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Posted: 4/19/2003 3:06:34 AM EDT
| Ok, how do I know if BAC works for me? I can see the dot "floating" in my left eye and see the backround normally. And when I close my left eye, it goes to the zoomed picture. This is normal, correct? However I've read that you can use the floating reticle to use in CQB, sort of like an aimpoint. However, the zoomed view, and the reticle imposed on the backround are at totally different POI. If I tried to hit using only the imposed reticle it would be off by at least a foot to the right at 50 feet, when compared to the zoomed view, but still in the general area of the target. Is it that BAC just doesnt work for me? Or is this how everyone sees it? |
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It should go to zoomed picture w/o closing the left eye. Once you stop moving the rifle you should be able to aim using the zoomed view with both eyes open. Yes, POI [b]will[/b] be different for zoomed vs. non-zoomed (BAC) view. There's no way around it, and it's one "feature" of the ACOG that seems to get glossed over a lot by the ACOG fans here. Unfortunately it also seems to vary from person to person. I don't have an ACOG yet (still saving the $$$) but I did a little experiment a while back. I have a 4x scope ($30 Tasco I took off a .22) mounted on a flat-top AR and I wanted to see if BAC worked for me. So I set up a silhouette target made from a paper bag at 50 ft and drew a 1" dot on it with a marker. Then I'd shoulder the rifle with both eyes open and try to shoot at the dot. Once I put the crosshairs on the dot and stopped moving it wanted to zoom in automatically. Using the zoomed view I shot a nice group just below the dot (because of the range--I'm zeroed at 50 yards). Then I tried to put the crosshairs on the dot in "BAC mode" and pull the trigger w/o adjusting before my brain zoomed in. I shot a much larger group about 6" up and to the left of the first group. Still on the silhouette, but off in the shoulder. It'd be interesting to see how much offset different people have in a similar experiment. |
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To effectively use BAC an illuminated reticle is needed, as it will properly draw the eye to it. The 'normal' reticle does not draw the eye to it in the same manner, and as a result you will notice great POA/POI shifts using it that way. The greatest shift I have seen is 3" @ 50m (and standing and moving it was hard to tell) I think is is a minor issue - if you engage in the BAC mode it will be a quick snap at a tgt that is either a fleeting shot or has just appeared - and CoM (centre of visible mass) is the rule of the game for those. If you have more time 'dial in' and dump it then. -Kevin |
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