I want a short barrel for a hunting rifle.

For me I would prefer a 375 ruger with a 22" barrel.
Witht he right bullet the 375 ruger has decent trajectory.

If you are going to stick with 338 caliber, RL17 should be a good one in the 338 winmag,
338-06 etc.