Ladies and Gents,
I give you from Federal Premium Ammo and interactive ballistics guide
http://www.federalpremium.com/resources ... ation.aspx
I just went to this and downloaded it to my PC and this is what I found out...
260 REM
120 gr Nosler Ballistic Tip
Velocity FPS: Muzzle 2950; 100 yds 2725; 200 yards 2512
Energy Foot #'s: Muzzle 2319; 100 yds 1980; 200 yards 1681
270 Win
130 gr Nosler Ballistic Tip
Velocity FPS: Muzzle 3060; 100 yards 2838; 200 yards 2626
Energy Foot #'s: Muzzle 2704; 100 yards 2325; 200 yards 1991
What I took away from this "side by side" is that there is a 10gr difference in bullet weight, Federal does offer a new round in a 110gr Barnes TippedTripleShock in the 270 win.
I didn't go past 200 yards in the comparision since:
a) I can't see that far
b) most deer in my State of Michigan are taken from within 100 yards.
The 260 and the 270 are clearly not equal rounds....the speed and energy is greater in a 270 than in a 260, I'd have to assume that there is a bit more of a 'punch' from the 270 since it really is a 'necked down' 30.06 round. The 270 is a more versatile round but, the 260 would be a good round if you are wanting a short action round, less recoil, and solid ballistics and like to eat venison or any other medium game.