Loose screws on a revolver? Time to invest in blue loctite.
I shot two revolvers tonight, a Smith and a Pietta. When I was done I found a loose action screw on the Pietta (which I just converted from BP to 45LC, so I haven't shot it in several years) and a loose cylinder latch on the Smith.
To be fair, the cylinder latch on one of my Taurus revolvers has come loose a time or two as well. The other two....chambered in smaller calibers...have never had any issues.
Unless you loctite them, screws WILL come loose. I don't care what brand you are shooting.