What is MOA

Many rifle manufactures have guarantees, not all give MOA or Sub MOA out of the box.  My Vanguard 223 came with just such a guarantee.  I thought I would throw up the description given by wikipedia to cover it properly.


The arcminute is commonly found in the firearms industry and literature, particularly that concerning the accuracy of rifles, though the industry tends to refer to it as minute of angle. It is popular because 1 MOA subtends approximately one inch at 100 yards, a traditional distance on target ranges. A shooter can easily readjust his rifle scope by measuring the distance in inches the bullet hole is from the desired impact point, and adjusting the scope that many MOA in the same direction. Most target scopes designed for long distances are adjustable in quarter (¼) or eighth (⅛) MOA “clicks”. One eighth MOA is equal to approximately an eighth of an inch at 100 yards or one inch at 800 yards.

Calculating the physical equivalent group size equal to one minute of arc can be done using the equation: equivalent group size = tan(MOA/60) × distance. In the example previously given and substituting 3600 inches for 100 yards, 3600 tan(1 MOA/60) inches = 1.0471975511966 inches.

In metric units 1 MOA at 100 meters = 2.908 centimeters.

Sometimes, a firearm’s accuracy will be measured in MOA. This simply means that under ideal conditions, the gun with certain ammunition is capable of producing a group of shots whose center points (center-to-center) fit into a circle, the average diameter of circles in several groups can be subtended by that amount of arc. (E.g.: a “1 MOA rifle” should be capable, under ideal conditions, of shooting an average 1-inch groups at 100 yards, a “2 MOA rifle” a average 2-inch groups at 100 yards, etc.) Some manufacturers such as Weatherby and Cooper offer actual guarantees of real-world MOA performance.

Rifle manufacturers and gun magazines often refer to this capability as “Sub-MOA”, meaning it shoots under 1 MOA. This is typically a single group of 3 to 5 shots at 100 yards, or the average of several groups. If larger samples are taken, i.e. more shots per group, then group size typically increases.

Published in: on October 2, 2009 at 1:22 pm  Leave a Comment  
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You can Hunt or Target Shoot with 223

Its a versatile round to shoot,  that’s what I was told before I bought my Weatherby Vanguard .223    The vanguard I own is an awesome rifle, so much so that I intend to buy another caliber in the same weapon, although I will have to get different stocks so I don’t mix them up.  The 223 round is great for hunting or target shooting, I find it most effective to 300m with a 55 Grain solid (Spear Point) and a 45 grain hollow point.  The ironic part is that store bought 223 ammo is just as good as the reloaded ammunition.  Go figure !

Published in: on September 27, 2009 at 1:15 pm  Leave a Comment  
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In the Beginning, Remington created the 223.

Well it was after 222.

So I woke up one day and decided, wouldn’t it be cool to have a site dedicated to my favorite caliber of bullet?

The .223 also known as the 5.56 x45 (NATO).

It is my intention to build a community of shooters who enjoy shooting with 223, whether you like Sako, Winchester, Weatherby, Remington, Ruger, Tikka or any other brand I haven’t mentioned there is a 223 out there for you.

It’s a versatile round and it’s a great day shooting it.  I hope you will join us in making the Caliber 223 website the biggest resource in the world on 223.

In the coming months we will research, present, find and salute all that this awesome ammo has to offer.

Published in: on September 21, 2009 at 12:14 pm  Leave a Comment