It has something to do with the cycle of function specific to the weapon. I have heard different theories, but nothing beyond what I consider to be speculation.
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Ive only had that happen once, and it was with Black Hills blue box 69 SMK's. Just brass that has been shot too much, and can happen with reloads.
Need to get one of those broken case extractors.
That is pretty interesting, I've never heard it before.
I had one stuck case down at BW a few weeks back that I was able to clear by mortaring the gun. This was an LE6920, so I assume the overall operation of the gun (compared to an 11.5") was mild enough that it tried and failed to pull out the case, vs. trying and ripping it in half.
I was told that the cartridge cases that had been fired through a SAW would not be acceptable for reloads due to the fact that headspace specification of that weapon caused excessive stretch in the web of the case as compared to the M16 series.Once resized the brass at times will clearly indicate a ringed web on the exterior.
It was recommended to inspect all the military spent cases inside and out for a ringed web,particularly after resize.High tech tool indicated to use at the time was a straightened paper clip to check the inside web of the case when going through bulk surplus brass..
Other warning was to look for deformed cartridge case rims.
ill bite. how many?
Most likely...
http://www.dtic.mil/ndia/2006smallarms/fischer.pdf
Note longitudinal stretching/head space...worn , out of spec M249s - not uncommon
There's a little more to it, but here's something for those interested to research.
Seen this often before...