Took my Remington SP-10 to the range yesterday to pattern some with a new choke. I made one shot, replaced the target, reloaded another round and the trigger was stuck. I unloaded and removed the trigger assembly. It would work outside the gun no problem, put it back in the gun and it started doing it again. This repeated a couple of times after I sprayed some oil in the trigger assembly. Finally after several tries I got it to working again. Any ideas as to what could have caused it? The only thing that I could think of was that the bolt release could have jammed.