Prepster,
You have either good luck, or very good natural instncts. Rob Lehy is a mater craftsman. His holsters are just what the name implies, simplr rugged. What he doesn't tell you is that he knows about carrying concealed, and Big guns at that. I have a Sourdough for my 6.5" 629 classic. Yes, virginia, I really do carry a 44 magnum to work every day. On Sundays I carry two. The other one rides in a shoulder holster. And I carry at least two speed loaders, and sometimes four.
As a concealed carry instructor, I often run into people who think that concealed carry means a small gun. Nothing could be further from the truth. If you want to hit something, anything, you had better have a big gun. Not so much caliber wise, but weight, sight radius, and enough room to make the mechanicals inside smoooooth, so you can hit what you are shooting at. If your "pocket rocket" is not capable of enough accuracy to hit a snuff can lid at twenty five yards slow fire, and I mean in you hands, not in a machine rest, what is going to happen under stress? Will you be able to hit someone in the heart or brain at twenty five feet? not likely. It would be hard enough with a good shooting handgun. Remember, all handguns, even your .45 or my .44 magnum are poor excuses for power, although they both are stone killers on even large game. I try to make people understand that it is better to spend a good deal on a holster, and get something that works the first time than to get a box of junk. Very few of them listen.
If I could give you one more piece of advice? Wyat Earp was quoted as saying something like draw as fast as you want to, but take your damn sweet time aiming. We have a whole generation of gun school "instructors" teaching spray and pray with a handgun. I say hit what you shoot at ( the Heart or the brain) two or three times with a heavy caliber, medium speed bullet, and the fight is over. You are not justified to even draw your weapon unless you are truly about to lose your life, anyway, so stand your ground and shoot straight.
Single action disadvantage? I don't think so. If you know what you are doing, your thumb will have the hammer cocked, and your sights will fall back basically on the target, all during recoil. You just have to do it enough to get it into muscle memory. Folks will tell you that you can't do all that while you are under strss, but people fly airplanes in crash landings, drive dirt track cars in four wheel skids, and learn how to swim, box, and stay married, and all kinds of other things that demand a cool head during absolute terror. As a matter of fact, having something to occupy your mind will help you not to panic, if it is ingrained. You are on the right track, and keep up the good work.