I can't tell you Brknarrow's motive Muley. But I can tell you mine. I just plain like sidelocks.

If you're questioning why shoot anything other than a round ball out of a sidelock, there are several possible answers;

(1) Because I want to.
(2) Because I can.
(3) Because a sabotted bullet is a heck of a lot more effective than a round ball.
(4) Because it doubles a sidelock's range.
(5) Because I don't have any hang-ups over it.
(6) Because I want to.
(7) Because I want to.
(8) Because I want to.