H4350, H414I'm looking for powders to start load development on a short barreled .270 wsm with 140 berger classic hunters. (I don't know how short the barrel is gunna be yet, I plan to chronograph it at 26 inches and decide how much I am willing to lose from there). I can find some load data that should work for h1000 which will be a good starting place being as it shoots well from my 7 mag but H1000 is in short supply right now. I have lists of load data I just don't know adam from eve when it comes to powders. I am looking for temp stability first and velocity second. Im seeing re 26, aa magpro, ramshot, n560, 7828 ssc. Any ideas which powders I should be looking for?