Three small .38s: S&W 640, Taurus 856 2”, and an 856 Defender 3”. The 3” makes 3-5” groups from a rest at 10 yards, I get 1 1/2” groups out of the others. What should I look for in the 3” to figure out why it groups worse?
If I had to keep just one, the 640 wins hands down. But the 3” with...