Installing a vent liner

[dan d]

I'm playing around with parts I have laying around (I enjoy doing things like this) I am converting a traditions percussion deer hunter into a flintlock.

I have read numerous posts & done Internet searches on this & I understand what I need to do. I will not remove the Nipple barrel, I will cut it off & surface grind it flush to the barrel (yes I work at a cnc machine shop the last 23 years) I will drill & tap for a 1/4 x 28 vent liner.

I will let you all know I understand how traditions runs the nipple barrel threads thru the breach plug & then run an angular hole to the barrel bore. I realize this might make a tempermentle gun to ignite (I'm willing to play & learn)

Now for my concern........... I realize a normal vent liner goes thru the barrel & should be ground flush inside the bore so it does not protude. A good instalation would not have any threads (male or female) being exposed to ignition of the powder. What I am trying to do will have the female threads exposed behind the vent liner, is that a concern ?

I did purchase a blind hole tap with only 1 turn of thread tapered verses a normal tap having 5 or more tapered threads before a good full thread. I will use a "normal tapered tap" to start but I will finish with a blind hole tap to minimize threads in the vent channel.

Is this correct thinking ? Or am I worrying about things that don't matter ?

Thanks,
Dan

 

[dbutch]

As long as you have access to machines..cut off the breach area re-tap the barrel for a standard breach plug and proceed...You will have a better end product ignition wise...Keep us posted on this project..Good luck!

 

[Vaino]

"Bare" threads being exposed to the hot gases won't hurt the threads covered by the liner. Unless the end of the liner is contoured to the bbl dia.,which I don't do, there will always be "bare" threads. On my first LR I didn't run the tap completely through the hole and the liner stops on the incomplete threads.....usually remove the liner when cleaning and have done so many times w/o messing up the threads. You could also use a flat bottom tap and leave a shoulder for the liner to stop on as you mentioned.

I would ensure that the remnant of the drum is very tight. If there's a long flash channel and it doesn't completely fill w/ powder, ignition won't occur. This could very likely be the case......Fred

 

[necchi]

I understand how traditions runs the nipple barrel threads thru the breach plug & then run an angular hole to the barrel bore. I realize this might make a tempermentle gun to ignite

The only hole they run is a right angle to the drum indexed from the bore;

 

[dan d]

I have studied that very pic, it's where I noted no threads or sharp edges were in the bore. I also noted the pic below from this post. http://www.muzzleloadingforum.com/fusionbb/showtopic.php?tid/243154/

I don't know if I am ready to try installing a breach plug or not, but I am going to sleep on the thought.............. Oh I just remembered why I don't want to mess with the breach plug as it is very difficult to find a replacement plug for the traditions hook breach plug.

Installing a vent liner seems pretty simple, a breach plug is a little bit more intimidating, but I understand the process of seating the plug.

All advice is appreciated,
Thanks,
Dan

 

[necchi]

Some guy's have done this instead;

Just food for thought,

 

[dan d]

Hmmmmmm...................... Thats a large plug, I remember reading somewhere it was best to use a small liner. I don't know why, but I read it here somewhere. Using a large bolt would eliminate the thread inside a thread concept of tapping the drum. Hmmmmmmmmmm..............

Thanks for all the advice !
Dan

 

[mooman76]

That's exactly what I did about 20 years ago with a CVA rifle. I couldn't find the right size/thread vent liner and there basically was no internet back then. I got a bolt and cut and drilled it. I just bought a lock (flint) that was made for the same model gun. I didn't know back then the difference in good and so-so locks back then