I don't have any direct experience with that weapon. However, read your hunting regulations very carefully. Many states have a requirement for only original style caps, not allowing the 209 shotgun primer.
Another reg to watch for is the exposed primer/cap requirement. This caught a number of new BP hunters who bought inline rifles with covered/protected caps.
I;ve read a number of good reports on the NEF and only a few negatives. Those negatives seemed, to me, to be reaching for an excuse to bad mouth, rather than giving an objective review of the weapon.
Enjoy shooting dirty. It's a blast.