Thats a tight seal!
So to keep from going nuts " actually started to shake today lol" i loaded up the Wolf with 60gr BH209, .018 patch and .490 round balls and went shooting.
After the shot i normally leave the spent primer in the plug to keep the powder dust from dirtying up the frame. Works great with sabots and conicals.
not so much with round balls!
I pushed a ball down and left go of my range rod and the pressure shot the ball back up off the powder charge and the range rod darn near knocked me under the chin!
I pushed it back down and it held, broke the action open to install a new primer and it shot the primer out of the BP and the air pressure went,, pssssst!
THAT is how tight the seal is now after adjusting the firing pin bushing correctly!
Should be water tight too i would think.