Mag Drops

[1dog1]

Good Day fellow shooters. I have a CZ75 SP01 9mm and last night during a USPSA practice session a couple of my magazines would drop 1/8" after a reload. No matter how many times I slapped and racked it the magazine would not engage. ANY THOUGHTS?? Keep in mind I have owned the gun for over a year and never had these issues before.

Thanks

[2morechains]

Need more information.  When you say the mag would not engage, are you saying that it won't insert far enough into the gun to allow the slide to strip a round and chamber it? 

[fastlane604]

Are these the same mags that you have always used?

[MontanaCZ]

Which magazines and how many rounds are in them?
Issues during initial loading, or just on doing a reload?  Slide open or closed?

[1dog1]

Good morning and thank you for the feed back. I discovered the issue, the new base pad I purchased was the wrong size (in depth). Everything is good to go.

[2morechains]

Good deal.  Most times I go back to the last modification I made to see if that is the root of the problem...  Glad you figured it out.