Open gaps
As wear increases and tolerances open-up, fire can get inside many ways.
The jury is still out on wheather a chain fire occurs from the front or the nipples of a revolver but in any case, loose guns are dangerous!
A loose cylinder acn promote cap misfires cause thecaps aren't being hit right.
The plain solution is do not overload a Brasser!
If you have a loose one make it a wallhqanger. BP revolvers are cheap enough as to not endanger yourself or innocent bystanders! Buy yourself a new safe gun.
ZVP