Vent liner

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a little trick i have in my little trick bag is to run a jag that is tight to the bore, down to the vent hole, with the liner out.
then i either measure in to the jag from the flat or screw the vent in to touch the jag and get my measurement that way.
of course it doesn't work with a patent breech.
 
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Hey Cap popper sorry you had to go through that. WOW. You might check your pedersoli. I would bet it has a patent breech. Just about all pedersoli rifles do. You can fix this two ways. The first is to remove the liner and shine a light into the threaded hole where the liner came out of and take a caliper and extend the rod end of the caliper down to where it is just shy of the chamber opening. Then put one of the jaws of the caliper against the face of your liner and the other jaw against the threads. This will tell you how long your liner should be. Method two would be to shorten it a little at a time until your jag and patch do not hang up. Once again sorry you had to go through that. Pioneer flinter.
It actually does not have a patent breech. The liner would probably be about the right length if it did. Shortening it is easy I just wanted to be sure there wasn't some reason I shouldn't.
 
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Very few of us will fire a flintlock so much that the vent hole burns out. The purpose of a vent liner is to increase the uniformity of ignition. Plus it is a great aid in cleaning.
I prefer them on my flintlocks simply because they aid ignition. Much faster in my opinion using a vent liner. I have shot many times without a liner using a simple vent hole. In fact a real discussion could take place about which vent liner is best. I prefer the ones that are coned on the inside. These are my opinions subject to disagreement. Lol
 
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T
So just cause I'm thinking about it right now..... I've got a .32 cal pedersoli Kentucky I built and the vent liner protrudes into the breech. So I have to remove it to clean the gun. Is this normal? Would I be in the wrong to find a way to blue the protruding part and then file or cut it down? Lathe is out of commission at the moment. I don't think I could chuck it in the 3 jaw and we don't have a collet head at home. I don't really like taking it out every time I shoot it.
Take it out and file off the excess and no more. You should be fine.
 

hanshi

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I've had a rifle with a liner that protruded into the bore, snagging cleaning patches. I removed the liner and quickly ground off enough to get it to fit flush with the bore wall. While it was out I enlarged the cone; that one step of enlarging the cone helps reliability.
 
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Take it out measure to find out how much needs to come off and grind or file it off. Simple fix. Run a tight patch down the bore or a breech plug scraper and see if it still catches if it does do it again. Just don't get to agressive and remove too much.
 
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The threads being removed aren’t holding anything now.
How would removing them make it “unsafe”?
I believe what he was trying to communicate was not about the unused threads protruding into the bore but the fact of removing too much of the threads into the barrel wall not leaving enough thread engagement making a possible unsafe condition. Sounded reasonable to me. Not to speak for him but that was my interpretation.
James
 
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I had a Pedersoli Mortimer 12 ga , the vent liner burnt out in about 15 shots and the flame was so intense it melted the end off the flint . I replaced it with a White lightening liner , no more problems . A mate had the same problem with a .54 Pedersoli Mortimer rifle .
 

M. De Land

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So just cause I'm thinking about it right now..... I've got a .32 cal pedersoli Kentucky I built and the vent liner protrudes into the breech. So I have to remove it to clean the gun. Is this normal? Would I be in the wrong to find a way to blue the protruding part and then file or cut it down? Lathe is out of commission at the moment. I don't think I could chuck it in the 3 jaw and we don't have a collet head at home. I don't really like taking it out every time I shoot it.
I machine my own of A-2 and contour the inside to match the orbit of the groove diameter bore. This makes them flush with the bore around the clock with no corners for fouling to cake on as happens when the liner is left flat. I also like to funnel the exterior instead of the interior to vector in pan flash and discourage chamber pressure escapement outward.
When I fit the breech plug I like to ream the bore to groove diameter just ahead of the breech plug to make it smooth bore for about a half inch. It makes cleaning the plug face much easier with the rifling gone.
 

Loyalist Dave

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I believe what he was trying to communicate was not about the unused threads protruding into the bore but the fact of removing too much of the threads into the barrel wall not leaving enough thread engagement making a possible unsafe condition. Sounded reasonable to me. Not to speak for him but that was my interpretation.
James
Ya, taking it flush is one thing but going too far past "flush" might give you too little metal in the liner to contain the pressure was what I understood it to mean.

It would be rather spectacular for the poor guy standing off to the side of the touch hole if the touch hole liner gave way... plus the shooting holding the rifle and the lock being in the way a bit... 😳

LD
 
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