bisleyjohn
Pilgrim
having done that and watched it done, many times over the last 30+years. there is no way a sane person would take the time necessary to load enough powder through the nipple hole to create a danger. besides that, the ball isn'View attachment 46093t fastened in; it will blow out. I personally prefer to use a CO2 discharger, or compressed air. I make adaptors that screw into the nipple hole or vent liner threads out of bicycle tire valves.
Me too.
Tyre Valve online, two for about a quid. CO2 bicycle pump £15. Black adaptor bit of 'come in handy' steel and half an hour on the lathe.