Ammo Caliber

In guns, particularly firearms, caliber or calibre is the approximate internal diameter of the barrel, or the diameter of the projectile it fires. In a rifled barrel, the distance is measured between opposing lands or grooves; groove measurements are common in cartridge designations originating in the United States, while land measurements are more common elsewhere. Good performance requires that a bullet closely match the groove diameter of a barrel to ensure a good seal. When the barrel diameter is given in inches, the abbreviation “cal” is used in place of “inches.” For example, a small bore rifle with a diameter of 0.22 inch is a .22 cal; however, the decimal point is generally dropped when spoken, making it “twenty-two caliber” or a “two-two caliber”. Calibers of firearms can be referred to in millimeters, as in a “caliber of eighty-eight millimeters” (88 mm) or “a hundred and five-millimeter caliber gun” (often abbreviated as “105 mm gun”).

Educational Zone #181 – Product Evaluation – A Rifle Brake for 3gun Nation Competition Guidelines

I got an e-mail from Jeremy from Kahntrol Solutions and he told me that they had designed a couple of new rifle brakes and wondered if I would like to do an evaluation. I said, sure. He sent me a couple of brakes with these design limitations. First was a KST3G threaded ½” – 28 (standard AR-15 threads) with a through hole of up to .243. This brake was designed to fit the 3 Gun Nation rules for competition. The MSRP [...]

Educational Zone #180 – Levi’s Christmas Rifle

My grandson Levi is 7 years old. He has been showing an interest in going hunting with his Mom and Dad, and so we know what that means. He needs a rifle. I surprised him this Christmas with his own rifle. I had been looking for a good used rifle to work over and fix up for him, but while looking for just the right rifle, I had stumbled on this fine specimen. It is an almost brand new Ruger 10-22. It is very clean, from a [...]

Educational Zone #179 – Greek .303 British Military Surplus Ammo

It has been a while since we have seen any .303 British military ball ammo available for sale. It almost brings a tear to my eye when I remember how cheap some of the .303 milsurp was back in the day. I bought a lot of it back then, but I should have “bought it cheap and stacked it deep”. Oh well, one of many regrets. But recently, we saw some Greek .303 British military surplus become available. Cheaper Than Dirt [...]

Educational Zone #178 – Hunter Class Benchrest Rifle

My buddy Boyd came through town last week and was coming from the Gulf Coast Regional Hunter Class Benchrest Competition that was held in Louisiana. He tied in a three-way tie for First place, but won 2nd place due to Xs. He met me at the range and he let me shoot his rifle. It was a very interesting experience and I thought you guys might enjoy learning about the sport. The Hunter Class Benchrest game is just that…..a [...]

Educational Zone #177 – Mexican Match Ammunition

When I used to compete in military rifle matches, competitors were always looking for an “edge” against their competition. However, most of us were on a somewhat limited budget. The matches would supply us with military ball ammo in many cases. Someone once got a great idea about how to “improve” this cheap (free) ammunition. What they came up with was called “Mexican Match”. We are not sure where that name [...]
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