I'm not a "expert", but I have used a product called Gorilla Grease in conjunction with the T/C teflon tape for years with good results in my Omega, Black Diamonds -as well as aKnight Disc Rifle. Usually put a dab of grease on the female threads of the barrel as well as a good coating on the plug. Also, don't torque the breech plug too tight - turn it in till it stops and then back off 1/8 turn or so. Good luck. Roscoe.