Recent content by rdbeer

I found these images that show the differences on blog.westernpowders.com

Interesting to know, thanks. Trying to find more info on the NATO chamber, all I can find so far is that the max overall length spec on the cartridge is 2.26"/57.4mm

Thanks for the education on the gas system -- I'm really interested to learn this kind of detail about the platform. I ended cleaning everything with mineral spirits and oiling/greasing pretty much as you described. Will see how it works next time I shoot.

I have this: M&P 15 Sport II | Smith & Wesson Armornite (hardened nitrite) finish on interior & exterior of barrel. The barrel is stamped 5.56 NATO as I said. I'm thinking the problem may have been a brittle case rim as Bullet Bob suggested. Or maybe too much factory lube in the chamber? I...

Yep, o-ring was there. This was my first 80 rounds out of a new rifle. I'll get a chamber brush - thanks for the advice.

It looked pretty wet... but I re-lubed yesterday to make sure. The barrel on mine is marked 5.56 NATO, hopefully the chamber is sized right, but maybe the cheap Tula ammo is not consistent.

Yesterday I did completely disassemble the bolt and the extractor looks intact. So will assume it was a fluke for now, and try again.

Factory Tula ammo. The stuck case did have part of the rim broken off, but not sure if that happened before or after was trying to clear it out.

Appreciate your reply. It happened with the factory metal magazine (I have the 10 round state compliant one). And it wasn't wasn't a double feed - the fired round did not extract, and then the next round got pushed on top of it.

I'll have a look at the bolt and extractor. Thanks for the video link.

Just got a new Sport II, but had a failure to extract after only about 50 rounds. The next round jammed up against it. No way to get it out, needed a cleaning rod to clear the malfunction. Feeling pretty sour about it, have many rifles and never had this serious of a malfunction. Should I send...