Rlunardi wrote:The Rifle is a Victrix Scorpio TCT 26" Barrel 1/10 twist.....I know my opening question was wide of the mark which is why I am reaching out for help since I'm going from .308 to the .338 Lapua?
I need to understand what's the best powder for the round? what brand s are you using? I always used Sierra Match Kings in the .308 and have heard they are just as good in the .338. Also who makes the best reloading dies for this cartridge? oh and I'll be using Lapua cases as well.
And I did mean Federal Large Rifle Primers too
Looking at ADI's load data online, they recommend three powders - AR2213SC, AR2225, AR2217, with AR2209 being an option for lighter bullets up to 250gn.
The three seem to give similar velocity-for-pressure. AR2213SC is more efficient using about 5% less powder, but AR2217 is usually compressed which might translate to better accuracy, although it might also mean hitting a volume limit (as I do in .30-06). AR2225 also gets compressed in some loadings. If you're chasing velocity try AR2217. If you want to be able to experiment with all bullet weights try AR2213SC. If you want to find the best powder try all three and do extensive testing.