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Rifles, Reloading, Optics, Equipment
Equipment Discussions
Different MOA bases
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<blockquote data-quote="britz" data-source="post: 216714" data-attributes="member: 7865"><p>The reason for different sized bases is that scopes often don't allow enough elevation to reach out long range. If you are using a scope that has 35 MOA adjustment (which isn't uncommon) that means you have approximately 17.5 moa up and 17.5 moa down. We are only conserned with the up because we want to reach farther right? So if you are shooting a 308 at 600 yards you will need to increase your elevation about 16 MOA from a 100 yard sight in. If you want 700 yards then you would need something like 21 MOA - about 4 MOA more than you have adjustment. SO if you put in a 10 MOA rail, you will have started with your scope adjusted down allowing you to use more of your scopes internal adjustment to go up when shooting at long range. If your scope has 40 or 50 MOA adjustment, then you may want to use a 20 MOA rail because you would be able to use almost all of you adjustment to increase your range. However, if you only have 35 MOA of adjustment, you might not want a full 20 MOA rail because you wouldn't be able to sight in for less than, say 350 yards.</p><p></p><p>The Picatinny rail is a very strong reliable system that is very popular. It is the system that the military uses.</p></blockquote><p></p>
[QUOTE="britz, post: 216714, member: 7865"] The reason for different sized bases is that scopes often don't allow enough elevation to reach out long range. If you are using a scope that has 35 MOA adjustment (which isn't uncommon) that means you have approximately 17.5 moa up and 17.5 moa down. We are only conserned with the up because we want to reach farther right? So if you are shooting a 308 at 600 yards you will need to increase your elevation about 16 MOA from a 100 yard sight in. If you want 700 yards then you would need something like 21 MOA - about 4 MOA more than you have adjustment. SO if you put in a 10 MOA rail, you will have started with your scope adjusted down allowing you to use more of your scopes internal adjustment to go up when shooting at long range. If your scope has 40 or 50 MOA adjustment, then you may want to use a 20 MOA rail because you would be able to use almost all of you adjustment to increase your range. However, if you only have 35 MOA of adjustment, you might not want a full 20 MOA rail because you wouldn't be able to sight in for less than, say 350 yards. The Picatinny rail is a very strong reliable system that is very popular. It is the system that the military uses. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Equipment Discussions
Different MOA bases
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