Hey Ground Pounder I haven't seen any rule changes allowing .30cal bullets. As of now the minimum diameter is .357, with a max case length of 1.8". I've had good luck cutting down 35 rem brass to 1.79" and loading Hornady 200gr. FTX bullets to normal OAL. These cycle and shoot well in my 1969 Marlin 336. I took a 12 pointer this past season with this combo and after a hit through both lungs at 60 yards the deer took about 3 steps before he piled up.
