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Senior Member Join Date: Jan 2005 Location: Mountain Top, PA
Posts: 1,360
| Zero
Theoretical or true? If I sight my M1 or M14 in at 50 yds. and shoot at something 100 yds. away I would guess my shot would be only 1/2" low. Am I right or wrong? |
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Banned Join Date: Dec 2003 Location: San Antonio, TX
Posts: 3,882
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Exsarge, And here I thought this discussion would be about the current occupant of the people's WH. yours, sw |
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Senior Member Join Date: Jan 2005 Location: Mountain Top, PA
Posts: 1,360
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Senior Member Join Date: Aug 2003 Location: Shenandoah Valley
Posts: 3,927
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Senior Member Join Date: Mar 2006 Location: St. Augustine, FL
Posts: 2,482
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There is a trajectory involved. The Canadian Bull target had a X for zeroing 7.62x51 which was above the point of aim and another below for the 5.56. Now in my youth it was accepted to sight the .30-06 in to Point of Aim at 250 yards and I forget where it crossed the Line of Sight, the first time. Geoff Who knows too much to ever want total recall. |
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Senior Member Join Date: Sep 2003 Location: Biloxi, MS
Posts: 1,548
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Senior Member Join Date: Jul 2011 Location: California
Posts: 795
| Quote:
Hornady has an online ballistics calculator. It shows a quarter inch high for the following. I deleted the results because I'm too lazy to edit out all the tab characters. Ballistic Coefficient 0.5 Velocity (ft/s) 2700 Weight (grains) 168 Maximum Range (yds) 100 Interval (yds) 25 Drag Function G1 Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 50 Last edited by phantom4570; 04-18-2013 at 08:24 PM. | |
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Senior Member Join Date: Jan 2005 Location: Mountain Top, PA
Posts: 1,360
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Thanks. Thought it may be high since it's pretty much still on the way up....
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Moderator Join Date: Aug 2004 Location: "Close, but no donut!"
Posts: 13,152
| That's what I would have said. In fact, I wouldn't be surprised if the rounds didn't impact a couple (or several) inches high at 100 with a 50 yard zero. Now, it's very different with a .22. Zero at 50 and you can expect a drop of 6 to 7 inches at 100. |
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Senior Member Join Date: Sep 2003 Location: Biloxi, MS
Posts: 1,548
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Senior Member Join Date: Jul 2011 Location: California
Posts: 795
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Moderator Join Date: Aug 2004 Location: "Close, but no donut!"
Posts: 13,152
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I was reading something today that said a 50 yard dead-on zero with an AR will also be dead-on at around 250. Which means that yes, it will be several inches high at 100.
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Senior Member Join Date: Sep 2005
Posts: 2,541
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My recollection of the 50 yard AR zero is dead on again around 225, about 1 inch high at 200.. Per the handy dandy chart in the NRA LE Instructors book.
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