Has anyone else had any problems with the bolt NOT staying open after the last round being expelled? Mine used to. I clean my pistol as recommended all the time and it won't blowback like it should. Any suggestions?
Does it just not do it when you shoot the gun dry, or will it also not work if you put an empty mag in the gun and pull the slide back?
Have you tried a different magazine?
And, finally, have you changed ammo? Maybe the stuff you use now is not as strong as the stuff you used to use, when it did lock back, and it is pushing the slide far enough to cycle the gun, but NOT QUITE far enough to lock back.
The only way it stays open is when I hold the button to keep it open. Whether it be dry or fired. The ammo never made a difference. It shot it all with no hiccups. (I did have a couple of duds not firing but blame that on the manufacturer)
If it is a new firearm I'd recommend sending it back to Ruger for warranty repair. The bolt hold open tends to wear after a while which would cause it to stop functioning. A weak magazine spring could also be the culprit. Either way, sending it to Ruger is probably the best bet if it is still under warranty.