I've had some teething problems with my 270AR. The first 100 rounds I used to break-in the rife were fired with few issues except for a couple of FTE around the 50 round mark. A little lube fixed that problem. The problem started on my second batch with several ladder test of Leverevolution and CTE. Which one I'm not sure since I had problems over several range sessions, I drop the ammo box at one point mixing the ammo up and due to the passage of time before I sat down today and pulled the bolt to inspect. I do know my COL was 2.65.
When I pulled the bolt, I was surprised to see lip of the extractor missing. Not sure if it is due to hot rounds or a defective extractor. Easy problem to fix but curious about what caused the failure. I was also surprised to see a build of carbon on the boat tail which I thought was odd since I've only fires slightly more that 100 round fired with the bolt and barrel.
Thoughts? Hot ammo or defective extractor? Here's some photos. The photo with the cases, the case on the upper row is the last round fired and that was stuck in chamber. The extractor was already sheared off or had broken by that point since the case wouldn't extract and need a rod to remove. The lower row is for the fired cases. The brass looks really beat up on some of those case. Primers are starting to flatten.
Here's a photo of the bolt and bad extractor (top) plus the one I used to replace it with. Carbon already scraped off the bolt tail in this photo:
Here's a photo of the top of the bolt:
When I pulled the bolt, I was surprised to see lip of the extractor missing. Not sure if it is due to hot rounds or a defective extractor. Easy problem to fix but curious about what caused the failure. I was also surprised to see a build of carbon on the boat tail which I thought was odd since I've only fires slightly more that 100 round fired with the bolt and barrel.
Thoughts? Hot ammo or defective extractor? Here's some photos. The photo with the cases, the case on the upper row is the last round fired and that was stuck in chamber. The extractor was already sheared off or had broken by that point since the case wouldn't extract and need a rod to remove. The lower row is for the fired cases. The brass looks really beat up on some of those case. Primers are starting to flatten.
Here's a photo of the bolt and bad extractor (top) plus the one I used to replace it with. Carbon already scraped off the bolt tail in this photo:
Here's a photo of the top of the bolt: