This morning went up, and shot the 500g boolit again. Used a different breech plug. The plug used today was modified to use a vent liner. The plug used today has a longer flame channel than the plug used the first time. Thus with a longer flame channel, and a larger diameter flame channel, this plug has a larger volume flame channel. My anticipation was the larger volume would absorb pressure, and so the primers wouldn't feel the same pressure today, they did the other day.













After each shot the primer fell out of the plug. Quite a difference from the other day, when a plier was required to pull the primers from that plug. Today, the primers didn't leak through, and there is no evidence of too much pressure.