Like I said, LH, you need to determine what shot you expect to take with that gun. If you will have your 1911 on you when there's the active shooter, take the shot with the 1911. If not, then DONT take the shot with the snub.
I also think we're focusing too much on one or the other - the gun or the shooter. This dichotomy is where we're getting hung up. The gun and the shooter work together. If you don't work together well, it won't work. It's just like a team - if the individuals are good, but are not trained to work together, don't know each other, and maybe even don't like each other (he hurts my hand every time I go to the range), then you're not going to work well as a TEAM. Similarly, if you are not familiar with a firearm, you won't work as well as a system.
Thus, the problem isn't the shooter or the gun, but familiarity. Therefore, familiarity must change. Since you obviously can't change yourself out for someone more familiar with the snub, you can either change the platform to something you have increased familiarity with, or you can train to increase your familiarity with that platform.