Mike P, on Jul 12 2009, 08:57 PM, said:
The book "Grren Eyes and Black Rifles" explains it pretty well. The ten and two is right, depending on your zero and target size, you may or may not need to hold off some at 100.
Mike
took a class with Kyle Lamb in NC where he spent a lot of time shooting from unusual/improvised positions. this included a lot of extreme cant:
"junkyard prone" - laying the rifle flat on its side on top of cover (trunk/hood of vehicle),
"brokeback mountain prone" - hard to describe but basically looks like you're kneeling in a supplicatn position with your forhead flat on the ground shooting downrange from a rollover prone position.
rule of thumb was aiming "high on the magazine side", i.e. when rolling rifle left (ejection port up), then aim high right (i.e. the side the magazine is sticking out on". Most shooters found that when rolling the rifle 90 degrees, their POI would shift approx 6" - 8" down and to the side. A 2:00 or 10:00 hold worked for me.
/thread drift/
after running through a number of drills, he had his adjunct instructors strip the bolt carrier out of his rifle and then take up some of these positions from behind a vehicle for cover. we went 100 yards downrange to see what the shooter profile looked like. The AI was a big guy, probably 6'3" and 215lbs. it was pretty terrifying to see how small this guy could get from some of these positions. crouching behind the wheel of an old toyata cresida shooting brokeback prone around the front tire, he was basically invisible
/end thread drift/
-jared
edit to add: i'm using a 50 yd zero shooting 55gr ball @ 2950 fps, changes in ammunition or zero might impact poi under cant, but i wouldn't think by much at 100 yds...
This post has been edited by jaredr: 17 August 2009 - 07:06 PM