Originally Posted by
MP01
The bore axis is about 3/16" higher based on back-strap/bore axis dimensions but the addition of a hammer adds to the force holding the slide locked longer. Striker fired guns tend to unlock faster. For that very reason my LW 1911 CCO in 9mm shoots softer than my G19,17 or 35. Bore axis is critical when it is dramatic and on the same locking/mechanical system. I shoot both and the P-series guns shoot softer, especially the P09. There is absolutely no way not to notice when you shoot them side by side. That said my P09 shoots softer than my SP01 as well.