I don't know about the use of the hole to clean the flash chanel on a gun with blowout disks. I have seen(somewhere) a fix for caplock rifles, where a hole was drilled into the bolster and supposedly ignition was improved.
Yes, the hole was pointed AWAY from the shooter.
I don't know if it sucked or blew.

Couldn't resist
Tom

Last edited by Tom Hall; 01/29/12 06:41 PM.

Carbonation without fermentation is tyranny