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Posted: 6/15/2005 6:27:16 PM EDT
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These are rough values for Q3131A from 20" and 16" barrels. Obviously temperature, humidity and other factors will play a role. 14.5" barrels should use the 16" stats as the wind drift difference between the two is negligible. These are to meant to help new shooters get a rough idea of how much windage they need to apply to shoot at longer ranges. Ballistics calculators and shooting logs will give you better and more precise data if you need it. If wind is coming from directly ahead or behind, do not apply any adjustment for wind. Otherwise apply the listed value into the direction the wind is coming from to compensate for wind drift at that distance with that barrel. In order to clarify the terms used here assume you are facing due north. A slight quarter wind would be a wind from the NNE, NNW, SSE, or SSW. A quartering wind would be a wind from the NE, NW, SE, SW. A crosswind would be a wind from the E or W. For every 5mph in wind apply the following value into the wind: 20" Slight quarter: 1" @ 200yds, 2.2" @ 300yds, 4.2" @ 400yds, 7.2" @ 500yds, 11.1" @ 600yds Quarter: 1.7"@200yds, 4.2"@300yds, 8"@400yds, 13.5"@500yds, 21"@600yds Crosswind: 2.4"@200yds, 5.9"@300yds, 11.3"@400yds, 19.1"@500yds, 29.7"@600yds 16" Slight quarter: 1"@200yds, 2.4"@300yds, 4.5"@400yds, 7.6"@500yds, 11.8"@600yds Quarter: 1.8"@200yds, 4.4"@300yds, 8.5"@400yds, 14.3"@500yds, 22.2"@600yds Crosswind: 2.6"@200yds, 6.3"@300yds, 12"@400yds, 20.3"@500yds, 31.4"@600yds Example: If I am facing north and the wind is out of the SE at 10mph, I would need to to aim my 16" HBAR 8.8" to the right of the target in order to compensate for the wind. |
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