themalicious0ne
New member
I recently built a new 300 blackout pistol. Monday was the first day I was able to take it out due to our frigid weather here in Wisconsin. (It was actually a poor choice since the windchill took the temp down to maybe the teens)
Anyways, I had some cycling issues that I do not believe was due to the temperature. I have pretty much narrowed it down to the ammo but beyond that I don't know whether I am having gun pressure issues or a bad lot of ammo.
While at the range I purchased some armscore 147gr 300 blackout ammo. While shooting I had a double feed and several failures to eject. I actually discovered the root of one of the issues when I had to fight to get a case out of the chamber after firing and having a double feed. The issue was that a primer fell out of a spent case and jammed in the internals. After I was done shooting I found another primer rattling around inside the gun. Total, I had 3 primers, that I found, that had fallen out of my spent brass and into the gun.
Examining the spent brass, the rims on many of the casings had dings but no bulges, split cases, or punctures in the primers. I have never had primers fall out before and don't know if my gun is over pressured or if the primers on this type of ammo are just not pressed in well. If anyone has any idea please let me know your thoughts.
Overall the gun shot amazing. Not as much recoil as I expected and I shot 3- 3 shot groups into 2moa with that ammo using iron sights at 100 yards off a bench. I couldn't believe it. Shot a 3 shot string after I zeroed , checked the spotting scope and see maybe 1.5 moa and fired 2 more 3 shot groups for a total of 9 shots into 2moa. I called it good and packed it up.
Edit: gun is a PSA 8.5" 300blk with pistol gas, troy irons and thordsen cheek rest.
Anyways, I had some cycling issues that I do not believe was due to the temperature. I have pretty much narrowed it down to the ammo but beyond that I don't know whether I am having gun pressure issues or a bad lot of ammo.
While at the range I purchased some armscore 147gr 300 blackout ammo. While shooting I had a double feed and several failures to eject. I actually discovered the root of one of the issues when I had to fight to get a case out of the chamber after firing and having a double feed. The issue was that a primer fell out of a spent case and jammed in the internals. After I was done shooting I found another primer rattling around inside the gun. Total, I had 3 primers, that I found, that had fallen out of my spent brass and into the gun.
Examining the spent brass, the rims on many of the casings had dings but no bulges, split cases, or punctures in the primers. I have never had primers fall out before and don't know if my gun is over pressured or if the primers on this type of ammo are just not pressed in well. If anyone has any idea please let me know your thoughts.
Overall the gun shot amazing. Not as much recoil as I expected and I shot 3- 3 shot groups into 2moa with that ammo using iron sights at 100 yards off a bench. I couldn't believe it. Shot a 3 shot string after I zeroed , checked the spotting scope and see maybe 1.5 moa and fired 2 more 3 shot groups for a total of 9 shots into 2moa. I called it good and packed it up.
Edit: gun is a PSA 8.5" 300blk with pistol gas, troy irons and thordsen cheek rest.
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might be your "dwell time" of the case is still while it's expanded to the chamber when the bolt attempts to extract it, getting it only partially out while cycling back and stripping the next round. I'd get a "plane jane middle of the road" commercial load and load just one cartridge into the mag first and see if it also fails to successfully extract/eject. If so, probably something needs to be adjusted with the weapon would be my guess.