I've had issues with both MDT and Accurate mags in my 223.
The MDT just took a little filing to the inner front edge of the lips to allow the cartridge to properly angle up as the bolt pushes it forward.
I have not attempted to remedy the accurate mag yet, it is going to need to have the feed lips modified as well because it holds the rounds too low for the bolt to pick them up. And this is definitely not an issue with the receiver or DBM mag latch, it's most certainly the magazine.