LiveLife
Member
OP, how frequently are you checking the powder charge weight for QC?
Let's look at some things:
Locked breech pistol will hold the brass longer in the chamber to build more pressure.
+1. I think not enough powder charge for efficient powder burn and to fully cycle the slide.It doesn't take all that much to get a bullet out of the barrel and to a close target.I am guessing it is unburned more than spilled powderWhen the bad round fired, the mouth of the case locked the slide open and was jammed into the front of the ejection port, and that's how powder spilled inside the gun, and some onto my hand.
Let's look at some things:
- Primer ignition alone will not push a bullet out of the barrel
- Poor neck tension may actually INCREASE chamber pressure as bullet nose slamming on the feed ramp could seat the bullet deeper or even compress powder charge - https://www.thehighroad.org/index.p...nd-bullet-setback.830072/page-4#post-10926900
- Unburnt powder granules are usually from insufficient chamber pressure/inefficient powder burn
Sounds like OP's problem.lightly loaded 9mm, using Power Pistol in a 16" AR ... inside the barrel was some unburned powder, not just a few flakes, but what looked to be about 1/4 of the total charge. Happened several times. The bullet always made it out, though. When I upped the charge, the problem went away. I chalked it up to not enough pressure for a complete burn
Blowback carbine will pull brass away from chamber and lose pressure as soon as recoil overcomes the mass of bolt/buffer and recoil spring tension.The pistols stay locked for a split second compared to the blowback AR.Funny thing, though, is that I used that same load in my pistols without a problem.
Locked breech pistol will hold the brass longer in the chamber to build more pressure.