Foolishly, I hadn't even thought about the impact of tube length. I know the 6x42 fits nicely forward on the rifle as it has a relatively long eye relief. Fitment is going to be concern, and I'll have to wait until I have the 2.5-8x36 on hand to see how it goes. The 270 is a Remington 700 that has quite a bit of machining done to its receiver and had Warne Premier bases shaped and permanently installed. The Warnes a from the late 80's, I believe, and are not Weaver-compatible, so I'm pretty much stuck with the standard 1" rings that came with the rifle... so no flexibility to go with extended rings.
I have Leupold VX 3 2.5-8x36 scopes on all my rifles....most shots are in thick stuff, but once in a while across fields.....The 2.5 setting is handy in the thick stuff. I am curious about your rifle......I have never seen a Remington 700 with that 3 position safety/bolt style .....What model/vintage is it ?