Re: Which cal?
I guess I am confused why you need a large amount of hitting power for deer? They arn't that hard to kill and the calibers you listed just punish yourself when ya shoot them.
For what you are doing and the farthest you intend to shoot ( 300m) A, 308, 7mm-08, 260 Rem, 243, 30-06, 270, 257roberts etc...) is plenty of power and a hellova lot more fun to shoot....
Just my .02