You might have to zero it 300, 400, or 500 yards. If you put a 20 minute of angle rail on here, you’re going to use up all your adjustment area and you may not get a zero at 100/200 yards. Now, it’s important to note that the final 10% of any skill is the least reliable part of the adjustment in any turret. You would have 20 minutes of angle of upwards elevation adjustment, 20 MOA of downward elevation adjustment. When you’re zeroed you’re approximately dead center of this mechanism depending on your scope. It’s important to understand that your reticle floats on a turret, or there’s a couple different mechanisms that scopes use, but essentially, your reticle is floating inside your optic and can be adjusted left/right for windage, up/down for elevation. What this means is that when your scope is zeroed at 100 or 200 yards, you’re going to be right in the middle of that adjustment. Typically those scopes have roughly 40 minutes of angle of internal elevation adjustment. Something that you would typically see in like _00:04:22 Barry-X2 or something like that. First off, let’s say you just have a one inch two standard duplex reticle. Let’s take a look at a couple of different optics and see when a Zero MOA rail would be appropriate and when a 20 MOA rail would be appropriate. All right, so we’ve established that whether you go Zero or 20 MOA is a function of your optic. Let’s dive into what’s happening inside your optic as we’re manipulating this bore sight relationship. As you can see here, whether you get a Zero or 20 MOA rail has nothing to do with your rifle.
What we’re doing is we’re gaining unused MOA in your scope. All right, as I said earlier, we’re using the optic mount to manipulate the barrel site relationship and with a 20 MOA rail, and this is a little exaggerated guys so don’t think we’re going to be driving your scope into your barrel, but with a 20 MOA rail, your line of sight is now downward compared to the bore.Ģ0 minutes of angle equals one third of a degree or. You’ve kind of asked yourself, why do we need 20, 30, 40 MOA mounts when this is worth for so long? Let’s take a look at that. With the Zero MOA rail, your line of sight is parallel to the bore of your rifle. Zero MOA optic mount or a 20 MOA optic mount? All we’re doing with the rail is we’re manipulating the line of sight. What you have here is you have your line of sight. Zero MOA rails or Zero MOA optic mounts have been the way we’ve mounted modern optics to the modern rifle since the modern optic and the modern rifle. Let’s see how this actually applies to our firearm. All right, we’re not circumnavigating the globe. Let’s dive in to how this relates to the optic on your rifle. You can see, as we extend out from this circle, that linear gap becomes larger. How does that relate to a linear unit of measurement? One minute of angle at 100 yards is roughly 1.047”, 200 yards double that, 300 yards triple that. The very exaggerated blue line here, 20 MOA is a very, very thin sliver of the circle here. One minute of angle has 60 seconds to it, and then you break that down into further decimal points as well. Now, 360° could be broken down into little bits. Remember High School geometry, there’s 360° in a circle. It’s been used to circumnavigate the world for as long as we’ve had compass roads. Where does MOA come from? MOA comes from actually the compass roads. Many times when somebody asks which rail they want to go with, actually they were referring to the height and what we’re actually referring to is the built in cant that we cut into the rail. Alright, so what is MOA? MOA is an angular unit of measurement. That is, do I get a Zero MOA optic mount or a 20 MOA optic mount? In order to explain why we make the suggestions that we make, I thought I’d take a minute to explain what Minute of Angle is, how it affects the rifle system, and why you want to choose one over the other. I thought I’d take a moment and address the most common question we receive. Hi, Jason McHann here with MOUNTAIN TACTICAL®.
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