I have similar but mine are VERY low powered rounds which will get the boolit out of the barrel and to the target but do not have sufficient pressure to cycle the slide. That way I do not “Teach myself a bad habit” by trying to “save my dummy rounds” by doing something other than normal emergency clearing.
On “dummy” rounds with no primer in most modern guns will not be an issue but there is the chance that your firing pin with nothing to “stop” it can travel too far in to the firing pin hole and get stuck. When you rack the slide the brass being forced over the pin COULD snap it off.
One other note of caution when mixing dummy ammo with live ammo. ONLY have enough live ammo for the range day you are there for. In other words if you are going to shoot 100 rounds FOR certain! make sure you have 100 rounds fired and recover the same number of dummies that you introduced. In our current times and with ammo being as hard to get as it is you DO NOT want to induce failure if SHTF and you need ammo NOW!