http://findarticles.com/p/articles/mi_m ... 22919/pg_3
Still, if the lighter spring was the only difference and one would forego +P, could you just use a lighter recoil spring?However, Moon learned a lot of customers preferred standard-pressure 9mm rounds or had to carry the feeble subsonic ammo issued by their agencies. He also discovered that some female users found the slide spring too strong to manipulate. He designed a model using a lighter recoil spring. This was originally known as the "Lady Kahr" model. No more than 2,000 were made, says Harris, before the company went back to using standard springs.