I'm not sure I'd discount the 61.5 gr group. In my 270, I push the 150 NPT to 3040. Shot it today and averaged ~ 3050 using 60.5 gr. For the 270 anyway, velocity is right at the SAAMI listed.

Having said that, I wouldn't sweat the 'lost' 50 ft/sec but a 0.3" group is smoking <G>

Adversity doesn't build character, it reveals it.