One eye joe,
I have to say that regarding this one you are wrong. You cannot group all types of porting together. I have all my revolvers magnaported and my 3" 696 .44 special has no recoil at all (even with a 255 grain Keith that is chronoed at 980 fps---from Buffalo Bore). That same bullet made my M396 Night guard (24 oz Scandium) jump like a .357 magnum LOL....I had that gun magnaported and it reduced muzzle rise by 25% (angle theta as I measured was reduced by 25% using that same round). For follow-up shots magnaporting helps with control and accuracy. If you have any questions about that process talk to Ken Kelly at Magnaport.
It should be noted that Mag-na-porting a firearm:
* does NOT reduce velocity
* does NOT affect inherent accuracy
* does NOT raise noise level
Mag-na-porting:
* DOES reduce muzzle lift
* DOES reduce perceived recoil
* DOES increase the value of a firearm
Mag-na-port International--The Company
I have tested my revolvers with both magnaported and unmagnaported barrels and there is really hardly a difference. You need to use flash suppressed self-defense ammo if you are worried about it because revolvers due to the fact there is a cylinder gap and a cylinder are going to have some flash anyway.