Picked up a pound of RL 23 today on a trip to a local pawn shop. I bought to try and get some more speed out of the 7 MM Rem Mag (previous topic question in this forum). However my curiosity gets to me and I often wonder what else I can use this powder in. I load for 243,270,30-06, 7-08 currently and my brother has a 6.5 creedmooor that we can load for as well. Has anyone used RL 23 in any of the aforementioned calibers?