Other mistake: When Stallone stops the bad guys in the semi full of cocaine, they fly through a windshield that is apparently made of plate glass, and not the safety glass found on almost every other vehicle windshield on earth.
Other mistake: Their big 4x4 at the end is really a two wheel drive. When they make the big jump with the fire all around them you can see the front end in the light. There is no front differential, just two big A frames.
Other mistake: After Tango and Cash go down the chute and into the boiler room, Conan approaches them and says, "On the road, this pig and his cop friends broke my ribs, my leg, and my jaw" without an accent. All of the other lines that he had before, he had a Mexican accent. It also seems like all of his other lines after that point are said without an accent as well.
Other mistake: When Cash runs for the wire when escaping the prison in the long shots the stunt man's hair isn't plastered down with the rain and also where was Kurt Russell is wearing a muscle vest his stuntman is wearing a t shirt with sleeves.
Answer: He was doing a combat reload, where you eject all the rounds, spent or not and fill the revolver with new ones. It guarantees six shots, rather than relying on "indexing" where you count every round fired.
stiiggy
That doesn't make any sense since he hadn't fired a single round and the gun was fully loaded.
It's hard to tell, but it does look like there were at least some empty shells that land on the ground. A revolver isn't going to eject spent shells, so there's no way to say it was fully loaded.
Bishop73