The 300WM with 220 grain SMK ammo is with H1000. The 8208 has been a commercial canister powder used by ammo companies for years. It's just now available to reloaders. I don't know which powder they used for the 308 in this ammo.
The reading I get is that they are looking real hard to work with what they have. A switch over to .338LM would be very expensive compared to hot-rodding the .300WM.
I was sure hoping at least SOCOM would get on board for their snipers. Thus, other ammo makers would produce more and bring the price down on the open market......here's to hoping...