I'd be curious about the 22. I read through the 22 UM thread and a few other PRC 22 threads. It seems the guys tinkering with it got to a point of no meaningful returns over a 22 Creed.
I was wondering if a Sherman Short Tactical case would work. I ended up buying a box of 6.5 SST a few years ago. Indented to build one. But looking at the case the other day it looks like it'd be super sexy with a 22 cal pill.
No caliber restrictions in Montana.