"How does the 44 mag rate today", I'd say its held up very well in the game fields, you can certainly go bigger now, much bigger & they have lots more power......power is recoil & recoil for many can mean reduced accuracy. For those that can handle the big boomers its a definite advantage, for those that can't its a huge disadvantage. Trying to keep up with someone else in the horsepower race can cause more problems than it solves, again, for those than can honestly handle 300+ gr bullets at 1300-1400 fps are ahead of the game.
I'm talking strictly revolvers here, not single shots, the single shots are totally different, much longer range capabilities, fine accuracy & rifle knockdown power, if you need rifle type results, then the single shots are the way to go, hands down.
I think the biggest problem with revolver shooters is, then tend to "over gun" that is they get out of their comfort zone as far as recoil is concerned, accuracy suffers & game gets wounded or missed as a result. If 250 gr slugs at 1100 fps are giving you complete penetration what good is a 300 grainer at 1400 fps, yes it will gain you some distance & shoot flatter but I'm talking iron sighted sixguns here so its a short range game we play.
I recently read somewhere about a certain load that was generating 1350 fps & having 29,800 psi, the author said that by dropping the load down to 24,800 psi only cost 100 fps in velocity, thats 5,000 psi difference for only 100 fps, thats a lot of recoil difference!
In my single shots days I used many calibers but the go to guns were a Bullberry 6TCU, a Bullberry 6.5/284 & a magnificent Bullberry 338/284, nothing was safe!
Nowdays its either a 41 Bisley, a 44 Bisley or a 45 Bisley with a 357 Maximum thrown in when I'm expecting 200 yd shots.
If I had to pick a favorite it would be the 44 magnum, a 250 gr Keith & 21 grs of 2400........I think!!
Dick