JJHACK, that is a lovely bit of functional decoration you put on your FA revolver. And yes, Bisley frame and grips aids in the recoil department by limiting the movement of the gun within the shooter's grip. But the fatter grips I made sure make a huge difference as well.
Sothoth, there is simply no way that a 629 has a higher bore axis than a SBH. I think you're being fooled by the high hump of the SBH's top strap on the frame into thinking that this is the case.
The "plowshare" grip on the SA revolvers does slide and pivot in the hand. With .38's and maybe lighter .357's not so much. Or the shooter might be able to hang on well enough to avoid movement. But with any of the SA guns and full on .44Mag loads it would require either sticky rubber or some contact cement holding the gun to the shooter's hand to avoid movement. But some movement is good in this case. Being a SA revolver you need to cock again before you shoot. So it's not like you'll rapid fire with these rounds like you might want to with a DA/SA revolver. And if you did rapid shoot in a two handed manner like in cowboy action shooting I sort of doubt you'd be using full power .44Mag loads.
Of the .44Mag guns I've owned or shot I found that the best STOCK setup for me was the S&W 629 with the factory rubber grips. This setup seemed to fit the hand the best and fit moreso than material seems to aid in reducing the recoil shock. Next in line was the Ruger Redhawk with stock rubber grips. I only owned it for a short time before selling it to a good friend that wanted it but it shot well. But I've got a short barrel Super Redhawk that makes me grin more so I didn't have much trouble in selling it off.
On the other hand I found that the STOCK grips on the SBH are just terrible for anyone with bigger hands that is not capable of crushing walnuts one handed...
And truly if you look around you'll see LOTS of folks that switched out the stock grips for aftermarket options. The Super Redhawk stock grips seem to fall in the same category. I know I quickly swapped mine for a Hogue rubber monogrip.
The SBH, Redhawk and SRH are all a trifle heavier than the S&W 629 or 29. So they will do a slightly better job of absorbing the recoil. At least this seemed to be the case for myself. But since anyone that shoots much .44Mag at all SHOULD be reloading their own it's not hard to dial down the power to about 90% of full pressure. And even that 10% off the top is enough to make the S&W a pleasure to shoot vs a nasty hand bumper when using full house loads.
At least that's what I've found. This is all very personal of course.