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Posted: 4/1/2006 9:09:56 AM EDT
[Last Edit: 4/1/2006 9:10:38 AM EDT by QuarterStickNick]
I shot some groups at 25 yards.The were about 1/2 inch groups or smaller.That I went out to 50 yards an it was shooting one inch hight.At 100 yards it was shooting 1 1/2 inches high.It was the same thing using my Arms 40L also.Why is this happening.
Link Posted: 4/1/2006 9:29:41 AM EDT
height over bore, external ballistics, and whatnot. at 25 yards, I'd want my rounds impacting below my point of aim. . . . . I'm sure others will chime in soon. I don't think there's anything wrong with your M2.
Link Posted: 4/1/2006 9:41:49 AM EDT
What range did you zero it? It sounds like you zeroed at 25 yards.

Try 50 yards.
Link Posted: 4/1/2006 9:53:47 AM EDT
[Last Edit: 4/1/2006 9:55:34 AM EDT by QuarterStickNick]
I also did zero it at 50 yards and was still high at 100. Shouldnt it still be dead on at 100 yards after zeroing at 50??Thats only 50 yards longer.
Link Posted: 4/1/2006 12:08:30 PM EDT

Originally Posted By QuarterStickNick:
I also did zero it at 50 yards and was still high at 100. Shouldnt it still be dead on at 100 yards after zeroing at 50??Thats only 50 yards longer.


It should be low at 25, dead on at 50, and a little high at 100. That zero keeps you within something like 2" out to 250yards, IIRC. I'm sure one of our ballisticians will be along shortly with the actual numbers.
Link Posted: 4/1/2006 5:52:25 PM EDT
Example: 77 grain MatchKing fired from a 20" barrel with iron sights that are zeroed at 50 yards.

At 25 yards the bullet strikes about 1.1" low.
At 50 yards dead on.
At 100 yards the bullet strikes about 1.25" high.

Link Posted: 4/1/2006 7:16:18 PM EDT
Thanks for the info guys!
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