I have a factory Bartlien 1/10 twist that's 24 inch length. 500 rounds down the tube, and a custom Bartlien 26inch 1/10 twist 308 match chamber. This maybe has 300 rounds down the tube.I realized I got too many barrels for it and just making room for my new 300wsm project asking 600 a piece or a package price of 1k. Shoot me a message, I can send more pics, just only grabbed a photo on the two last night before bed. These are posted on other platforms.