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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to determine "best" load for long range shooting
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<blockquote data-quote="Timberwolfhd" data-source="post: 327234" data-attributes="member: 20122"><p>gun)I shoot F-Class competition. You need a good chronograph! You then fire your different loads in 10 shot groups, then use the load that has the LOWEST SD (standard deviation). The "best" loads are the ones that have an SD of 20 - 25 fps or less. The reason is this: A deviation of 50 fps can make your shot have a vertical dispersion of 7 inches or more at 1000 yds, which will mean a complete miss or a wounded animal for you to chase.</p><p> If you get more than 1 load with an SD of below 20 fps, fire them at 100 yds to see which one is more accurate. This tells you which load your gun "likes" better.</p><p> As far as the horizontal spread goes, it takes practice at reading the wind and compensating for it, either by scope adjustment or hold. There is no magic "formula" for learning wind reading, the more you do it, the better you get at it.</p><p> I started in F-Class by reading a couple (then a 3rd) books that I highly recommend: "Reading the Wind and Coaching Techniques" by M/Sgt James Owens, "Prone and Long-Range Rifle Shooting" by Nancy Tompkins, and "Applied Ballistics for Long Range Shooting" by Bryan Litz.</p></blockquote><p></p>
[QUOTE="Timberwolfhd, post: 327234, member: 20122"] gun)I shoot F-Class competition. You need a good chronograph! You then fire your different loads in 10 shot groups, then use the load that has the LOWEST SD (standard deviation). The "best" loads are the ones that have an SD of 20 - 25 fps or less. The reason is this: A deviation of 50 fps can make your shot have a vertical dispersion of 7 inches or more at 1000 yds, which will mean a complete miss or a wounded animal for you to chase. If you get more than 1 load with an SD of below 20 fps, fire them at 100 yds to see which one is more accurate. This tells you which load your gun "likes" better. As far as the horizontal spread goes, it takes practice at reading the wind and compensating for it, either by scope adjustment or hold. There is no magic "formula" for learning wind reading, the more you do it, the better you get at it. I started in F-Class by reading a couple (then a 3rd) books that I highly recommend: "Reading the Wind and Coaching Techniques" by M/Sgt James Owens, "Prone and Long-Range Rifle Shooting" by Nancy Tompkins, and "Applied Ballistics for Long Range Shooting" by Bryan Litz. [/QUOTE]
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How to determine "best" load for long range shooting
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