I got a stainless 7mm RUM in a trade and had an idea of buying a neck bushing die set and simple necking it down to .277 with a .303 bushing, no shoulder change like kirbys .270AM. any thoughts on this? i would make a few cases and have PTG make me a custom reamer for it. I am thinking about using a 1-8.5" rock creek 28" to shoot the new berger 170gr EOL bullets. With info from the .270AM i think i would get to 3250 pretty easy with US869 and primers.