Bullet Size Guide and Instructions
Early appearance of bullets were round in shape balls filled with lead which were loaded down the muzzle of smooth-bore firearms which are then propelled by the ignition of a physically separate charge of black powder. Modern era bullets consist of a cartridge case with the bullet affixed at the front end, the percussion cap or primer at the base, and the propellant powder contained within the tube (skip straight to the bullet size charts).
A bullet is defined as an elongated metal projectile that is shot from a gun barrel. Its components include copper, steel, lead, primer, and rubber. Moreover, a bullet style differs depending on its intended task, bullet caliber is shown by the diameter and weight in both metric and imperial measurements for example; a 55 grain .223 caliber bullet is of the same weight and caliber as a 3.56 gram 5.56 mm caliber bullet.
Bullets tips come in various types and designs they are;open-tip bullets, full metal jackets, soft point bullets, ballistic tips, armor-piercing cartridges, hollow point bullets and many more.
Summary of Bullet Size Guide
- Bullet Size Chart: Components of a cartridge
- Common bullet caliber and types available
- How to Choose the Right Bullet Size
Bullet Size Chart: Components of a cartridge
A cartridge is a an ammunition packaging tool designed to fit into the gun barrel. Bullets are one of the components of the cartridge others include;
Casing– can either be made of copper, brass or steel and it houses all the other components.The original cartridge case was made up of paper but nowadays they are metallic.
Primer– when the firing pin receives impact it ignites the gun powder dividing it into two types the rimfire cartridge where the primer is located in the rim and the centerfire cartridge where the primer is located at the center.
Propellant– it holds the actual power to fuel any firearm. For it to perform accurately grain size and shape influences the burn rate.
Below is a bullet size table with a few examples of matching cartridges:
|Cartridge name||Bullet length in inches and millimeters||Case length in inches and millimeters||Cartridge length in inches and millimeters|
|.41 Short Colt||0.40 inches 10.2 millimeters||0.65 inches 16.5 millimeters||0.91 inches 23.1 millimeters|
|2.7 mm Kolibri (2mm Kolibri, 2.7*9mm)||0.11 inches 2.7 millimeters||0.37 inches 9.4 millimeters||0.43 inches 10.9 millimeters|
|.22 Long Rifle (.22 LR 22 Stinger)||0.22 inches 5.7 millimeters||0.59 inches 15.1 millimeters||0.97 inches 24.8 millimeters|
|.22 Remington Jet (22 Centerfire Magnum)||0.22 inches 5.7 millimeters||1.28 inches 32.5 millimeters||1.58 inches 40.1 millimeters|
|.256 Winchester Magnum||0.25 inches 6.5 millimeters||1.3 inches 33.0 millimeters||1.63 inches 38.9 millimeters|
|25 ACP (25 Auto Colt Pistol, 6.35 Browning)||0.25 inches 6.4 millimeters||0.62 inches 15.7 millimeters||0.91 inches 23.1 millimeters|
|7.62mm Tokarev (7.62*25mm)||0.31 inches 7.8 millimeters||0.97 inches 24.6 millimeters||1.35 inches 34.3 millimeters|
|.32 S&W||0.31 inches 7.9 millimeters||0.61 inches 15.5 millimeters||0.92 inches 23.4 millimeters|
|.32 H&R Magnum||0.31 inches 7.9 millimeters||1.08 inches 27.4 millimeters||1.35 inches 34.3 millimeters|
|9mm Japanese revolver (9*22mmR Type 26)||0.35 inches 8.9 millimeters||0.86 inches 21.8 millimeters||1.21 inches 30.7 millimeters|
|9mm Parabellum(9*19mm Luger, 9mm NATO)||0.35 inches 9.0 millimeters||0.75 inches 19.2 millimeters||1.17 inches 29.7 millimeters|
|.38 ACP(38 Auto, 9*23mmSR||0.36 inches 9.1 millimeters||0.9 inches 22.9 millimeters||1.28 inches 32.5 millimeters|
Common bullet caliber and types available
A gun caliber is the internal diameter of a barrel in addition with the diameter of the bullet. Its measurement consists of inches and millimeters.
Moreover, the most popular caliber is the 9-millimeter measurement which has the recoil at very low proximites and its usually preferred by many guns. Other variety of calibers are; .380 ACP, 40 S&W, .45 ACP and many others.
Other firearm calibers are the shotgun caliber and rifle caliber. In addition the shotgun caliber entails of three gauges. The 12-gauge shotgun is the most popular caliber round and has a larger barrel diameter than the 20-gauge shotgun. Equally important is the word gauge is termed as bore in the UK therefore we can say “12 bore shotgun’.
Rifles are housed in a variety of calibers with the lowest measurement being 4.4 mm and the highest is 20 mm which entails the anti-tank rifle. With the development of series of rifles other calibers emerged and the most popular being the .22 long rifle which is beginner friendly and can be used by used due to its low recoil, others stated are .30-30 Winchester – which is a golden age centerfire smokeless cartridge introduced in the year 1895 and its associated with lever-action rifles, .30-06 springfield- it has an accurate kill shot living no animal alive due to its power range and popular bolt action hunting round and many more.
Below is a table illustrating the common calibers in inch and their metric equivalents:
|Caliber||Metric caliber in (millimeters and inches)||Typical bullet diameter in inches and millimeters|
|172||4 millimeters 0.157 inches||0.172 inches 4.37 millimeters|
|20, 204||5 millimeters 0.1969 inches||0.204 inches 5.18 millimeters|
|221||5.45 millimeters 0.2146 inches||0.221 inches 5.61 millimeters|
|22||5.6 millimeters 0.2205 inches||0.223 inches 5.66 millimeters|
|224||5.7 millimeters 0.2244 inches||0.224 inches 5.69 millimeters|
|243||6 millimeters 0.2362 inches||0.243 inches 6.17 millimeters|
|25||6.35 millimeters 0.25 inches||0.257 inches 6.35 millimeters|
|26||6.5 millimeters 0.2559 inches||0.264 inches 6.7 millimeters|
|27||6.8 millimeters 0.2677 inches||0.277 inches 7.035 millimeters|
|284||7 millimeters 0.2756 inches||0.284 inches 7.213 millimeters|
|308||7.62 millimeters 0.3 inches||0.308 inches 7.82 millimeters|
|311||7.9 millimeters 0.3110 inches||0.311 inches 7.92 millimeters|
|312||7.94 millimeters 0.3126 inches||0.312 inches 7.94 millimeters|
|323||8 millimeters 0.3149 inches||0.323 inches 8.20 millimeters|
|338||8.6 millimeters 0.3385 inches||0.338 inches 8.58 millimeters|
|355||9 millimeters 0.3543 inches||0.355 inches 9.01 millimeters|
|356||9 millimeters 0.3543 inches||0.356 inches 9.04 millimeters|
|357||9 millimeters 0.3543 inches||0.357 inches 9.07 millimeters|
|363||9 millimeters 0.3543 inches||0363 inches 9.22 millimeters|
|365||9.3 millimeters 0.3661 inches||0.365 inches 9.27 millimeters|
|375||9.5 millimeters 0.374 inches||0.375 inches 9.53 millimeters|
|40||10 millimeters 0.393 inches||0.400 inches 10.16 millimeters|
|44||10.9 millimeters 0.429 inches||0.429 inches 10.89 millimeters|
|45||11.43 millimeters 0.45 inches||0.451-0.454 inches 11.46-11.53 millimeters|
|50||12.7 millimeters 0.5 inches||0.510 inches 12.95 millimeters|
How to Choose the Right Bullet Size
Related: Gun Sizes
Bullet sizes are determined by measuring the diameter of the bore from one part to the opposite and its measurement is expressed in millimeters, hundredths of an inch, and thousandths of an inch, for example, a 223 caliber rifle has a smaller bore diameter compared to a 270 caliber rifle bore. Specific cartridges are manufactured to match every handgun or rifle.
The barrel stamp indicated on the firearm must always match the ammunition. Similar bore size measurement does not indicate interchangeability between different cartridges. It’s important to visit a qualified gunsmith if you are unable to locate the caliber stamp written on the firearm. The weight of a bullet becomes crucial when it impacts factors such as recoil, ballistics, and accuracy.
To know the right bullet weight for you first, you need to know what unit of measurement is used and it’s called a grain (1 pound is equal to 7000 grains). Once you can identify the weight of the bullet, then with any given load you can know if it falls on the lighter end of the heavier end of the spectrum. Therefore one can choose their favorite bullet size/caliber with the availability of bullet weight.
The best bullet size for you
Getting to match the right bullet with the gun of your choice has not been an easy task for the past years due to the increase in bullet sizes and cartridge dimensions.
Nonetheless, nowadays a lot of people use their firearms for the same reasons like sporting events, hunting purposes, or self-defense therefore one can get what fits their needs from the caliber list items.
More about Bullet Size explained (video)
Law enforcement agencies should be vigilant and educate the masses on gun maintenance and gun safety to prevent fatal injuries caused by bullets. The cranial gunshot wound is one of the deadliest firearm injuries since it is on the head therefore chances of survival are minimal.
Findings show that shootings from larger caliber firearms are considered more hazardous than smaller caliber firearms due to the wound size it leaves. Fortunately, with modern advancements, the bullet indent marker was created so that law enforcers can trace the bullet or cartridge from the weapon it was fired from.
In summary, it is important to practice gun safety wherever to protect yourself and those around you.
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