Loads for AIAX 338 with 27 inch barrel

[siglover]

Which powder and primer is everyone using in their AIAX 338 with the 27 inch barrel? Specifically which powder does the 27 inch barrel like best?

All I could get my hands on so far is

Powder -Retumbo
Primer - Federal 215 and CCI 250

Bullets I’ll be testing with are
Lapua 300 grain
Sierra 300 grain
Berger 300 grain once I can get my hands on them. Anyone have any they would like to sell send me a message

Thanks

 

[Xtremegunnr]

Sierra or Lapua. Similar results but sierra are way cheaper. Retumbo 89 grains to 95 ish. Start low. 10 thousandths off the lands or mag length. Retumbo is better for longer barrels in my experience. H1000 is better for shorter. Hope that helps.

 

[siglover]

5 shot group 100 yards. Last one got away from me.
85 gn Retumo
Sierra 300gn
Federal 215

 

[Xtremegunnr]

Looks good. Gotta crank up the old velocity now

 

[siglover]

Looks good. Gotta crank up the old velocity now

Thanks!! i'm just working up the load and wanted to start in the middle.

I'm learning and I'm sure as hell not the best shot but this rifle sure does make you look good