HuntingNet.com Forums - Using Them Marks on the PowderHorn

Quote:

Originally Posted by cayugad (Post 3909493)

You might remember I said the scope had a lot of numbers on the top that really made little sense to me. I know so many clicks move the scope to where I want. But look at the dial on that thing. I wish the instructions that came with the scope would have explained more about the scope. But they were very limited in what they told.

Reading what Dave wrote here piqued my interest. The scopes that the Leupold Custom Shop worked for me, came with 2 dials. One was engraved for a specific bullet and load. The other dial was engraved like the dial on the PowderHorn scope, however the marks are on the edge instead of on the top.

It took me a while to figure out how to put the dial to use. When i awoke this morning, i decided to use the markings on the dial to have the Mountaineer try to hit a target at 400 yard.

First step was to install the dial on the scope mounted to the Mountaineer. This i did using that small hex wrench. The dial was installed so the zero on the dial was aligned with the mark on the scope. Knowing the rifle was sighted in at exactly 100 yard. This meant that zero on the dial equaled zero at 100 yard.

Then i needed to know the ballistics of the bullet i was going to use to try and hit the target at 400 yard.

These dial are engraved with 1/4 moa marks. These marks are close to being 1/4" at 100 yard. The chart shows that in order to be zero at 400 yard, the bullet needs to be 23.81" high at 100 yard. Them numbers on the top of the PowderHorn dial, and on the side of the Leupold dial are nearly the same as inches at 100 yard. One revolution of these dial is nearly 15". If turned correctly the bullet will hit about 15" high at 100 yard when turned one revolution. Note the dial on this scope has been turned 8 3/4 marks further than 1 revolution.

So, in theory this rifle should be hitting 23 3/4" high at 100 yard, and dead on at 400 yard.

The two holes to the right were punched by the Mountaineer using the pictured dial setting. This was the first attempt using the Mountaineer at 400 yard. The cds dial normally used on this scope can only be turned 1 revolution stop to stop, so cannot be set to shoot further than 325 yard. This moa dial has no stops, and can be rotated more than one turn. This allows for shooting at 400 yard.