I thought the video was well done to explain the postions. The author might have noted, that offhand, means "off the hands" with no body or sling rest - oh well. Bravo, anyway.
Should also note, the ctg. event at Hefley Creek Rendezvous was attended by a number of guys shooting ML's. One of our lads chose to use his .54 Hawken, striking the 650yard gong with his first shot using a round ball, of course. This marksman, John, did well indeed considering the long ranges involved. Had he been in a militia shooting volley shots at long range targets, they'd have been in jeopardy.