Don... there is another facet to cocking a revolver for single action fire: conformation of the hammer and hammer spur. A tall or long hammer spur increases leverage. Sharp serrations or checkering on the spur enhance purchase.
I happen to love Peacemaker ergonomics. Great handling and pointing characteristics. It has not the grip for dissipating recoil sharper than the standard .45 Colt load. For fast draw pointability, the Blackhawk is superior to the Super Blackhawk. The Super Blackhawk grip was intended to spread recoil, slow rotation, and increase the distance between your middle knuckle and the trigger guard.
You might try a Bisley grip frame on your Single-Six----last one I bought from Ruger parts, with appropriate hammer and trigger and socket-head screws, ran over $100. A Bisley grip on the Single-Six puts more weight in the hand, lightening one's sense of where the muzzle is, an undesirable feature. The aluminum grip frame makes for nice balance of the chrome-moly Single-Six. Your stainless S-S has a stainless grip frame; beautiful, but heavier.
The Colt peacemaker grip frame has thinner straps. With short barrel, the peacemaker truly was a pocket cannon.
Two things to be aware of with the Ruger Bisley: the low hammer spur, in conjunction with the high backstrap, places the spur of a cocked hammer closer to the backstrap. One must be aware of this when shooting with a gloved hand. The web portion of the glove can capture the spur and prevent or delay hammer fall. Something to consider at all times when afield.
Spur serrations of the Ruger Bisley hammer take less aggressive bite of your thumb.
If taking purchase of your Peacemaker-style hammer is at all iffy, sharpen the serrations or crosshatch them with a fine checking file.
Also, consider shooting with the softest, close-fitting deerskin gloves. Rub the gloves with leather treatmen, such as Pecard's, mink oil, snowproof, or pure neatsfoot oil. So treated, the gloves last and provide better tactile control.
David Bradshaw