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Long Range Hunting & Shooting
Where does Rifle cant begin to matter?
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<blockquote data-quote="Hugnot" data-source="post: 2624035" data-attributes="member: 115658"><p>Using the Hornady 4DOF calculator to calculate mid-range trajectory for a 215 Berger at 2,800 fps I came up with:</p><p></p><p>[ATTACH]395896[/ATTACH][ATTACH]395897[/ATTACH]</p><p></p><p>Just under 96 inches or 8 feet. The sine of 1 degree is .017.</p><p></p><p>.017(sine 1 deg) * 96 (mid-range trajectory) = 1.6 or slightly less than 2 inches.</p><p></p><p>This is enough to cause a missed X ring at 1,000 yards. I have seen shooters cant left or right to make tiny wind corrections.</p><p></p><p>Shooting at a pop can size rodent (2.5 wide gopher) at 600:</p><p></p><p>24 inches (mid-range trajectory @ 600, 75 ELDM @ 3150) * .017 (sine 1 degree) = .4 inches >> no big deal, but then there might be some wind to deal with. Wait for the rodent to lay flat & shoot at the upwind end. 5-degree cant would be almost one gopher width at 600.</p><p></p><p>Some guys on this forum shoot golf balls at 1,000 and they would be real deadly on gophers @ 600.</p><p></p><p>1 (sine 90 deg, rifle resting on left side, bolt up) * 96 (mid-range trajectory) = 96 inches, 8 feet, elevation now windage.</p><p>.707 (sine 45 deg) * 96 (mid-range trajectory) = 68 inches, 5.7 feet, rifle cant half way between 90 and 0 deg.</p><p>.5 (sine 30 deg) * 96 (mid-range trajectory) = 48 inches, 4 feet, rifle cant 30 degrees</p><p></p><p>Berger data with same .308 215 gr. @ 2800 is real close. This assumes a 1,000 yard zero as sights would be adjusted to hit at this range. Mid-range trajectory about 93 inches.</p><p></p><p>[ATTACH]395955[/ATTACH]</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2624035, member: 115658"] Using the Hornady 4DOF calculator to calculate mid-range trajectory for a 215 Berger at 2,800 fps I came up with: [ATTACH alt="Screenshot (451).png"]395896[/ATTACH][ATTACH alt="Screenshot (452).png"]395897[/ATTACH] Just under 96 inches or 8 feet. The sine of 1 degree is .017. .017(sine 1 deg) * 96 (mid-range trajectory) = 1.6 or slightly less than 2 inches. This is enough to cause a missed X ring at 1,000 yards. I have seen shooters cant left or right to make tiny wind corrections. Shooting at a pop can size rodent (2.5 wide gopher) at 600: 24 inches (mid-range trajectory @ 600, 75 ELDM @ 3150) * .017 (sine 1 degree) = .4 inches >> no big deal, but then there might be some wind to deal with. Wait for the rodent to lay flat & shoot at the upwind end. 5-degree cant would be almost one gopher width at 600. Some guys on this forum shoot golf balls at 1,000 and they would be real deadly on gophers @ 600. 1 (sine 90 deg, rifle resting on left side, bolt up) * 96 (mid-range trajectory) = 96 inches, 8 feet, elevation now windage. .707 (sine 45 deg) * 96 (mid-range trajectory) = 68 inches, 5.7 feet, rifle cant half way between 90 and 0 deg. .5 (sine 30 deg) * 96 (mid-range trajectory) = 48 inches, 4 feet, rifle cant 30 degrees Berger data with same .308 215 gr. @ 2800 is real close. This assumes a 1,000 yard zero as sights would be adjusted to hit at this range. Mid-range trajectory about 93 inches. [ATTACH]395955[/ATTACH] [/QUOTE]
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Where does Rifle cant begin to matter?
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