Yes, very familar with that and what amazes me is I don't feel the 7.62x51 (U.S. version) has much of a recoil unless it's fired in a very very light weight rifle/carbine.
I just wonder had they adopted the 7x51 what it would have progressed too. Funny at the time the British felt it didn't have high enough velocity. I believe it was around a 139 grian bullet at 2800 fps. Well that's pretty in line with 7mm cartridges of today that have near the same powder capacity.