It would not surprise me at all. Quick side note. Was at the marksman in seattle area a year or so a go. I wanted to pick up p220 factory mags as all i had was the orginal two and a bunch of pro mags. (who makes the factory mag for sig's p220). I had had no end of trouble with 230 Grn JHP out of my Pro mags. Did the full clean and oil etc etc. I decided to do the same with factory mags for shitz and giggles. It is then that i noticed a single difference on the mags. The mag follower has a small metal tab on it. this tab keeps it from causing problems when shooting certain ammo after a lot of rounds.
you can see the tab resting on the shelf of the plastic follower. I argued that the tab was an integral part of the magazine and that promags would not function as well with certain JHP ammo's. the guy behind the counter carries a p220 and had used promags for years but carried 185grn +P's He gets a box of 230's to prove me wrong and prove his point that the 20 dollar savings was worth it in the pro mag. 5 min later i walked out with all five of their factory p220 mags and the 1 ten rounder they had. He was pissed. It was a 4week wait to get the factory mags from sig.
While they may be the same manufacture, often there are slight specific differences that one should take close note of. Test with all types of ammo, and then use it in your daily carry.