I’m using the BD “sonic weld” 15 rnd mags in monthly long range barricade events, no issues. I have older screw assembled BD and CMMG grey mags that also usually feed with no issues (had my first with a new grey CMMG that was fully loaded couple of weeks ago, likely just dirty as the first couple of rounds didn’t want to fully feed).
The older black BD mags are developing cracks, but so far I’ve been able to repair them.