I suppose if it makes you feel better, go ahead. I don't see a reason for anything like that. Further, I wouldn't want anything like that impeding the operation of the gun. That band is going to add resistance not only to the hammer, but also to cylinder rotation, albeit probably a negligible amount. And while it may be statistically unlikely, what happens if you need to reload? Have you at least done dry fire practice with the band in place to see how it affects the way you operate it? Or practiced removing the band when retrieving it?