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Long Range Hunting & Shooting
Altitude effect on custom dial scope
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<blockquote data-quote="Lenny Foffa" data-source="post: 2628353" data-attributes="member: 100742"><p>I would suggest the JBM ballistic program. You simply input all your particulars and hit "Calculate ", then run that very same program, <strong>changing</strong> <strong>only the altitude.</strong> Then run it again and<strong> change only the Temp.</strong> I would expect you will see no difference in the numbers out to 500 yards, and the slightest bit at 600 to 800. I did that with my 270 Weatherby Mag. Since the Bang Steel Shooting School range is at 2800 feet, the Deer Hunt in N Carolina is about 700 to 800 feet, and my range in New Jersey is about 400 feet. In my mind the deer's heart is about 3 X 5 inches, if I am shooting good groups at 300 yards at my local range, and I make a bad shot at a buck in N Carolina, it is not the 400-foot altitude difference. Its my Inability to judge the wind, OR , I just Blew the shot !!!! By the way , If there is a possibility of a shot at 400 yards or beyond, I use one of those stupid wrist forearm band things the football players use, with my ballistic data out to 700 yards. So I know to change the Eliv. dial from 3 to 4 or 4 to 5 .</p></blockquote><p></p>
[QUOTE="Lenny Foffa, post: 2628353, member: 100742"] I would suggest the JBM ballistic program. You simply input all your particulars and hit "Calculate ", then run that very same program, [B]changing[/B] [B]only the altitude.[/B] Then run it again and[B] change only the Temp.[/B] I would expect you will see no difference in the numbers out to 500 yards, and the slightest bit at 600 to 800. I did that with my 270 Weatherby Mag. Since the Bang Steel Shooting School range is at 2800 feet, the Deer Hunt in N Carolina is about 700 to 800 feet, and my range in New Jersey is about 400 feet. In my mind the deer's heart is about 3 X 5 inches, if I am shooting good groups at 300 yards at my local range, and I make a bad shot at a buck in N Carolina, it is not the 400-foot altitude difference. Its my Inability to judge the wind, OR , I just Blew the shot !!!! By the way , If there is a possibility of a shot at 400 yards or beyond, I use one of those stupid wrist forearm band things the football players use, with my ballistic data out to 700 yards. So I know to change the Eliv. dial from 3 to 4 or 4 to 5 . [/QUOTE]
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Altitude effect on custom dial scope
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