I've recently acquired a 22-243 Shilen barrel rifle. It has a 1in 15" rate of twist. Does anybody have any experience with what weight(length)bullets it wil stabalize. Also it simply a .243 win necked down to .224 caliber. I need to get some dies and was wondering if Redding S-type neck die in 243 would work with the correct bushing. I also didn't know if the 243 body die would work. Any help would be appreciated.