Slide Locks Back Early
I don't run into this malfunction much, in fact I don't know if I have had it happen before.
I was shooting my S&W M&P 9c. I had run 50 rds of Blazer aluminum with no issues. I decided to shoot off my carry ammo as I hadn't run any hollowpoints through it yet. There were no hangups at all. However when the slide locked back I went down to check my target. When I came back I noticed there was actually still one round left in the magazine. I was shooting 124 gr +P Gold Dots, short barrel.
What might cause this to happen? Maybe I pushed up on the slide release by accident? It is a stout load out of the M&P 9c, can really feel that slide moving fast, but it felt very controllable. I only had the one magazine so I couldn't run more Gold Dots to see if it happened again. It might just be a fluke but I didn't know if there was something I should check.
Know the status of your weapon
Keep your muzzle oriented so that no one will be hurt if the firearm discharges
Keep your finger off the trigger until you have an adequate sight picture
Maintain situational awareness