Glock 30 Round Magazine Problem

[bloodandgutsmurphy]

I purchased two 30 round 9mm Glock magazines. I loaded the first 17 rounds without any issue, but when I tried to load the 18th round the mag would not take it. I tried to use the loading tool and the spring would not move anymore at all. Has anyone else had this problem? Any solution?
Thanks

 

[leftsock]

If they're Korean or some aftermarket made magazines, you might need to disassemble the magazine and inspect the inside for extra flashing that would get in the way of the spring and follower.

Also, check out getting some nice Wolff springs for those magazine. They feel much better than the ones that come with the mags, in my experience.
Springs for GLOCK ® Semi-Auto Pistols

Be careful though, after you get your magazines to function properly, you might end up losing them in a tragic boating accident like I did.