I reload, so have no clue what factory loads are like (other than .22) .
I totally agree ... except if you don't reload. Then you have to buy .44Spec ammo to tame the recoil.Unless someone is giving you a bunch of free .44 spec. brass there is no reason I can see not to load .44 mag. brass to whatever you desire.
I've shot 17.5 2400 under a 250 cast swc in my SAA and M-21 as well as a ruger flat top. It aint fun.
I don't think he's asking about handloads.
I'm no physicist so I have no scientific answer for you. All I can tell you is that, shooting the two guns side by side, both of us had the same impression - the Mag-na-ported 3" S&W was softer and more comfortable shooting than the Ruger. There is nothing wrong with either gun and we shot them with the same ammunition. While that may be difficult for you to accept, it is the way it is. If you're ever out my way I'd be happy to let you try it for yourself.I have never thought that porting does much to reduce recoil. Muzzle flip yes, but recoil not much as the redirection of combustion products is vertical. I doubt I would think a 3" M29 would have less recoil than a Ruger Redhawk with a 7-1/2" barrel. The Redhawk is about 54 oz. The M29 is about 40 oz. I am surpised to hear that the M29 has less recoil with the same loads than a 7-1/2" Redhawk. Is there is something wrong with one, or more, or the revolvers.
What do you think accounts for that less recoil ? Do others get less recoil via a porting operation ?