KRC
Active Member
I am loading 88 gr. Hornady ELD-M’s to extended lengths (COAL) from 2.270” up to 2.300” for my AR-15 based 224Valkyrie, using a cut-away “window” magazine. These COAL lengths have fed and fired previously with no issues.
The Rock River buffer spring and weight were replaced with a JP Power Gen2 Heavy (H2) Silent Recoil Buffer assembly. (The stock Rock River buffer weight was close to H3 weight.) This has been the only change to the rifle. Yesterday I experienced several FTF’s caused when the plastic tips of the extended COAL 88 gr. ELD’s broke off when feeding. No FTF’s on the first round, always one fed by gas cycling. On one of these FTF’s a broken tip went into the chamber and dented the shoulder of the case.
Next time out I will take the RRA buffer system with me and try again, but I am wondering what about the JP system (if that’s the culprit) has caused the issue. Cases are being ejected with reasonable force at about 4 o’clock, and are landing ~10 feet away on concrete.
Is there something like over-gassing or under-gassing that can typically cause this issue? The 224V upper has an adjustable gas block that was not adjusted yesterday.
Any insights / thoughts appreciated.
The Rock River buffer spring and weight were replaced with a JP Power Gen2 Heavy (H2) Silent Recoil Buffer assembly. (The stock Rock River buffer weight was close to H3 weight.) This has been the only change to the rifle. Yesterday I experienced several FTF’s caused when the plastic tips of the extended COAL 88 gr. ELD’s broke off when feeding. No FTF’s on the first round, always one fed by gas cycling. On one of these FTF’s a broken tip went into the chamber and dented the shoulder of the case.
Next time out I will take the RRA buffer system with me and try again, but I am wondering what about the JP system (if that’s the culprit) has caused the issue. Cases are being ejected with reasonable force at about 4 o’clock, and are landing ~10 feet away on concrete.
Is there something like over-gassing or under-gassing that can typically cause this issue? The 224V upper has an adjustable gas block that was not adjusted yesterday.
Any insights / thoughts appreciated.