A while back I started working up a load for my 300 Win Mag.I used 165gr Barnes TSX with RE-22. Got nice results with 74.5 gr(max is75gr according to Barnes data) All well and good until summer rolled around, I got a sticky bolt during warm weather. Backed off to 71.5 gr. Got decent groups, killed a decent 5x5 on my first elk hunt. Alliant has now brought out RE-23 which they claim is temp stable, problem is neither Alliant nor Barnes have any data for that bullet with the new powder, any idea for a starting load when no data is available?

Here's some data to get started with, not the same bullet, but it is something to get going.

Data