so long as your torquer is within a few inches i would imagine you're fine. 30-80fpi is a LOT of cushion. i've actually stopped torque-wrenching my barrels, as it doesn't seem to offer any benefit. snug it up three times, line it up, put your guard on.
and as far as anti-seize goes- i just use moly-lithium grease from walmart. $1. any grease works.

