2209....lots of it ;)
if I was into American powders RL22 would probably give slightly more but in reality my 2209 load is plenty and definitely on the warm side but brass life so far seems good.
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Around 57/57.5 gns of 2209 will give you low to mid 2800's fps with a 180 in a 22"tube. However i have had some rifles where that load is a bit warm and have to drop back to 56.5. Its a pretty std 06 load. No secret recipe.
@buzzman if you had a 20” 308 and a 20” 30/06 side by side (and loaded to equal pressure) the 30/06 will win the velocity contest every day.
It won’t win an efficiency competition at short lengths, but at the end of the day- burn more powder get higher velocity.
I load 57.5 grains of 2209 with 180's for 2700-2800 fps depending on the rifle. 58.5 grains will get you up over 2800 fps with no issues but I lose accuracy.
I have found 2209 the best powder in the ' 06, but I have often wondered what a curious man could do with a tin of Superperformance...
I always find it amazing how much a difference calibre makes in how powders perform.
2209 is my favourite for the 270. But I had to double check your figures as It seems way overloaded in comparison too my 54grs for a 130gr projectile. Yep sure enough you are correct and it seems like its pretty much the ultimate combination for that powder.