Just noticed something interesting- on the box in the OP's picture, the minimum twist rate specified is 9.2" or faster, if you look at the box further down in my pic, the minimum twist spec'd is 9" or faster. Got a pic of the top of one of your boxes? Sounds like they changed the minimum recommended twist at some point. Which batch did you get in on, the first lot, or the second?
I do most of my target shooting at 4000-5300 ft ASL, but in this case I was at moose camp at 2500. Interesting that with the exact same 7-08 load the RAR was keyholing and the Kimber was punching nice clean, round holes and grouping nicely (for a factory tube on a 6lbs scoped rifle). Seems like the 9" twist on the Kimber was sufficient to maintain stability, but the 9.5" twist on the RAR wasn't.
