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Posted: 10/19/2008 3:36:16 PM EDT
| I was setting in the doctors office the other day and was half into a read in one of the mags when they called me about snipers in the vietnam war shooting the M14 with the issued 3x9 scope. They were talking about a method they used to judge the range of thier target. The points viewed were the distance from the beltline to the top of the head of the target set somewere in the viewed crosshairs and once it was set they could look at the magnification setting and it told the distance. Did anyone else read or know about this method? |
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The reasoning behind using the numbers on the power selector ring is that there is a generalization that a specific number on the ring equates to viewing an object at a closer range. For example, you're viewing an object at 100 yards with your naked eye. Now you switch to a riflescope on 2X. It will look to you as if the object is at 50 yards. On 3X power, the object will look like it's at 33 yards, etc. Remember, this is just a generalization. It's more the way "power" of a scope is taught to people. This generalization can also be turned around. That is, viewing an object with at least one known, determined dimension. The size of the object never changes (it's a constant,) but its image in the scope does. You relate the image size to some portion of the reticle (which is also a constant.) Therefore the only variable is the distance of the object. The next step is relating some portion of the reticle pattern to the known dimension of the object's image in the scope. By changing power selector ring to increase or decrease image size until it matches the chosen portion of the reticle pattern, and then reading the number of the power selector ring at this time, gives you an estimate in hundreds of the distance to the object. So in your description of the article you read, the snipers are using the fact that the average male's torso is consistent (I think they use 1 meter or 1 yard, don't remember.) They relate this constant to the constant of the portion of the reticle chosen, fondle the power selector ring 'til the portion of the reticle lines up with the torso, and read the number on the power selector ring multiplying it be 100. It's gives an estimate of the distance to target. Hope this helps. |
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