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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Long Range scope set-up help
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<blockquote data-quote="SBruce" data-source="post: 534345" data-attributes="member: 21068"><p>The difference you're seeing at 100 yds likely isn't because of the BC of the bullet. That usually doesn't have much effect till you get out past 300 yds.</p><p> </p><p>I couldn't find the BC of the 175 A-Max, but I did find one for the 178 A-Max.</p><p> </p><p>OK, <u>just based on advertised factory ammo velocities</u>; the 165 should be able to get about 2800'/sec. The 178 should maybe get 2650.?</p><p> </p><p>We'll assume 100 yd zero and standard atmosphere at 1350' elevation.</p><p> </p><p>The ballistic program says you'll need 33 minutes to get to 1000 with the 168 going 2800'/sec. Same program says you'll need 36 minutes to get to 1000 with the 178 going 2650'/sec. The BC of the 178 is only slightly more than the 168 according to the program, so it doesn't help enough to make it worth while. If you could push it at 2750 or so, it would be better.</p></blockquote><p></p>
[QUOTE="SBruce, post: 534345, member: 21068"] The difference you're seeing at 100 yds likely isn't because of the BC of the bullet. That usually doesn't have much effect till you get out past 300 yds. I couldn't find the BC of the 175 A-Max, but I did find one for the 178 A-Max. OK, [U]just based on advertised factory ammo velocities[/U]; the 165 should be able to get about 2800'/sec. The 178 should maybe get 2650.? We'll assume 100 yd zero and standard atmosphere at 1350' elevation. The ballistic program says you'll need 33 minutes to get to 1000 with the 168 going 2800'/sec. Same program says you'll need 36 minutes to get to 1000 with the 178 going 2650'/sec. The BC of the 178 is only slightly more than the 168 according to the program, so it doesn't help enough to make it worth while. If you could push it at 2750 or so, it would be better. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Long Range scope set-up help
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