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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm Rem. Mag vs 300 Win. Mag
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<blockquote data-quote="Stgraves260" data-source="post: 1177461" data-attributes="member: 19988"><p>Here's the math. 260 Rem 140 Berger BC of .612 but had to lower the BC do to distance. Corrected BC .600. 1760 yards 35 degree angle = .819 cosine. Shoot to range was 1450 yards. You take the known distance and multiple the cosine. That gives you the shoot to range. The rifle is a 260 Remington 27" Kreger Barrel 1&8 twist. Hodgon 4350 powder 42.5grns. = 2975fps around 1050 ft-lbs energy and takes just over 3 seconds to reach its target. I was shooting true north to eliminate coriolas. The moa was dialed in at 49.6 MOA's. I adjusted for the twist rate of the barrel and the 2-3mph wind. Wind hold off was 14.5 moa. And yes you do have to hold for your wind for the 1760yards and not the 1450yards. It was about 100 degrees outside and I was at sea level in Brawlew California. I shoot in the dessert with my pop and family every Thanksgiving. All is welcome. And yes this is an invite. Just bring lots of water.</p></blockquote><p></p>
[QUOTE="Stgraves260, post: 1177461, member: 19988"] Here's the math. 260 Rem 140 Berger BC of .612 but had to lower the BC do to distance. Corrected BC .600. 1760 yards 35 degree angle = .819 cosine. Shoot to range was 1450 yards. You take the known distance and multiple the cosine. That gives you the shoot to range. The rifle is a 260 Remington 27" Kreger Barrel 1&8 twist. Hodgon 4350 powder 42.5grns. = 2975fps around 1050 ft-lbs energy and takes just over 3 seconds to reach its target. I was shooting true north to eliminate coriolas. The moa was dialed in at 49.6 MOA's. I adjusted for the twist rate of the barrel and the 2-3mph wind. Wind hold off was 14.5 moa. And yes you do have to hold for your wind for the 1760yards and not the 1450yards. It was about 100 degrees outside and I was at sea level in Brawlew California. I shoot in the dessert with my pop and family every Thanksgiving. All is welcome. And yes this is an invite. Just bring lots of water. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm Rem. Mag vs 300 Win. Mag
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