I loaded developed a 165gr Speer bullet and took the rifle hunting last month. Two totally different experiences were had.
During load development I used Pmags both 10 and 25 round varieties but only loaded with single shots or 4-5 rounds depending on if I was shooting for groups or tuning the adjustable gas block. No issues experienced and the rifle was VERY accurate.
I took these developed loads and for the first time loaded up a full 25 rounds for a night hunt. Shoot/Jam Shoot/Shoot/Jam and so on the whole night.
Iím talking ugly jams here - rounds playing twister inside the action, pigs running everywhere getting free pass after free pass.
I assumed maybe the Sprinco orange spring was too heavy and so I switched it out with an A2 stock and full rifle buffer and spring.
Tested it again with the 10 round pmag that had done so well during load development.
Tried rapid fire
Same, these are all with my suppressor on the barrel by the way.
I bagged the gun and became frustrated, thought about it another week, pulled the gas block off , carbon indicates it was centered just fine, put it back.
Read elsewhere in another thread that I posted on this setup where a guy found his bolt was dragging on the top of the feed lips or cartridges in queue simulating short stroke jams.
His solution was to switch to Pmags
Well I figured Iíd investigate that further and lo and behold - we got a possible serious problem with these $ 160.00 reciever sets.
I would say at this point - STEER CLEAR of these reciever sets
I smell Bacon