Might have been Warren Page ("the Accurate Rifle"...45 years old, but still an interresting read).
Something like "every target is a weather report".
Meaning that mother nature (and with wind in particular) has a lot more to do with the target than we'd like to admit.
Not taking away from your ability to handle that little short pistol, but that had to have been an exceptionally calm day. It's a LONG time between the "pop" of the pistol being shot and the sound of the target being hit getting back to you....and a whole "carp load" of bad ju-ju between here and there that you've no control over.