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Hunting
Long Range Hunting & Shooting
Novice: 7RM out to 600 yds.
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<blockquote data-quote="kiwi3006" data-source="post: 291283" data-attributes="member: 8927"><p>Inside 600 yards BC AND velocity are important. </p><p> </p><p>A 140 Nosler BT or Accubond at 3150 (BC 0.485) zeroed at 100 yds 10mph wind</p><p>at 600 yds Elevation 10.6 MOA Windage 3.7 MOA</p><p>A 162 A-max at 3060 (BC 0.625) zeroed at 100 yds 10 mph wind</p><p>at 600 yds Elevation 10.3 MOA Windage 2.9 MOA</p><p> </p><p>The 140 gr is giving up 0.8 MOA windage, which means it will drift 4.8 inches more at 600 yards.</p><p> </p><p>For the 7mm mag the best BC is over 0.6, 162 a-max 0.625 and the 168 berger 0.617. The heavier projectiles tend to have a higher BC but the 7mm mag has trouble sending them out fast enough to get the benefit of the higher BC inside of 600 yards.</p><p> </p><p>You might be able to send the 140 gr out faster, possibly 3200 fps, depending on barrel length. The velocity for the 162 a-max is what I get from my 26" barrel. </p><p> </p><p>Once you start looking at ballistic tables etc it is real easy to get caught up in detail. The best way to do it, I believe, is to let the rifle tell you what it likes and work your drop charts from there. </p><p>Pick a couple of bullets you like the sound of, find the best one for your rifle and then go out and shoot as much as you can out to 600 yards, that will make more of a difference than the one with the best BC.</p><p> </p><p>Stu.</p></blockquote><p></p>
[QUOTE="kiwi3006, post: 291283, member: 8927"] Inside 600 yards BC AND velocity are important. A 140 Nosler BT or Accubond at 3150 (BC 0.485) zeroed at 100 yds 10mph wind at 600 yds Elevation 10.6 MOA Windage 3.7 MOA A 162 A-max at 3060 (BC 0.625) zeroed at 100 yds 10 mph wind at 600 yds Elevation 10.3 MOA Windage 2.9 MOA The 140 gr is giving up 0.8 MOA windage, which means it will drift 4.8 inches more at 600 yards. For the 7mm mag the best BC is over 0.6, 162 a-max 0.625 and the 168 berger 0.617. The heavier projectiles tend to have a higher BC but the 7mm mag has trouble sending them out fast enough to get the benefit of the higher BC inside of 600 yards. You might be able to send the 140 gr out faster, possibly 3200 fps, depending on barrel length. The velocity for the 162 a-max is what I get from my 26" barrel. Once you start looking at ballistic tables etc it is real easy to get caught up in detail. The best way to do it, I believe, is to let the rifle tell you what it likes and work your drop charts from there. Pick a couple of bullets you like the sound of, find the best one for your rifle and then go out and shoot as much as you can out to 600 yards, that will make more of a difference than the one with the best BC. Stu. [/QUOTE]
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Novice: 7RM out to 600 yds.
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