Post by: doc623 on January 22, 2010, 01:19:20 PM
Post by: BEAVERMAN on January 22, 2010, 01:56:04 PM
Post by: doc623 on January 22, 2010, 02:00:46 PM
Where would I look for a lock and touch hole liner?
Post by: Fred on January 22, 2010, 02:46:23 PM
Post by: BEAVERMAN on January 22, 2010, 02:52:37 PM
Post by: Riley/MN on January 22, 2010, 03:07:20 PM
Quote from: "Fred"
You really don't want to be doing that you're just gonna wind up having a lot of fun, and then the next thing you know you'll have to have a custom built and then your wifes gonna make you sleep in a culvert.
Hi Fred,
:lol:
Doc, I'm doing the same thing with a CVA Mtn Rifle. I got an L&R replacement lock. Then I had my friend William Young (founder of Wahkon Bay Outfitters) make me a liner from a bras rod, I just bought a die to match the threads in the barrel. Afterwords William said " I guess I could've just found the right sized bolt and cut it down" to make the liner.
Post by: Gordon H.Kemp on January 22, 2010, 03:16:19 PM
Post by: doc623 on January 22, 2010, 03:17:40 PM
Post by: Riley/MN on January 22, 2010, 03:20:41 PM
I think I bought mine from ToW (Track of the Wolf).
http://www.trackofthewolf.com/Categorie ... tyleID=577 (http://www.trackofthewolf.com/Categories/PartList.aspx?catID=14&subID=148&styleID=577)
Post by: Two Steps on January 22, 2010, 03:24:00 PM
http://www.trackofthewolf.com/Categorie ... tyleID=577 (http://www.trackofthewolf.com/Categories/PartList.aspx?catID=14&subID=148&styleID=577)
Good luck, and welcome to the forum.
Al
Post by: Two Steps on January 22, 2010, 03:29:45 PM
Al
Post by: doc623 on January 22, 2010, 04:10:38 PM
Post by: flintlock62 on January 22, 2010, 06:41:49 PM
Quote from: "doc623"
Tks for the info so far.
Watch out for those culverts, they can get cold this time of year. Need a blanket?
Post by: IronDawg on January 23, 2010, 12:24:48 AM
Quote from: "BEAVERMAN"
you may want to send Captchee a pm here on the forum, he's the resident CVA expert!
YEP! I'll second that. Caps turned a many a bobcats in to georgeous flinters. he's the reason I just refinished a CVA and I'm seriously thinking of switching her to flint.
Post by: Captchee on January 24, 2010, 12:25:16 PM
cva changed their bolster design no for pellets but becouse of other issues. throughthe yearsthey used 4 diffrent bolsters. 3 if you leave out the snail breachfoun on short production run of kentucks.
with the drum bolster the used 3 diffrent leangh necks.all of wich go into the breech plug. which by the way is of animpoved design.
this design then makes the flash channel on all 3 go strait forwards into the center of the power charge.
what you have to find out, is wich of the 3 bolsters you have, long neck as gorden discribes.
medium nech as lance found on his. or the short neck found on most custom application today.
knowing whzt you have will then tell you how to proceed.
the short anb medium are the simplest to convert. the long neck
can be alittle fun,unless you use the neck of the bolster asa sleve, to put the new liner in.
but to answer yourquestion. yep you can convert it. but i would advise, if your serious,put an RPL lock on it. dont use one of the cva locks. in the long run you will be much happier with the preformance
Post by: Captchee on January 24, 2010, 12:27:46 PM
Post by: doc623 on January 24, 2010, 12:40:55 PM
When you say short,medium, or long boister could you give me some specifics as to length.
I could take mine out and measure it but I still need a more specific reference.
Post by: Captchee on January 24, 2010, 08:47:34 PM
Quote from: "doc623"
Thanks for the help.
When you say short,medium, or long boister could you give me some specifics as to length.
I could take mine out and measure it but I still need a more specific reference.
no not really because they change in length depending on caliber
So here is what I have done . I have a medium , a small and an original .
I don’t have any longs because I cut those off , then drill and tap for a liner .
So to show you the long , I have done a quick photo shop ..
(http://i6.photobucket.com/albums/y242/captchee/cva/CVAplugs.jpg)
CVA at that time were having some issues
So now the original .
These are found on early CVA rifles . Early 1970s
These thread in front of the breech plug ,,OR,,, split the face of the plug .
So they went to the small bolster with a bigger neck . To top it off they leaghtened the breech plug and counter drilled it ,,“IE improved breech “
This was to give the bolster more to thread into
This however did not solve the issue
So they went to a medium . This plug had a faced end that mated to the off side of the chamber in the plug
This solved some of the issues . But they took it all another step and tried the long bolster . This has a longer threaded end that goes all the way through the plug and mates to the inside of the off side of the barrel
This however did not work any better then the medium . As such you mostly will find mediums on the newer CVA rifles
So why the need . Well as I said CVA was having issues with bolsters coming out and loosening up . Im sure we all have seen bolsters on CVA rifles and pistols that look like someone has taken a pipe wrench to them ,,,, right …….
The problem wasn’t the bolster design . As you can see the first two bolster look just like what you would find on any semi or custom rifle , that employs a drum type bolster .
Mind you a design that’s been around for as long as percussion guns .
The problem lies in the way the bolster was set .
See part of the manufacturing process that Jukar was using and still uses , is that they use friction tools to set the bolsters and hydraulic applications to set the breech ..
If you notice the bolster has no flats on them like a bolster you would buy from a supply house .
well the original does . but i filed those , long ago
So once the bolsters were place , they were not as tight as they should be .
The bolster is then indexed , drilled an tapped for the nipple .
Then set aside to go on to assembly.
But because the bolster wasn’t tight . As soon as the rifle was subject to regular firing , it would work itself lose . People would then try to tighten it up . But they couldn’t because as soon as they tightened it to wher it should be , the nipple would no longer align.
If left miss aligned . The hammer would eventually loosen the bolster back up .
To top that all off , fouling would get into the threads , eventually corroding them to the point that the bolster would blow out
Hence the evolution of the longer necks .
Basically if the need was to ignite pellets in the center , which is a better way to ignite all powder , not just pellets “ hence the true thought behind the improved breech designs “
There would be no need for the longer neck bolster . A short bolster would do the very same thing when threaded into an improved breech
Post by: doc623 on February 04, 2010, 10:19:05 AM
I'll have to check mine.
Don't know the year of mfg.
Post by: doc623 on February 09, 2010, 12:23:21 PM
Stone Mountain mfg.
The bolster measures 0.540" long and 0.492" in diameter is that is any help.
Post by: Captchee on February 09, 2010, 02:06:00 PM
if not then all the past wordingf still applies
Post by: doc623 on February 09, 2010, 02:14:22 PM
What would be the best way to remove it?
Post by: Captchee on February 09, 2010, 02:25:39 PM
" see my photos of breech plugs "
then simply turn it counter clockwise .