New purchase full size cherokee, cz clone, comes with two 17 round mags. One mag holds 16 at best the other 15 at best. I do not believe the spring can relax enough by loading and storing as a way to correct this deficiency, as the seller says. There is certainly no way to get from 15 to 17 rounds. If break in relaxes the spring, then it also reduces the feeding force, so that failure to feed would occur. Anyone else with the same problem? The mags are stamped with a T in side a circle, no other markings. I suspect it is produced by Tangfolio.