I have had no troubles at all with my 9 round and 12 round ETS mags in my 43. I did with the seven rounds. In fact, when I loaded them with seven rounds I had seven out of eight times a failure to feed the first round. After the first round, no issues ever. But what’s the sense of having a seven round magazine if you could only put six in it? No such trouble with the nines and 12s except one of my 12 round magazine’s had one minor issue with aluminum cased ammunition the very first time it was loaded and then that was never repeated again with it or any of the four other 12 on magazines I had. Zero issues with the nine round mags.