Quote Originally Posted by tacfoley View Post
'Flash-over', the reported multiple discharge phenomenum, does not take place from the front of the cylinder, where the ball is actually a swaged-in fit to the chamber, but from the back, where loose-fitting caps on worn-out or distorted nipples allow the flash to transit from one nipple to the other, and setting off neighbouring chambers.

Exciting to watch, underwear-filling to experience personally, it is something that can be avoided altogether by ensuring that the caps are a good tight fit, and that the nipples are not worn or distorted. Note that it CAN happen if you distort the caps by pinching them oval to make them fit - so get the right-size caps to fit your perfect nipples.

tac
As tac says do not squeeze nipples oooooh eeerrrr missus to fit ( I know it's caps but nipples sound so much better lol )
And to think it was once suggested as a good tip to squeeze the caps to stop them falling off under recoil too