doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com 15 bore percussion double?

The brrel rib is a bit higher than the breech rib so it looks misaligned since the photo was not taken from directly above.

I will say this, the barrels ring like a church bell when hung by the hooks. I know that's not definitive proof of anything but encouraging nonetheless.

The Bolster is the protrusion that the nipple screws into. Later ML rifles have a cleanout screw,but the English did not need that with the tiny hole to blow out gases through and self clean.

The term I've heard was breech plug not bolster.

I've never heard or read about the platinum plugs as having anything to do with cleaning anything....their intended purpose was to let air be sucked in to the tighter percussion cap system for better ignition.

A breech plug screws into the rear of the barrel and the bolster-plug containing the nipple is another form of breech plug. Look in some of the ML Catalogs and you will see them displayed. Hold your hand outside of the vented bolster sometime and see how pressure comes out. Not as much as a touchhole on a flintlock, but noticible.
FINIT

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

joe, it is not likely reamers inside the bore were expanded from the outside as the adjustment is on the inwardendward.

If you could hold the gun a little closer to the screen, I could get a better look at the plug alignment...

Stallone I think you confusing the platinum vent plugs with something else.

It actually blows out a minute amount but it was thought at the time that it let the powder charge breath air for better combustion....never heard or saw in print that they cleaned anything.

Upon closer inspection SDH is correct, the rib on the plug is misaligned with the rib on the barrel. The side reinforcements around the platinum plugs also look out of alignment.

Dangerous situation or just annoying?


thanks,

Rob

I wouldn't let it worry you too much.

Hey Rob.
If the gun was taken apart to jug choke it, it looks like they just did a mediocre job on the strip and relay. That much difference shouldn't matter. The tool marks seem to line up on the bottom of the breech so it may have just been made "off". How do the inside of the tubes look?
Also, although that tang screw doesn't look right, then neither does the hammer screw on the right lock.

Tom