When I was testing the Allegiance with my arrow, an Easton ACC weighing in at 381 gains with a 100 grain tip,

The 60 lb Allegiance at 29" shot 282 fps.
My 70 lb Allegiance at 28.5" shoots 305 fps.

You should have no problem getting 280 fps plus out of an 60 lb Allegiance with no problem....