I have a Waffenfabrik Peters Stahl .22 conversion unit for the Browning 9mm Hi Power Pistol, it is labeled PSW 3. It is very well made with excellent sights and the slide replaces the 9mm slide with a slide with .22 LR barrel and includes a .22 LR magazine. It was given to me as a gift and came with no instructions but the fitting is very simple and straightforward. However when I started shooting it I used various brands of .22 LR ammunition , Winchester, American Eagle, Remington Golden and Thunderbolts and found none functioned perfectly and some better than others. The problem was failure to eject with failure to cycle and the slide staying open twenty to fifty percent of the time. Is anyone familiar with this conversion and what ammunition functions in it the best. The Browning pistol is a 1971 production year with no modifications.