I didn't want to continue taking up other peoples threads so I will start a new one.
I have been shooting single action revolvers as long as I have double action. The first two handguns I started on were a Ruger Blackhawk and S&W N frame. While I'm no expert on either, it did not take me long to become proficient with most double actions. I've tried for years to become comfortable shooting a single action, it's just not happening. Currently the only gun I own with a single action grip is a TC Scout Pistol, a 54 caliber muzzleloading monster. loaded with 60 grains FF Goex and a round ball, it's just fine. I tried a single shot with 80 grains and a 380 grain REAL. I knew it would be strong, so gripped as tight as possible. While the recoil was stout, nothing crazy, I've never come so close to taking a front sight in the head. The gun is not controllable in the slightest. This has been my experience with every powerful single action I've ever tried.
I'm not here to bash on single action revolvers, I just want to understand the science of why the round grip style are around, and almost unanimously used for the largest handguns. I've never got to try a large bore with a Bisley grip, I've not come across anyone who owns one. I'd like to some day, and for all I know it is the answer. It seems to me that the grip with a rounded back, fat bottom, and straight taper to the top is designed to fail. I've read over and over how the roll, really a loss of control in my view, can be used to cock the hammer one handed. I can see them working just fine for that job with softer shooting guns that don't have the power to cartwheel themselves. I've tried a very relaxed arm, something almost impossible to do from a bench, and still the gun turns in the hand faster than it can impart any recoil to my wrist and elbow.
Double actions are so simple by comparison. Whether it's a frame or grip stud, both are shaped like a human hand for the most part. You are then free to find the grip that fits your hand the best. I just don't understand what the single action grips are going for. In no way does the profile resemble a palm of a hand, and the grip panels don't either. You can hold them high, middle, or even low with pinky below the grip, it all feels the same. Vertical stringing is often the result for me. A double action grip just sucks your hand right into place.
It seems I'm missing out on some great firearms, I'd like to figure out how to make them work.