RE: 243 vs 270
The burris is a good scope,I just set up a rem 260 for a fellow a couple weeks ago and that is what he had on the 260(4x16)
I have several burris scopes and they are fine scopes.
I like the new nikon also got it to go on a 22/250 but got the new savage in 243 so decided to put it on it to try it out will put it on the 22/250 later.