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  • Reading the wind

    Reading the wind

    Hey Folks,

    I wanted to post a thread for those of you that have trained here at CVT and for the ones that can't make it. This will be a review of wind reading basics. First thing is our formula: Inches X wind speed / by 1 minute of our distance. We have to have a range card that breaks our wind down to 1 mph. So that it shows us how many inches our bullet will move for every 1 mph of wind speed. Here's link to a ballistic chart you can use. You can fill in the blanks but be sure to only use 1 mph of wind speed rather than 10 mph.http://www.eskimo.com/~jbm/calculations/tr.../traj_card.html

    Now it should look something like this:




    Now the one on the left is for 40 degrees and under. The one on right is any over 70 degrees. Remember these are just a starting place. Now notice the column that reads 1 mph wind. Now scroll down to 600 yards. Both cards say at 600 yards your bullet will move 3" (inches) for every 1 mph of wind speed. So if we have a wind speed of 5 mph all we do is multiply 3" x 5 mph= 15" So now we know our bullet will move 15 inches in a 5 mile per hour wind at 600 yards. Now we need to change this...
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    Last edited by nate; 01-03-2015, 04:32 PM.

  • Scope Ring Lapping

    Scope Ring Lapping

    First, mount up your scope base and the bottom half of the rings.

    There is a bit of disagreement as to whether or not you need to lap the top halves of the rings as well as the bottoms. Personally, I lap the tops and bottoms. My theory is that if there is a flaw in the top halves, it could still cause problems when I tighten the scope up in my freshly lapped bottoms. Plus, if done correctly, it won't hurt anything, so why not do it.
    1. Apply the lapping compound to the lap and the bottom halves of the rings.

    2. Install the top halves of the rings. I make sure that I have an even gap on both sides between the tops and bottoms of the rings. I want to snug the tops down enough that I can just work the lap.
    You'll want to mark the top halves of the rings so that if you ever take them off, you can get them back on exactly as they were. You'll want to keep them not only as front and rear, but also keep them oriented in the same manner (i.e., the front of the front, the front of the back). I do this by filing 1 small...
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