More Carbon Barrel Joys
- Thread starter INTJ
- Start date
Dusty Stevens
Shiner
Ive never seen one that didnt have a shoulder on both ends the carbon was wrapped up against
Where is the steel shoulder the carbon was wrapped up to? Looks like it was ground off
Hmm. Wonder if the "shoulder" screws off and the cf is under tension by that "nut". A tensioned bbl. There's a recent thread on here regarding them. I've actually thought about doing something similar. Turn a blank down, wrap it and using a jam nut at the muzzle end to tension it. I'm wondering if that's what they've done on this bbl. Maybe I'll use LH threads. Lol!
I'm just guessing that it got too hot working on it.
I'm just guessing that it got too hot working on it.
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paperpuncher
Gold $$ Contributor
You may be onto something here The lower thread looks as though it may be a LH thread can’t tell for sure. It certainly looks as if it was set up to tension on a cf tube
I didn't pay much attention but it does look left handed.
That looks like some kind of post tension barrel? Probably not the correct terminology.
It's a Benchmark. They are not a tensioned barrel. They do have a .5 or .6" chunk of steel on the end of the carbon that the brake shoulders against. The also have a 5/8" diameter extension that is shortened and threaded.
In the pic, my threads are on the end. The threads next to the carbon are left handed and are what holds the steel barrel end in place.
I used red Loctite when I screwed the barrel end back on. Benchmark says if it doesn't shoot that they will take care of it.
In the pic, my threads are on the end. The threads next to the carbon are left handed and are what holds the steel barrel end in place.
I used red Loctite when I screwed the barrel end back on. Benchmark says if it doesn't shoot that they will take care of it.
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What about the chambering threading of the muzzle installation of the rifle slight break in if I need to find out if it’s going to shoot I would send it back and get a new barrel right now before I invested the rest of the money
We will know in a few rounds if this barrel will shoot.
I have a Rock Creek CF that doesn’t have one on the muzzle. My muzzle device just butts up to CF. Think the Paradigm and Peterson’s are both this way.
3Sigma
Silver $$ Contributor
The presence of a compression nut is no surprise. It's either that or epoxy it in place. But, if you don't put that CF tube in compression (and the barrel in tension), it wont do much IMHO. CF tubing is extremely strong in compression and this is one of the key attributes I assumed was being leveraged in the design. Turn a skinny barrel, slide a prefabricated tube over it, compression nut in place.
The only other way I can think of getting the weave and strands in the right direction (you want the strands running as parallel to the bore axis as possible) is if the CF is woven directly onto the barrel then resin impregnated and baked. This would make a $1200 barrel $12,000.
The only other way I can think of getting the weave and strands in the right direction (you want the strands running as parallel to the bore axis as possible) is if the CF is woven directly onto the barrel then resin impregnated and baked. This would make a $1200 barrel $12,000.
Several smiths I do work for, will not chamber anymore carbon fiber barrels due to issues like this. The winds of change are blowing again.
Paul
Paul
Dusty Stevens
Shiner
This is exactly how proof does it. Its not a prefab tube its wound directly on there
I was gonna try the pre fab tube route on one but haven't done it yet. I came up with a real nice stock, AA or maybe low end AAA walnut and an action. The barrel channel is for a #5 Shilen contour and that's just too heavy for a hunting rifle, to me. That and the stock is pretty heavy too. Just too heavy of a gun altogether, to me. So, I either live with more gap in the bbl channel than I like, on such a nice gun, or..carbon fiber it. I'm not what I'd call experienced in laying up carbon fiber so a pre fab straight tube is appealing to try. My plan is to simply turn the bbl down to the id and od of the cf tube somewhere in front of the chamber, thread the end of the bbl for a "compression nut" with the same od as the tube..slide the tube over the bbl and fill with epoxy and cap it, basically. I had no idea that some are made like that. I'm just thinking of a way that would work without having to lay up the carbon fiber and vacuum it down, etc. I still might give it a try but I'm in no hurry. My biggest concern with using the gun as is, is if it takes a hit on the forearm with such a gap, there'd be nothing to keep it from breaking the stock. Right now, it has a #4 on it I chambered in 7mm08. I could turn it down enough to do all this without hurting accuracy enough or at all, to hurt a hunting rifle and fill the bbl channel while lightening the gun a fair amount. The stock is an Accurate Innovations. They have a full length aluminum bedding block in them and a titanium pin in the wrist. Real ebony tip and cap..nice stock and they are not cheap. I got a deal on it and will live with it one way or the other.
Dusty Stevens
Shiner
Ag composites makes an actual carbon fiber stock with a sporter forend and rem varmint barrel channel. They work perfect with the proof barrels. Real carbon fiber is cured in an acetylene chamber under heat. Heres my personal CF hunting rifle brett painted. Its a proof barrel and AG composites stock
Pretty nice looking rifle Dusty. What's it weigh?
Dusty Stevens
Shiner
5.5 or so after the paint job and recoil pad install
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