I am also experiencing the same thing. I am keeping all the mags fully loaded with 15 rounds and hope this fixes the issue.I recently purchased a P229 Legion 9mm with the 3 included 15 rnd mags. I picked up 3 extra mags later. All of the mags are the "updated" design marked "P229-1." I'll be darned if I can get that 15th round loaded in them, even using an Uplula. Any thoughts on this?
The six mags that I have that all seem to max out at 14 appear like the right one in your picture. Have you tried the load 'em and let 'em sit for a few days idea to compress the spring? I haven't yet. I'm hoping that will remedy the problem.I have three 229s and I have had the same problem with several of my spare mags. In the picture are two different P229-1 mags. The one on the left says P229-1 "Made in Italy" and the one not the right does not mention Italy. The ones with the base plate button like the mag not the left all hold 15 rounds and all my mags that look like the one on the right will only hold 14 rounds.