Jeager start and a question

[Doc Arroyo]

Here is a couple of pictures of the newest project. A friend bought these components to build before his first daughter was born. Now he would really like to shoot it before she graduates high school, so it moved to my shop. :haha:

18 years ago when he bought this, a guy installed the breech plug with a Nock patent breech, and drilled the touch hole. :cursing: So try as i might, I missed with the inletting of the lock, and the touch hole is 1/32" to 1/16" low. Will this affwct performance much, or could enlarging the touch hole provide a "fix"?

 

[Erzulis boat]

If the touchhole is a bit low, sometimes a Dremel can be used to lower the "trough" on the pan.
I always install the vent or drum on a barrel BEFORE lock installation. This is so critical to fast and efficient ignition, that fitting a vent to lock location is almost always a compromise that puts the vent in a place that does not maximize efficiency.
In my opinion, I would grind the pan versus messing with the vent, especially on a "Nock" style system.

 

[Mike Brooks]

If it doesn't have a vent liner in it yet just redrill the hole for the vent liner on a milling machine with an end mill alittle high to where you need it. If it already has a liner you might install a larger liner using the end mill a little higher too.

 

[Doc Arroyo]

I always install the vent or drum on a barrel BEFORE lock installation. This is so critical to fast and efficient ignition, that fitting a vent to lock location is almost always a compromise that puts the vent in a place that does not maximize efficiency.

Wow. That is exactly opposite of what I have found. I think I will stick with drilling the touch hole last.

But I may deepen the pan on this one, thanks.

 

[Doc Arroyo]

Mike-
The Nock breech includes a liner. And a milling machine is not an option. Table saw, drill press, or hand tools. That is what I got. :thumbsup:

 

[Mike Brooks]

Mike-
The Nock breech includes a liner. And a milling machine is not an option. Table saw, drill press, or hand tools. That is what I got. :thumbsup:

well then you got some trouble. Looks like a deeper pan is the option of choice on this one.
I always drill for the liner the last thing on a gun. I always punch were I want it to go on the barrel when I start building and locate my lock in reference to that punch mark.

 

[Slenk]

You could put in a blank undrilled liner and then drill where you need to .

 

[hootal]

I recommend you deepen the pan. I would deepen it the fartherest point away from the liner,as opposed to directly below it. So the sparks can jump and fly over into the hole better.
Hoot Al

 

[Birddog6]

My first thought is to raise the barrel, if you have not filed down the wood at the top at the breech/tang area. Raise it & put some Micro-bed the breech/tang & out to about the first foot of the barrel from the breech & bring it to the correct height.

If this is not an option, then I would try to take out some meat of the bottom of the pan with a dremel tool. I have deepened allot of pans & it has always worked out OK. Be SURE you take careful measurement of the pan depth vs. barrel flat or you could deepen it past the flat in some instances, then you will be welding a pan up & doing it over ! :redface: (Yes, been there done that too!)

Now allot of this depends on the barrel size too. If it is a large caliber you have lots of room to play, however on a small bore you don't have all that much room to play, as the barrel flat is not as wide usually.

But unless it is Really low, most of the time you can just deepen the pan, drill out the vent to a 1/16" hole & cone the vent liner inside & ever so slightly on the outside & use 1/2 pan of powder & it will work fine.....
(On calibers under .40 cal I use a 1/16" hole, on larger than .40 cal I use a 5/64" dia vent hole.) :thumbsup: