L-10_shooter Posted November 18, 2009 Share Posted November 18, 2009 I picked up after the police this week and found several cases with this rounded neck. It appears that the brass is onced fired (still crimped), all are 05 or 06 stamp, and the primer hit is cratered. I am just curious what would cause this brass to be deformed like this. Thanks. Link to comment Share on other sites More sharing options...
Guy Neill Posted November 18, 2009 Share Posted November 18, 2009 First thought is that the chamber is not quite "right" - but it could relate to headspace (also a chamber problem, or it may be that the gas port pressure (assuming a gas operated rifle) is high and opening the bolt earlier than it should - while the chamber pressure is still fairly high. Is the neck length as it should be? If so, then it would suggest the chamber itself. If the neck length is short, it suggests the opening is early. The cratered primer suggests either high pressure or headspace. The damaged rim and extractor mark suggest high pressure. Maybe it was 5.56 ammunition fired in a 223 chamber, resulting in high pressure. Guy Link to comment Share on other sites More sharing options...
L-10_shooter Posted November 18, 2009 Author Share Posted November 18, 2009 Interesting, I only found 12 of these cases among the 250 total I picked up. I guess it came out of one rifle that might have a problem with the chamber. The cases looked alot dirtier that most of the others. Maybe the gun is really dirty? Link to comment Share on other sites More sharing options...
blkbrd Posted November 18, 2009 Share Posted November 18, 2009 Well worn SAW Link to comment Share on other sites More sharing options...
L-10_shooter Posted November 18, 2009 Author Share Posted November 18, 2009 I dont think any of the local police departments have a SAW as a patrol rifle. Link to comment Share on other sites More sharing options...
el pres Posted November 18, 2009 Share Posted November 18, 2009 You said "Police" right, rifles was probably chambered in like .243 or something ?? I dont know but it looks like maybe a really dirty gun not closing up all the way ?? You said they had a lot of blowby on them right .. Link to comment Share on other sites More sharing options...
Merlin Orr Posted November 18, 2009 Share Posted November 18, 2009 However has the rifle that brass came out of.... I hope they wear Really good safety glasses..... Link to comment Share on other sites More sharing options...
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