So, I'm planning on rebarreling my 243 into a larger caliber. I originally was set on making it a 260 but now am thinking of a 270wsm.
Rifle will be built to be a hunting rifle first, but want to be as accurate as can be too.

Goals: 500 yard deer killer
6" groups at 600 yards
Eventually shoot paper out to 800-1000

What I've come up with so far

260: pros: light recoiling
Can be very accurate
Lapua brass
Many bullets available

Cons: not sure of maximum effective range

270wsm: pros: better long range ballistics

Cons: more recoil (maybe causing me to be less accurate)
Fewer bullet choices
$ pricey brass
I'm not sure if the 270 is as highly regarded as being as accurate long range

Gun will be a savage model 16 short action small shank. planning on mounting a krieger barrel. 260 would be 8 or 8.5 twist shootingn130-140 gr bullets. Not sure of what twist would be best on 270wsm.

Anyone with any advice?

Bryan