Originally Posted by
RevolverRob
The quote from our late founder is the one that sticks with me the most,
Honestly it boils down to this: repetitive stress injury.
If you shoot modern iso with a firm wrist and tight grip, the recoil has to go somewhere. Repeatedly the elbows flex and can eventually cause tendonitis in the elbows (tennis elbow).
If you shoot the older style with a little bit looser grip and tight arms you recoil goes more into the wrists, you end up with wrist injuries.
Jerry Miculek has commented multiple times that he can no longer feel most of his right hand thumb, due to repetitive nerve injuries on that hand from revolver shooting (which tends to distribute recoil into the web of the shooting hand, due to the squareness of the backstrap).
High-level shotgun competitors usually have shoulder issues.
Shoot enough and it will get you.
What you shoot and how much of it you shoot contributes to how long you have before your hands/arms/wrists/shoulders are eventually damaged beyond your body's ability to repair them. This is one reason to emphasize quality over quantity in terms of training, be it live or dry fire.