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<blockquote data-quote="cynjon" data-source="post: 2944189" data-attributes="member: 110275"><p>I had something similar happen...I have a new 22" Carbon6 prefit that I added to a Bergara B-14 action. The plan was to use factory ammo for barrel break-in, so I bought 7 boxes of factory Hornady ammo (60 of the 180 ELD-M and 80 of the 175 ELD-X). At around the 35 round point, halfway through a box of the 175's, I started getting a heavy bolt lift with every round. I had been cleaning every 5-10 round through the initial break-in, and getting zero copper out of the barrel which I was very happy with. After the bolt lift started getting heavy, I took it home and cleaned it again...no copper and a very clean barrel. I remembered reading that the early Hornady factory ammo was supposedly loaded with RL-26, and has given me issues with carbon rings in other rifles unless carefully managed (.22 Creedmoor, fast twist .243). I ran the borescope down the barrel, and sure enough, there was a ton of carbon in the neck area of the chamber. I gave that a good cleaning, and when I resumed firing the box of ammo that had given me 6 consecutive heavy bolt lifts and ejector marks, the remainder of the box fired perfectly with no pressure signs. I do believe that soft Hornady brass is a big part of the problem, and intend to switch to the ADG brass that I already have on hand once the barrel is broken in. </p><p></p><p>I'm not saying that's the issue you were seeing, but it might be worth checking out.</p></blockquote><p></p>
[QUOTE="cynjon, post: 2944189, member: 110275"] I had something similar happen...I have a new 22" Carbon6 prefit that I added to a Bergara B-14 action. The plan was to use factory ammo for barrel break-in, so I bought 7 boxes of factory Hornady ammo (60 of the 180 ELD-M and 80 of the 175 ELD-X). At around the 35 round point, halfway through a box of the 175's, I started getting a heavy bolt lift with every round. I had been cleaning every 5-10 round through the initial break-in, and getting zero copper out of the barrel which I was very happy with. After the bolt lift started getting heavy, I took it home and cleaned it again...no copper and a very clean barrel. I remembered reading that the early Hornady factory ammo was supposedly loaded with RL-26, and has given me issues with carbon rings in other rifles unless carefully managed (.22 Creedmoor, fast twist .243). I ran the borescope down the barrel, and sure enough, there was a ton of carbon in the neck area of the chamber. I gave that a good cleaning, and when I resumed firing the box of ammo that had given me 6 consecutive heavy bolt lifts and ejector marks, the remainder of the box fired perfectly with no pressure signs. I do believe that soft Hornady brass is a big part of the problem, and intend to switch to the ADG brass that I already have on hand once the barrel is broken in. I'm not saying that's the issue you were seeing, but it might be worth checking out. [/QUOTE]
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