xswanted
Gold $$ Contributor
Hi guys,
I purchased a B14r carbon about a month and a half ago. Been having lots of fun with it. I’ve set it up as a NRL22 rifle and hoping to make a match yet this summer. I have my own private range so I get to practice that style of shooting at home.
The gun shoots very well. I tried some different ammo and settled on Eley Club. Mainly because it shoots good and I got a great deal on a couple cases.
Problems set in after I dropped it into a KRG Bravo chassis. POI was shifting dramatically as I would shoot. Especially in the heat. Groups were still good, they’d just move 2 MOA up and left. Sometimes more.
After a lot of troubleshooting it was determined the front action screw was bottoming out on the barrel tenon threads. This was remedied by adding another washer to the KRG screw.
Problem solved. However it cooled off a bit after I fixed this.
Fast forward to today and the 92 degree weather we have and POI shift is back again.
I screwed my suppressor on the rifle just to see what would happen as it had shot well earlier in the time I’ve owned it with the can on. After removing the can I was now 4 MOA high and 3 MOA left at 50 yards after being 2 MOA high and left.
Confusion set it.
The only thing I thought of that I had t check was “I wonder if the barrel is loose” so I grabbed it with both hands and turned.
Well, the carbon tube that goes around the steel barrel turned almost with no resistance. So I kept turning and it threads off to reveal a small diameter steel barrel underneath. I’ve since learned these are “tension barrels” and this is part of how it’s built. I always thought the carbon wrapped right around the steel, maybe some do.
So…..after reading some more online I found out that Bergar recommends 124in/lbs of tension on this carbine tube.
I believe what happened to mine was as I was threading the suppressor on and off I lossened this and created my issue.
This is not a bash on Bergaras or carbon barrels. Simply a thread for anyone that has this rifle to learn from, I imagine I’m not the only one who has had an issue with this.
I’ve got the barrel tightened up and I marked some index marks on it. Looking forward to getting back at it with the gun.
They’re great rifles, just had an issue that I probably caused myself.
First pic is of the rifle all set up.
Group on the orange dot is the best I’ve shot with it, the flyer was all me.
The group on the white is the last 10 shots I fired with it after retightening the barrel. First two were a touch high and the other 8 make a nice clump. I even shot quite fast. POI had shifted up 4 MOA and right 4 MOA after being 4 MOA high and 3 MOA left prior to the barrel being tight.
Photo with my hand is me holding the carbon sheath next to the rifle after I turned it off.
Interesting stuff anyway.
I purchased a B14r carbon about a month and a half ago. Been having lots of fun with it. I’ve set it up as a NRL22 rifle and hoping to make a match yet this summer. I have my own private range so I get to practice that style of shooting at home.
The gun shoots very well. I tried some different ammo and settled on Eley Club. Mainly because it shoots good and I got a great deal on a couple cases.
Problems set in after I dropped it into a KRG Bravo chassis. POI was shifting dramatically as I would shoot. Especially in the heat. Groups were still good, they’d just move 2 MOA up and left. Sometimes more.
After a lot of troubleshooting it was determined the front action screw was bottoming out on the barrel tenon threads. This was remedied by adding another washer to the KRG screw.
Problem solved. However it cooled off a bit after I fixed this.
Fast forward to today and the 92 degree weather we have and POI shift is back again.
I screwed my suppressor on the rifle just to see what would happen as it had shot well earlier in the time I’ve owned it with the can on. After removing the can I was now 4 MOA high and 3 MOA left at 50 yards after being 2 MOA high and left.
Confusion set it.
The only thing I thought of that I had t check was “I wonder if the barrel is loose” so I grabbed it with both hands and turned.
Well, the carbon tube that goes around the steel barrel turned almost with no resistance. So I kept turning and it threads off to reveal a small diameter steel barrel underneath. I’ve since learned these are “tension barrels” and this is part of how it’s built. I always thought the carbon wrapped right around the steel, maybe some do.
So…..after reading some more online I found out that Bergar recommends 124in/lbs of tension on this carbine tube.
I believe what happened to mine was as I was threading the suppressor on and off I lossened this and created my issue.
This is not a bash on Bergaras or carbon barrels. Simply a thread for anyone that has this rifle to learn from, I imagine I’m not the only one who has had an issue with this.
I’ve got the barrel tightened up and I marked some index marks on it. Looking forward to getting back at it with the gun.
They’re great rifles, just had an issue that I probably caused myself.
First pic is of the rifle all set up.
Group on the orange dot is the best I’ve shot with it, the flyer was all me.
The group on the white is the last 10 shots I fired with it after retightening the barrel. First two were a touch high and the other 8 make a nice clump. I even shot quite fast. POI had shifted up 4 MOA and right 4 MOA after being 4 MOA high and 3 MOA left prior to the barrel being tight.
Photo with my hand is me holding the carbon sheath next to the rifle after I turned it off.
Interesting stuff anyway.
