11-09-2019, 04:40 PM
I have 2 of their barrels, one on in 6mm and one in 6.5. The chamber in BOTH of them are ~0.012" too long using the 0.134" bolts that came with them. I didn't identify the problem until I began getting case separations. Since then, I have adjusted my die(s) to bump the shoulders back 0.003". I find it curious that the seem to have made a conscious decision to provide these deep chambers in that they are proponents of the type II bolts.
In that I am in the process of building a 28" 6mm upper using an X-Caliber barrel and matching bolt, I will probably change to a type I (0.124") bolt in the 6 once I have gone through my existing brass inventory.
I'm not certain what I will do with the 6.5, having identified the problem, I trashed all of my old brass and started anew with a batch of Lapua brass. I have cut the 22" barrel down to 20" in order to compete in the NRA Tactical Prone matches. The rifle shoots ~1/2 MOA as is and the bolt is one that they touted as a stronger design due a thicker root than the original AR bolts. I'll see what kind of life I get out of this lot of brass.
In that I am in the process of building a 28" 6mm upper using an X-Caliber barrel and matching bolt, I will probably change to a type I (0.124") bolt in the 6 once I have gone through my existing brass inventory.
I'm not certain what I will do with the 6.5, having identified the problem, I trashed all of my old brass and started anew with a batch of Lapua brass. I have cut the 22" barrel down to 20" in order to compete in the NRA Tactical Prone matches. The rifle shoots ~1/2 MOA as is and the bolt is one that they touted as a stronger design due a thicker root than the original AR bolts. I'll see what kind of life I get out of this lot of brass.