dennisp,
You may be thinking of lock time vs hammer inertia. You're a sharp guy dennis, I like your post, but try this: get a small nail started in a piece of wood. Take a small hammer and see how deep the nail goes with each blow. Take a bigger hammer and use the same speed to hit the nail with. The outcome will be predictible.
My goal with the Race hammer is to allow the lightest possible hammer spring, for 4-5# DA pull, and still set off a primer reliably. Think about that for second . . . a 4-5# DA. We're doing it now, but we are primer restricted (Federals). The hammers used in CZ's weigh around 4.0 oz, my machined Shadow hammer is 4.4 oz, and I plan on my Race hammer coming in a 5.0 oz. That's a 25% increase over stock, which would be similiar to having a 25% stronger hammer spring.
Don't know about it being legal . . . .