I recently bought a 2.0 compact with the 10-round magazines as dictated by my state. With 10 loaded in the mag, the mag easily slides in and locks when the slide is locked back, or when all bullets are spent and the slide automatically locks back. However, when the slide is forward, no round in the chamber, it is very hard to get the magazine in and lock. If I take a round out, it's easier but there is still some resistance. Is it normal to have this resistance when the slide is forwards?