I like the new short action magnums, and will eventually get a .300 Short Rem. It seems that between a choice of a .270 or a .284 short action magnum, I'd opt for the .284 because it has a much better selection of bullets for handloading. The .270 WSM to me seems overbore, very similar to the 6.5 Rem Mag, only .006 difference in bullet dia., but with a larger case. It sure would be flat, and I guess if you put 2,000 rounds through it and burned the throat out of it, you could always have it rebarreled to a .284 or .30 cal.