Question on Touch Hole Liner

[nickleback]

Hey folks; My son has a TC 50 cal. Hawkens with a Green River bbl. installed. Shoots great. My question is with the touch hole liner. I can screw it in well below the flat of the bbl. to get it snug. If I screw it in just to be even with the bbl. flat it's loose. Don't think it'd work it's way out but my question is should I screw it all the way in to be below the bbl. flat or just leave it loose and even with the bbl. flat. I've been snugging it up but haven't had the chance to see if the ignition is affected one way or another. Thanks.

Nickelback

 

[Birddog6]

I take it you are using one of the allen head vent liners ? If so it doesn't matter as it is coned with the allen head anyway, take it to snug.

 

[nickleback]

Gotcha Birddog. I'll keep it snug. And thanks.

Nickelback

 

[jbtusa]

My fear would be that if you don't snug the liner up, that it will work free and become a missile striking the person to the right.

 

[ebiggs1]

Here is the touch hole liner from my Thompson Center .50 cal Hawken. I don't see how it will screw in further than the surface of the barrel. I have the standard barrel that TC provides though.

I would say you wanted it tight, however. But I don't see how it could come out since the pan covers the bottom of the liner. Maybe it's not enough to keep a wayward liner in place!

 

[paulvallandigham]

Normally the liner should be screwed in snug. However, this won't do if the liner then sticks into the bore, and prevents the cleaning jag and patch from going past the liner to clean the breechplug.


Normally, that would never be a problem with any T/C, but I note you say you have a Green Mountain barrel installed. Does it have the same Patent style breech plug as is on the original T/C barrels? If it does,you are fine. The liner screws into and stops at the threads on the breechplug.

 

[nickleback]

It has a an allen wrench type flash hole liner. I doubt if it's original.

Nickelback

 

[Birddog6]

Some of the vent liners have a seat on the outside of the liner, such as the vent liner photos a couple of posts up. If yours is this way & you have a seat cut into the barrel, you would take the liner down to that seat. I have seen the seats cut too deep before, thus the liner sits deep in the hole rather than flush to the barrel flat.

If the vent liner hole doesn't have a seat, then the vent liner goes in til it stops at the end of the threads that were tapped. However, if it is a full thread thru, you have a problem as the liner could go in too deep & block the ignition path on the patent breech. :hmm:

The Grn. Mtn. drop-in barrel I had here a while ago was made for a T/C vent liner & it did have a seat on the liner.

I suggest ya put a smiggen of Antisieze on the vent liner hole threads before ya put the vent liner in, then just snug it in. (Not tight, just snug) This way you can easily get it back out if need be.
:thumbsup:

 

[45flint]

I'd check to see if the liner extends into the chamber when it's snug, you may need to do a little fileing

 

[nickleback]

Thanks again folks for all the info. I'll be checking it out after the season ends next week to see if it does in fact extend into the chamber. Right now when I snug it up it seems to be okay. However if I can get a bit better ignition by tinkering with it some, so much the better.

Nickelback

 

[Birddog6]

All ya have to do is measure the hole depth & the length of the vent liner. Take about 1 minute. Also, is it going into a Green Mountain or Green River barrel made for a T/C ? If it is a Green Mountain drop-in barrel, it has a patent breech, right ? The worst that can happen is you have a misfire or hangfire.