I have a Tikka T3 LS in 270 WSM with a 24" barrel. I have ordered 150 grain RBBT's from Richard at Wildcat Bullets. Can anyone suggest a decent powder to work with? H1000 was working good with TSX's but I am running low on that so I'm open to suggestions on other brands or if you think I should stay with the H1000. Also how will these bullets perform in the factory 10" twist barrel?