Home Forums Hunting & Shooting AR and Tactical Rifles New shorty, suppressed build...weird issue

I've got a new upper I just put together. It's a Daniel Defense upper, DD 12" MFR, DD 11.5" barrel, yada, yada.

I'm running a Thunderbeast 223A on it. With factory Winchester White Box 5.56 55gr ammo it has been 100%. Zero problems.

I wanted to see how it shot some of my 69gr SMK reloads and see how accurate it actually was. Accuracy was pretty good, but it would not reset the trigger. The round would eject and chamber a new round, but the trigger would not reset.

This lower has a Timney trigger in it, but it ran 100% with my suppressed 300 Blackout upper and 100% with the Win White Box stuff, just not my reloads.

What do you guys think? Not enough pressure? Too much? Any thoughts?

Thanks,

Dan