You can use the grease used for black powder breech plugs if you have that. Never heard anything about graphite, what I did hear was some anti seize has crushed aluminum in it and it can cause the nut to gald.
Don’t use a crush washer if it says not to, Smith Vortex’s are the same way, no washer. I use red loctite and just snug a regular FH up with a crush washer. If it needs to be timed, I crush it then loosen it off so it times without much torque. I believe that was an AMU tip I picked up from Rost I think.
