Reloder 22 has been the powder to beat in my 6.5x55. Even though it's not known for stellar lot-to-lot consistency or for temperature resistance, it's been the most consistently accurate powder for me.
I've always thought that to be an odd idiosyncrasy with RL 22. It will vary like the elevation on a roller coaster ride but it will provide rock solid reliable accuracy once dialed in. Never have understood that.
