06-25-2023, 05:34 AM
Koda Wrote:Update: today I took the new Grendel out for its maiden voyage. I loaded up a pressure ladder of 97gAbsolute Hammers over A2520 powder. I ran 13 rounds getting up to 2788fps safely.
I kept adjusting the gas screw out until it was barely holding on but could not get the bolt to lock back on the empty mag.
Im using a Geissele carbine buffer assembly. I suspect the culprit is their "Super 42" buffer spring, is "15% stronger" than a standard carbine spring.
There are many variables that come into play with short stroke or under gas issues..Adjustable gas blocks leak more gas than standard gas blocks and certain adj gas blocks can be more problematic than others..I despise the bleed off types.. If the rifle's gas system runs perfect with a properly fitting standard gas block, using an adj gas block can be problematic.. Adding heavier recoil springs or improperly fitting parts that increase friction will only add to the problem..