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Posted: 12/18/2002 10:53:01 AM EDT
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Fired my out of box Bushy XM15 E2S for first time yesterday at 25 yd indoor. Following the manual, I lowered the front post around 10 clicks and went left about 6 clicks to put them in the 10. Idon't like how the front post is now so low. If I back off the front post about6 clicks and lower the point of impact again, how many clicks up would I need to turn the dial (under the windage) to compensate and make up for the 6 clicks on the front post? BTW, am quite happy with the first 50 rds. Used USGI mags from ar15mags.com--Don Goertzen was a pleasure to deal with. Happy Holidays all! |
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Not sure what sort of shooting you're trying to accomplish but the front sight is 5MOA per revolution and each click of the elevation on the rear sight is 1MOA. This goes back to the olde M16 which had a round front sight post with five (5) notches in the sight. When the front sight was made square the thread was left the same. Windage on the rear sight is 1/2MOA. (All for 20" bbls with standard sights.) If you're going to be shooting bullseyes you may want to get a match sight with 1/2MOA elevevation clicks. If you want the bullet to strike where you aim, rather than several inches above it as in bullseye shooting you need to start over again using [url="http://communities.msn.com/TheMarylandAR15ShootersSite/improvedbattlesightzero.msnw"]Improved Battlesight Zero[/url] which keeps the bullet within 2" of line of sight from about 15 feet to 220 meters. -- Chuck |
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The dial on the rear sight is for adjusting for distance. Only the front sight is adjusted to zero for elevation. There are several different methods for zeroing--with different combinations of dial settings, distances, and point-of-impact. All involve setting the rear at a particular setting, then adjusting the front until it hits in the right place. Once you've got it adjusted you can then dial in the distance on the rear sight and expect the bullets to hit where you're aiming. There a good page of [url=http://groups.msn.com/TheMarylandAR15ShootersSite/zeroingmethods.msnw]zeroing methods at the Maryland AR15 Shooters Site[/url]. The Improved Battlesight Zero Chuck mentioned is the best general purpose setting. It gets you a zero that's "close enough" at all ranges out to 220m or so, and sets the dial up right. If you only have 25 yards available there's also a method on there for approximating the IBZ at 25. |
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JAMESA, all of these methods locate the rear sight before shooting and adjusting the ft. sight. iow - set the rear sight to prescribed setting [ elevation ] , shoot, set ft. sight. hope this helps. read the ' 50 yard zero' method, its ,imo, the most useful. make sure you understand trajectory, you will then be unstopable. |
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