touch hole liner

[brushbuster]

gettinc close to finishing my first flinter from sitting fox. this gun has a green mountain barrel in .45 cal.when installing the touch hole i noticed the liner potrudes approximately 1/32" .should i file this flat? if so should i deepen the screwdriver slot first and with what? ::

 

[robinghewitt]

The liner is usually the thinnest part of the barrel. Filing it will make it even thinner ::

 

If the shoulder is seated properly you file the liner flat. Yes it is the thinest part of your barrel. It is also a hole in your barrel. It is planned that way. You need not worry unless the amount filed off opens the diameter of the touch hole beyond specs and that is not usually going to happen with a comercial liner.

In most cases you will have to file the liner flush for the lock to properly butt against the barrel flat to seal the area of the lick mortise.

:thumbsup:

 

[Zonie]

As Ghost said, the end of the liner should be flush with the side flat of the barrel to permit the lock to fit right up to the side of the barrel.

As you can take the liner out now, you can see down from the inside and determine the depth of the inside counterbore.
A little math will tell you what the length of the touch hole is, so you can figure out what it will be after you remove the necessary amount of material.

As to whether you recut the screw driver slot or not, that's up to you. If you use a narrow hack saw blade, the kerf (saw cut width) will be less than the touch hole diameter so it probably won't hurt anything.
I might say here that some people don't remove the liner from their guns and feel the presence of a screwdriver slot detracts from the appearance of the rifle.

Before you install the liner for the last time, be sure to trim it's length so that it does NOT protrude inside the bore of the gun.
If it does stick into the bore, you will have mis-fires. I speak from personal experiance on this.

While your frinkeling with this liner, don't forget to drill out the touch hole to 1/16 (.0625) to 5/64 (.0781) diameter.
I would lean towards the 1/16 on guns .45 cal or less and 5/64 on .50 cal or larger.
Enlarging this hole will make ignition almost instantaneous.

 

[Dave Poss]

Before you install the liner for the last time, be sure to trim it's length so that it does NOT protrude inside the bore of the gun.
If it does stick into the bore, you will have mis-fires. I speak from personal experiance on this.

Another problem with my ol'flinter....I THOUGHT I had measured "dead-on" with my new liner-a cleaning jag with a patch did not hang up, so I filed off the screw slot. But, after a day of shooting, I used a scrapper and I was hitting (just Barely) the liner. :what: Is there a way, other than removal and putting in a new liner or removing the breech plug to "file" off the intrusion without damaging the rifleing ? I can live with it as is but it's just another irritation to me about my ineptness! :boohoo: thanks again

 

Long knife, it sounds as if your liner is located with the full diameter ahead of the breechplug. If it is you might be able to remove the plug and use a dremil to flush the liner with the bore.

I install mine with the flash hole even with the plug face, placing a bit less than half of the liner diameter into the breech plug area.

If the liner protrudes into the breechplug it has the plug locked in place and you will have to remove the liner to remove the plug anyway, so why remove the plug? Just get out the eazy out and replace the liner.

It's the little stuff that gets you! This is why the pro builders make the bigh bucks! It's not their carving or engraving. They don't forget about these little details as they build. That leaves them time to carve and engrave.

:relax:

Don't get down on yourself. The pros make mistakes too, they just know how to repair them better than us! This was a good one! You were the only person in the world that would have ever known it was there. When I make one people usually get to point and laugh at it!

:crackup:

 

[LSU TIGER]

Longknife, why not remove the breech plug and dress it down with a Dremel set on VERY LOW speed? :m2c:

 

It appears that the question has been answered. However, regarding whether or not to leave the slot, if you choose to leave the slot and it is not horizontal, where the slot touches the pan you will get gas cutting.

Cody