help me understand

[fetchingdrake]

I hope I have placed this in the right area.

Can you help me understand MOA and come up with regards to scopes.

I understand moa is Close to 1" @100 and so on.

Lets say I have my gun zeroed at 100 yards, Lets just say that I know the target is 430 yards away and that I know the bullet drop is 24" at 500 yards. The scope I am using is in 1/4" adjustments

Is their an easy way to dial this in....I know that their are many other factors but lets just say these are all the variables to help me understand the basics

Any input would be great

 

[John Marshall]

A circle is broken up into degree's, 1 =(singular) minutes (60 divedend) and seconds (60 divedend). So MOA is an angular\arc measurment. It is essentially a divedend of 360 degree's. So if your rifle drops 2 " at 200 yards and is zeroed at 100 then you will need to shoot 1 MOA high. Remember if 1" of MOA = 1" at 100 yards then it will equal 2" at 200 yards and so on.

 

[NormB]

I hope I have placed this in the right area.

Can you help me understand MOA and come up with regards to scopes.

I understand moa is Close to 1" @100 and so on.

Lets say I have my gun zeroed at 100 yards, Lets just say that I know the target is 430 yards away and that I know the bullet drop is 24" at 500 yards. The scope I am using is in 1/4" adjustments

Is their an easy way to dial this in....I know that their are many other factors but lets just say these are all the variables to help me understand the basics

Any input would be great

For ease of calculation: say the bullet drops 25" at 500 yds, that's 5 mins at 500yds, since 1 min=about5 inches at 500 yds. See previous post.

So if your rifle is zeroed at 100 yds, you would have to dial the scope up 5 main divisions on the vertical turret.

Your scope is calibrated in 1/4 inch or 1/4min clicks, so you should have 4 clicks per main division or 20clicks per 5 divisions or 5 minutes to hit a target at 500yds.

You don't give enough info to exactly hit 420 yds, but you might want to try 4 and 1/4 main divisions or 17 clicks.

NormB

 

[Dave42]

First you need to know how low your bullet will impact at 430 yards if you want to adjust your scope to compensate for the drop. Knowing the bullet impact point at 500 yards will not help. A good ballistics program will help you to predict what the drop will be at what ever distance you choose to shoot but the only way to truly know is to shoot at that distance.

All that being said if you know or have predicted what your impact point at 430 yards will be (say 18.3") all you need to do is calculate how many clicks you need to dial up.

@430 yards 1MOA = 4.3"

18.3" Drop / 4.3" per MOA = 4.25 MOA (aprox.)

Now just remember that your scope adjustment is .25 MOA per click so....

4.25MOA / .25MOA per click = 17clicks

 

[Longshot]

The easiest way to get a hit is to have already zeroed you rifle from 100m to 1000m.Record the data for each distance.Either the number of clicks up from the previous,or the number on the dial.When you range a target you look at your data,see the dope that is the closest and make adjustments from there.Saves you trying to do the math on the spot.