I have discussed ammo before when copying a 1911 platform. 7.62x25 out performs 9mm any day of the week. I have a norinco 7.62x25 hand gun. I out shot Makarov, Ruger, Smith & Wesson 9mm. Distance and accuracy. I find you can build any gun but ammo is important factor. 7.62x25 hits just as hard...