While it may work most of the time, we found that 30 was not totally reliable, but 28 was. If the mags were a hair deeper, 30 probably would be no issue.
Regardless I still don't see what the clamor over 1-2 missing rounds is. Its proven to be more reliable. But then again if you don't really care if your mag seats fully EASILY, and don't care if the first round strips clean or not, then have at it.
And I've never worried about feed lip issues....
