I'm not sure on the 7-08 either Ray, wish I knew someone with one. The .243 I'm kinda liking the idea, wonder if the barrel twist would work for 55's up to the 85's?
My 243 was originally a 7mm-08 I put a 243 tube on. As far as twist a 1:10 will stabilize a 55-85. My 1:10 stabilizes all the way to 100 but doesn't like the 107's. Some 1:10's have issues over 90 grain.
I say lets all remove the warning labels and let nature take its course.