As with most shotguns NEFs have generous headspace.
So I check the firing protrusion on all NEF guns I have
as well as all other guns of any kind. Some NEFs only protrude about .040"
and all shotguns need .060" at least.So on NEF I file off
back of breech stop so that hammer pushes the transfer bar
further forward shoving pin out further.

Also guns that have a light primer dent with some cases
I have, will indent better with Hornady cases as I measured them
with about .005" extra rim thickness. But you don't want to
put up with short firing pin protrusion when it can be fixed.Ed