The front post is high, don't level it against the rears. Use the dots to align for long distance, or just cover with the front dot at short distance. And quit flinching, you're anticipating the trigger pull.
I had the same problem, out of the box mine shot low 12" and left 12"; at 7 yards; Sent it to Miami and got it back in 8 days.
They replaced the front sight and said it was fixed;Now it just shoots low 6" and left 6" at 7 yards. You also have to concider
that you only have a 3" barrel and 1 and 1/16 of that is bullet chamber; Miami also ignored my question if it could be made
into double action only.