I'm just guessing that the Springfield mags are made by Mec-Gar (really don't know). If so, I have had intermittent problems with the 15-rd'ers. Mostly when I got down to the last round or two. Never a hitch with the 13's. Did some searching and found a lot of other people having issues with 15's that they didn't with 13's. Once I lost confidence, I just can't carry them.I'm having a hard time finding 15 rd blued mags. My biggest gripe is only giving you 1 mag with the gun. I think that's kinda crap of them
Now, these were bought at least 10 years ago. I'll probably buy a couple new ones (maybe marked Springfield?), and hope!