Yes, MC is Match Champion.
If no one in the group could shoot it well, first find the best shooter in the group and have him (or her) bench rest it to see exactly what is going on. If you're not sure exactly how to do this with a handgun, there are a lot of tutorials on the web. Find the one you are most comfortable with at go at it. Start close up, then move back until the groups open up.
You said you can shoot ok with a .45 or 9mm. Shooting semi autos versus shooting DA revolvers is miles apart. What k22fan says is a good start, you really need someone who is VERY familiar with DA revolver shooting (versus DA semi-auto shooting) and have them stand at about your 8 o'clock position (for a right hander, 4 o'clock for a lefty) so he (or she) can watch your hand/finger movement and any changes in your grip as you squeeze the trigger. They will also be able to watch the barrel to see any incorrect/unnecessary movement. Also, are you shooting both eyes open, one closed, etc? What stance are you using? Also, do you know which is your dominant eye (this is not necessarily the eye you use when shooting a rifle). I am right handed but left eye dominant so to shoot my handguns the best I can I had to modify my stance and head position so I had the best sight picture for me (but I shoot long arm differently depending on whether it is a shotgun or rifle).
Doing the video taping thing would also help as you can review with your "coach" and they can point out those things during the video review (especially in the zoom mode so you can see what you're doing best).
Also, don't shoot as fast as you can, slow down, take it easy, there is a saying in competition "Slow is smooth, smooth is fast". Fire a round, lower the gun, rest for a couple seconds, raise the gun, fire a round... Get used to the trigger pull and when you raise the gun to shoot the next round, think about the mechanics of what you are about to do. You can also do this while dry firing, and dry firing the Ruger will not hurt it and actually will help smooth up the trigger/sear/hammer.
As you can see, there is a lot to do to be come proficient in shooting a handgun, especially when you are new to a different platform.