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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 hundredths or sometimes thousandths of an inch. For example, a 45 caliber firearm has a barrel diameter of .45 of an inch. Barrel diameters can also be expressed using metric dimensions, as in "9mm pistol." When the barrel diameter is given in inches, the abbreviation "cal" (for "caliber") can be used. For example, a small-bore rifle with a diameter of 0.22 inches can be referred to as .22 or a .22 cal; however, the decimal point is generally dropped when spoken, making it a "twenty-two caliber" or a "two-two caliber rifle".
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 a bullet to closely match the groove diameter of a barrel to ensure a good seal.
While modern cartridges and cartridge firearms are generally referred to by the cartridge name, they are still lumped together based on bore diameter. For example, a firearm might be described as a "30 caliber rifle", which could be any of a wide range of cartridges using a roughly .30-in projectile; or a "22 rimfire", referring to any rimfire cartridge using a 22-cal projectile.
Firearm calibers outside the range of 17 to 50 (4.5 to 12.7 mm) exist, but are rarely encountered. Wildcat cartridges, for example, can be found in 10, 12, and 14 cal (2.5, 3.0, and 3.6 mm), typically used for short-range varmint hunting, where the high-velocity, lightweight bullets provide devastating terminal ballistics with little risk of ricochet. Larger calibers, such as .577, .585, .600, .700, and .729 (14.7, 14.9, 15.2, 17.8, & 18.5 mm) are generally found in proprietary cartridges chambered in express rifles or similar guns intended for use on dangerous game. The .950 JDJ is the only known cartridge beyond 79 caliber used in a rifle.
In some contexts, e.g. guns aboard a warship, "caliber" is used to describe the barrel length as multiples of the bore diameter. A "5-inch 50 calibre" gun has a bore diameter of 5 in (12.7 cm) and a barrel length of 50 times 5 in = 250 in (6.35 m).
I am liquidating my reloading supply business - These are better prices than you can buy direct from Montana Gold Bullets - I will meet FTF for purchases over $50.00 Cash along I-5, 78th Street to Woodland by appointment between 4:00 & 5:00 pm - I will ship for the additional charge listed - I...
OK everyone wants to know all the info to help pick a caliber.
No need really as YOU will give me your reasons for which one
I'm thinking of a Ruger American preditor in 223,6.5 creedmore, or 243
I already have a 223 'wylde' AR. And a 7mm mag. The 223 would compliment the AR but that's kinda...
I have several full buckets of lead just waiting to be "heated up" and thrown down range. I cast for most of my pistols but now looking for someone with experience in the AR platform. Plus I'm always needing an excuse to build/assemble another one.
Hello all,
I have been shooting a Remington 700 chambered in 308 win and am wanting to get into another long gun platform but in a different caliber. I would like to hear your guys suggestions and experiences.
Looking for a bolt action, don't care about cost of ammo, effective distance a plus+
Over the years Ive been cautioned by other hunters for using the 25-06 to hunt elk with as being "too light".
So I just did a quick and very rough comparison of 3 different common calibers I would call elk calibers with factory ammunition from Hornandy and Federal websites. I compared velocity...
Excellent used condition Beretta 950 BS .25 BUG purchased used in 2002. No idea what the count fired through before purchase was. A total of 1-2 mags (16-18 rounds) were fired after purchase to make sure was in good working order before being cleaned. No additional rounds have been fired through...
Fordiscussion, and let's make this simple, a Pistol Caliber is simply a caliber most commonly used in Pistols, ranging from revolvers to handguns (let's not talk about the special ones that uses rifle cartridges..), and a Rifle Caliber being a caliber used most commonly in Rifles as opposed to...
***SOLD***
This is a Navy Arms, manufactured by Pietta in 1974, .44 caliber 1860 replica.
It sports an all brass frame and a 7.25" barrel. It appears to have been fired very little, if at all.
Comes with presentation box, but sadly I don't have the powder flask, lead balls, ball mold and...
270 cal Nosler Accubond 110 gr, 46 bullets, $23
Sierra Pro-Hunter 110 gr, 81 bullets, $20
Speer Varmit 100 gr hp, 174 bullets, $44
All shipped for $95
or Pick up in Junction City for $85.
I have up for sale my Dillon 550 and I'll include a caliber conversion for either 9mm, .45, or .223. You will get the machine plus everything that comes with the machine: primer system for large or small primers, primer alarm, large and small powder bars, powder measure, tool head, and case...
A neat old .22 lever action Marlin rifle manufactured way back in 1897. The Cody Museum identified the serial number as a first-year gun. Bore is not pretty, but it does load and shoot with "minute-of-can" accuracy. This gun has been enjoyed for over a hundred years and is a nice collectable...
Easy Question:
What is the smallest caliber you will trust your and your family/friends life on?
I put this in off topic because there are people who only keeps guns at home so Carry didn't seem to completely fit & this way we can go on tangents if needs be.
***Hot Topic***:eek:
Please...
The Barrett Model 82A1, manufactured at the Barrett facility in Murfreesboro, Tennessee was just named the Tennessee state rifle.
http://money.cnn.com/2016/02/26/news/companies/barrett-rifle-tennessee/index.html