This drawing is a major over simplfication of what I think I am trying to explain. It non-scientific and developed between conversations with Spitpatch, Grouse, and some readings from Busta posts. Lehigh Dave was also involved to a certain point as he is currently or has currently rebuilt the Knight DISC breech plug with some of these aspect in mind. He truly is scientific and can explain the reasoning better than I can ever understand.

This drawing is an attempt to explain the thoughts behind increasing the size the 'flash channel' increases the volume of blow back the channel can hold after ignition of the powder and after the burn out of the primer... This is the period of time that pressure created in the bore is looking for anyway it can find to get out... The 'flash hole' and the 'Flash channel' offer the first place for this pressure to seek relief.

This is also drawn with out the addition of a vent liner - that would come after the original 'flash hole' is burnt out. And since we are using hooter and hotter primers and hotter loads of BH - the flash is going to wear faster.

Pardon the drawing - I am a complete novice at it....