All three targets are at 50 feet. We are using NRA regulation 50' targets. The SF target is a much harder target because it's a little smaller and has a lot more rings. I'm shooting fairly mild-loaded wadcutters.
I figured it was because I'm thinking too much. Probably waiting until the sights are perfectly on target and then jerking the trigger -- although if that were the case I should be throwing all the shots the same way.
On RF, there's no time to think and so I do pretty well.
Maybe I need to load 5 live rounds and 1 dud, then spin the cylinder so I won't know when the "click" will come.