The problem is not the revolver, it's the hamfisted operator, and in my defenc/se, it wasn't me, yer'onner. I loaned it to the guy next to me to Demonstrate and shoot so's I could load up and shoot a few Miniés from my Musketoon, he being a well-regarded shooter, and, like me, an NRA BP-qualified RCO.
I make a special thing of making certain sure that the lock is locked on every occasion I have for taking the cylinder out on the range, which, if I'm truthful, is not very often
If that's the only excuse you have for not buying a ROA then all I can say is that there are obviously way too many of them around where you are. Here in UK you CAN luck in, but usually expect to pay around the $850-900 - Vaquero versions even more.