Don't know about L24, but I have hit a 10" diameter gong plate @ 400 yards 50% of the time. This was with my Imbel Fal, prone w/bag front rest, M80 ball, 400 meter rear sight setting.
The gong was painted blaze orange, and at 400 was a meer tiny dot to my old eyes. We set the gong out to 500 and the hit percentage dropped to 20%. Still doable though.
