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Long Range Hunting & Shooting
Need Help, tune mv or bc
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<blockquote data-quote="B-P-UU" data-source="post: 1545722" data-attributes="member: 29114"><p>I would start by changing to a solid 100 yd zero. Don't worry about your barrel length vs. whats on the box or your velocity vs. what's on the box. Your goal is to get your data to work. As others have stated, its generally best to start by tweaking your MV whether you agree with it or not. It has a far better effect inside of 600 yds. With that said, 75 fps is quite a bit and I think there is something else going on. I have little experience with swaro.. are they IPHY or MOA adjustments?</p><p></p><p>The Applied Ballistics guys recommend truing MV @ 1.2 MACH. So determine the distance at which your rounds hits 1.2 Mach (1125 fps x 1.2 = 1,350 fps and shoot at that range). tweak velocity to get it your come-ups to match what you see on target. For me, that's around 1,100 yds for my dasher. I've had pretty good results using this method. </p><p></p><p>Others prefer to adjust velocity in the 'linear' portion of the drop curve (say, inside of 5-600 yds) and BC for the non-linear (700+). I would not recommend solely adjusting BC at the distances you are shooting.</p></blockquote><p></p>
[QUOTE="B-P-UU, post: 1545722, member: 29114"] I would start by changing to a solid 100 yd zero. Don't worry about your barrel length vs. whats on the box or your velocity vs. what's on the box. Your goal is to get your data to work. As others have stated, its generally best to start by tweaking your MV whether you agree with it or not. It has a far better effect inside of 600 yds. With that said, 75 fps is quite a bit and I think there is something else going on. I have little experience with swaro.. are they IPHY or MOA adjustments? The Applied Ballistics guys recommend truing MV @ 1.2 MACH. So determine the distance at which your rounds hits 1.2 Mach (1125 fps x 1.2 = 1,350 fps and shoot at that range). tweak velocity to get it your come-ups to match what you see on target. For me, that's around 1,100 yds for my dasher. I've had pretty good results using this method. Others prefer to adjust velocity in the 'linear' portion of the drop curve (say, inside of 5-600 yds) and BC for the non-linear (700+). I would not recommend solely adjusting BC at the distances you are shooting. [/QUOTE]
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Need Help, tune mv or bc
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