Here's a tip, since this is your first, with a CORRECTLY FITTING screwdriver, check all screws before each shooting session.
There is something about the recoil of a revolver that loosens screws. Not all the time, not every time, not every screw, but sometimes, some guns, some screws. It can happen. Get in the habit of checking them. IF/when you find one that is repeatedly getting loose, a small application of the proper Loctite generally solves the problem.
You might want to consider doing that to the cylinder base pin retaining screw on your Ruger, I had that assembly unscrew and fly off for parts unknown one time, shooting a Vaquero .44 Mag. End of shooting that gun, that day. Ruger sent me new parts, no problem, and when I installed them I used "Guntite" on the threads and never had that problem again.
I shoot it two handed. My right hand squeezes quite firmly,me left thumb cocks during recoil. I don't let it roll,I hold my grip,and because there WILL be recoil recovery,regardless, I can shoot it as fast as a double action with full power loads.
My shooting style is almost the exact opposite. I don't grip the gun very firmly, just firmly enough to ensure control. I shoot mostly one handed, sometimes using the off hand for support, but not on the gun, and I don't cock it with my off hand. I let the gun roll, as much as it will with pachmayrs. For me, its not a speed machine, its a repeater, and I don't try to keep it locked in one place the way I do for some lighter recoiling guns, like DA .38s/357s. I'm about as fast SA as I am with an equally recoiling DA, (which I almost always shoot SA anyway), for me both take about the same amount of time to aim for follow up shots. We're all different.
A friend of a friend is the kind of guy who makes a mountain gorilla look wimpy (plus he has longer thumbs
) he can shot full house .44Mag DA at a speed that wins matches. I can't.
Takes me about 7 seconds to drop 5 bowling pins, shooting "crank and yank" (SA revolver). I've done it in 5.36 seconds shooting a .44 Auto Mag, and 4.37seconds (7 pins) shooting a .357 Desert Eagle. None of those times even placed 3rd...I'm not the fastest gun out there, by a long shot. But, its fun.
I like Ruger SA's. They're just FUN to shoot. I like working the action, the way I like a standard transmission in a car that's fun to drive. Not the fastest, or most efficient out there, but then, neither am I.
Enjoy your gun, and those Rem 240s, and hang on to it, enough so it doesn't hit you in the face or you drop it. After that, how you shoot it is entirely up to you.
when you get around to reloading for it, I recommend 2400 powder. It will do well in midrange loads up to full house magnums. Lots of others will work well, too. I use 2400 in the .44 Mag and for magnum in .357 as well.
I use Unique in my .45 Colts, but I limit them to about 1100fps for my shooting pleasure and Unqiue will do that just fine, in either .44 or .45 calibers.