Have You Seen

[frankrede]

Its not offtopic, Its talking about igniters in the endcap just like the O.P.
Lets say you do have it in the endcap, you could use it to shoulder fire just put your shoulder into it.

Pull back. Bang.

[frankrede]

Bbqs in the end cap are bad news.
Once while ramming a spong down my barrel the igniter went off and there must had some fumes left because it launched my pipe out and almost took my hand with it.

You could also put your ammo in first, in stead of the propane, or whatever you use.

Sometimes after some firings, usually after a bad shot, there is still some vapors in the chamber.