.270 rum
I've been doing some research into making my .270 Win into a .270 RUM (.300 RUM necked down) and so far I've talked to about 8 smiths and about half of those think it's possible. So I'll probably just buy a reamer and my local smith and I can tinker with it until it works...
Right now I'm running a 26" 1/10 Krieger so I'll stick with 150gr VLD's, hopefully push them around 3400-3600fps. But, since I will have the reamer, a 30" fast twist .270 may come one day too!
Stay tuned, should be a fun project!!