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+--- Thread: Problems with my rifle! (/showthread.php?tid=13251)
Problems with my rifle! - rons - 04-23-2017
The problem I am having is twofold! The gun jams with my reloads or factory ammunition. The cartridge case is pinned approximately half way up by the bolt face with the nose of the bullet nearly touching the feed ramp. This occurs at anytime whether the magazine has 10, 5 or 3 cartridges in the magazines.
I don't know if this normal or not, but the primer after discharge has flowed ( not permitting the cartridge case to stand firmly) this occurs after every shot factory or hand load. I have reduced the loading trying to stop this but it continues!
The firearm is a CORE 15, Hardcore system X3, 6.5 Grendel! It has been returned to the manufacture six (6) times. I have owned the rifle for two (2) months!
Problems with my rifle! - brassbrite - 04-23-2017
That doesn't sound good. Check headspace. Make sure you have the right bolt for the chamber. It sounds like a chamber or a gas port/block/tube issue. But I will admit I'm a newbie to the AR world.
Problems with my rifle! - A5BLASTER - 04-23-2017
Six times in two months of ownership, I would not even worrie about trying to figure it out I would demand a replacement or my money back so I could shop at a diffrent retailer.
But if you do try to continue to figure it out maybe move the upper to a diffrent lower and see if problem continues, if it does the same thing try a diffrent mag that's brand new and has never been used. If that for sure didn't work and you wanted to continue I would then check the gas block, gas tube, and look for any ad normal wear on the inside of the upper and the bcg.
But I think if it was me at this point I would demand a new replacement are my money back and move on to a new company for my needs.
Problems with my rifle! - Texas - 04-24-2017
Headspace!
Problems with my rifle! - Bwild97 - 04-24-2017
rons Wrote:The problem I am having is twofold! The gun jams with my reloads or factory ammunition. The cartridge case is pinned approximately half way up by the bolt face with the nose of the bullet nearly touching the feed ramp. This occurs at anytime whether the magazine has 10, 5 or 3 cartridges in the magazines.
I don't know if this normal or not, but the primer after discharge has flowed ( not permitting the cartridge case to stand firmly) this occurs after every shot factory or hand load. I have reduced the loading trying to stop this but it continues!
The firearm is a CORE 15, Hardcore system X3, 6.5 Grendel! It has been returned to the manufacture six (6) times. I have owned the rifle for two (2) months!
(1)This is probably caused by feed ramps in the upper and the barrel extension being mismatched. Can you provide us some pics of the extension in the upper?
(2)This occurrence is known as firing pin splash, usually it is caused by a very heavy or overly aggressive hammer spring. The firing pin strikes the primer with such a high force and velocity that the brass "splashes" from the impact area. I usually see this when I use non-magnum primers; such as the cci 400 or the Rem 6½.
Problems with my rifle! - LRRPF52 - 04-24-2017
Welcome aboard.
Your Failure To Feed malfunction with the case head halfway up the bolt face is often caused by flush ejector faces without any radius to them.
It can also be caused by under-gassing the gun, as well as over-gassing it.
More details about the malfunction will help diagnose it, mainly pics and specific info about the rifle:
Barrel length
Gas system length
buffer type and weight
recoil spring length/type
Bolt Carrier type/weight
Magazines
Ammo load, projectile, case, charge weight, or factory ammo details
Problems with my rifle! - Chrazy-Chris - 04-25-2017
Did you post in the Grendel facebook group? If that wasn't you, then there are multiple people experiencing issues similar to this with Core 15. Just wanted to point out that this manufacturer seems to be having some serious QC issues.
Problems with my rifle! - rons - 04-25-2017
I was not aware of this.
They have had the firearm since Friday. I have not heard from them since I returned it!
Problems with my rifle! - CCW - 05-13-2017
Two problems: 1. Primer cups standing proud after firing...then oversized chamber head space - or - if soot on neck, shoulder, AND body of case, then undercharged reloads.
2. Bolt face catching round case body midway up during feed cycle... then bolt short stroke due to bad magazine staging feed round off spec., or losing port-to-BCG gas pressure or undercharged reloads.
You would be going the wrong way to solve problems 1 and 2 by reducing reload powder. Weak loads starve the autoloader of the gas it needs to fully cycle the bolt. Weak loads also do not allow the case head to stretch back to the bolt face during peak chamber pressure and reseat the primer that has oozed out back.
Problems with my rifle! - rons - 05-20-2017
The gun was returned on May 13th (seventh time). This time the cartridge would either stayed chambered after firing or the cartridge case would be captured between the bolt face and the rear upper portion of the chamber area. This is with factory or reloads. The gun would fire (3) rounds or maybe (1) and it would occur again.
When the gun was returned the primers did not flow nearly as much (prior to the 13th May) but the above started!
"IF" the gun is returned I will be using benchrest primers!
Thanks for all the comments!