Anyone else experience this with their M&P? Whether with the mini magazine, the pinky extension magazine, or even a fullsize magazine with an X-Grip, it's the same thing: If I load 10 rounds into the magazine, I have to push really hard to get it to snap into place.
If I load only 9 rounds, it goes in smooth as can be without much pressure.
If I load only 9 rounds, it goes in smooth as can be without much pressure.