Quote Originally Posted by airgunnut View Post
I know some one who drilled 4 holes in the loading cap of his cylinder flask then coverd the holes with gaffer tape, his idea was if a spark somehow got into the flask the pressure build up as the powder goes up in smoke will exit via the weakest point, this been the gaffer tape covering the holes. Good idea but I think the pressure build up will be so fast that the cylinder flask will blow up anyway but the holes will limit the size of the inevitable bang.

When loading my muzzle loaders I use paper cases made from perming papers, one of the best ideas for muzzle loaders ever (admittedly I don't have any flint locks)
That would not make any difference. When blackpowder explodes it is virtually instantaneous. It is not a gradual build up of pressure.
If I remember correctly the detonation velocity of blackpowder is 900 - 950fps.