Just got back from the range. Overall, I'm satisfied with the performance of this platform.
2 CZ supplied mags with wolf gold 223 - all loaded 30 rds each
2 magpul mags with monarch 223 - all loaded 30 rds each
Well, this thing shoots really good, very smooth throughout. I definitely enjoy shooting it and even with the thin , 11" barrel, the accuracy is excellent. Shooting was done at 50 yds using that PA red dot that is at this point almost 10 years old. I used the CZ mags first with no issues. Then I used the magpul mags with monarch ammo in it. Halfway through the 3rd mag (1st magpul) i got a click and no bang. I waited a bit in case it was a hang-fire and I tried ejecting the mag using the right side mag release button. It was stuck in place. I thought, that was weird. I then tried using the left mag release paddle and the mag came right out. No resistance using the paddle. I rack the bolt and the chamber was empty. So it did not pick up a round. My theory is that with cheap monarch ammo, the QC wasn't that great and I think I got an underpowered cartridge that has enough powder to cycle but not enough to push the bolt all the way back to feed another rd. If memory serves me right, this brand of ammo did the same thing with my ARs. Ejection was positive around 3:30-4:00 position on the default gas setting.
So that cluster was around 100 rds, I used up maybe 20 rds to zero and play around with iron sights (need to zero them too but forgot my tool, shot high).
I also took it apart to see if there's abnormality in wear pattern but so far everything looks good. i'm definitely glad at how clean the bolt looks compared to my ARs with similar round count.
