Dave: I have used 3913s ever since they were introduced. I have had great luck at purchasing any old dirt cheap ammo for practice as long as it is the same bullet weight as my carry loads. POI has certainly been close enough for self-defense distances. Of course your 3913 should be sighted in using your dead serious carry load.
I haven't posted this trick for some years and now would be a good time to bring it up again. For the absolute finest sight in job on any open sight pistol do it at night. Get a board the right size to put up against your front bumper between the headlights, sit on the ground and lean back against the board with the head lights on normal, put a belt around your knees to rest your hands on, use a round target of gray on a white background at your selected distances. You will be astounded at the clarity and sharpness of your sights vs. the target. Obviously you need to be at a range or a gravel pit where night shooting is allowed. I have been knows to call the County Sheriff's Dispatchers and let them know what was going to take place at my shooting site. ............. Big Cholla
