I have been reloading "mild" rounds for target practice and have not had any issues with my Dan Wesson RZ-10. Recently, I started reloading slightly hotter rounds and the slide now locks open before the last shot is fired. Is this a recoil spring issue? These hotter loads are still within acceptable parameters (180 gr bullet and 7.2 gr Autocomp).
Be sure you are not pushing up on the slide stop as you are shooting...
It maybe the slide velocity is over running the magazine spring's ability to push the round up for feeding.
Or the increased impulse may be inducing a bounce of the slide stop locking open the slide.
Thanks Shadow. I will first make certain that I am not hitting the slide-stop. If that does not fix the problem, I will then may swap out the recoil spring for a slightly heavier one. I believe that the RZ-10 uses an 18.5# spring.
Look at the inside of your slide stop. See if theres any coloring from the bullet on the slide stop. Mine was doing the exact thing with my hotter ammo and underwood ammo. I worked it a little and gave up. I emailed Keith and sent it back and he fixed it.