Re: Tuff time making a final decision
My approach would be to ask myself how far do I want to shoot? Then take a look at the bullet/load pssibilites including brass options. Then run some ballistcs and check the performance. Personally, I would not shoot on an average size or bigger buck deer past bullet opening velocity which is about 1800 fps for a lot of bullets. If you put the shot in the right place and it pencil holes, you'll kill it, but will you find it. *If* you get the spine, you'll put it right down. Antelope are pretty delicate critters and are not likely to go far even with just a pencil hole. I consider a 270 to be about a 700-800 yd deer (buck) gun depending on the bullet/load and elevation.
It really comes down to crunching the numbers, *or* your personal preference and accepting the performance of that preference.
For me, the 270 Win is the bottom end of LR hunting, but that's just me.