07-26-2011, 03:59 AM
Ejecting randomly is a case of several things going on, were these reloads?
The brass ejecting two feet is not a problem, ejecting random distances says that there is a possibility your gas block is leaking or loose, the rim gouges are a combination of the extractor needing a bit of tuning and the chamber pressures being possibly high making the brass stick as the bolt travels rearwards.
If you have an H3 buffer, swap it in and see if there is a difference, also look for carbon stains at the gas block. I just looked up your buffer and it is too light for the Grendel and at the lower end of function weight for the 5.56mm.
AA Stakes their gas key so that is not a problem.
Also the weight in a buffer is supposed to move in order to give an effect like a dead blow hammer, no bolt bounce.
The brass ejecting two feet is not a problem, ejecting random distances says that there is a possibility your gas block is leaking or loose, the rim gouges are a combination of the extractor needing a bit of tuning and the chamber pressures being possibly high making the brass stick as the bolt travels rearwards.
If you have an H3 buffer, swap it in and see if there is a difference, also look for carbon stains at the gas block. I just looked up your buffer and it is too light for the Grendel and at the lower end of function weight for the 5.56mm.
AA Stakes their gas key so that is not a problem.
Also the weight in a buffer is supposed to move in order to give an effect like a dead blow hammer, no bolt bounce.