What is the ballistic coefficient of a 5.56 round?
Table of Contents
What is the ballistic coefficient of a 5.56 round?
The US Army’s Ballistic Research Laboratory measured a ballistic coefficient (G7 BC) of 0.151 and form factor (G7 i) of 1.172 for the SS109/M855 ball projectile.
How many grains of powder are in a 7.62 round?
The 7.62×51mm NATO has 3.38 ml (52.0 grains) cartridge case capacity.
Will 5. 56 shoot 223?
Can you shoot 223 in a 5.56 chamber? Yes. . 223 Remington ammunition may be shot safely in a 5.56mm chamber.
What is bullet Grainage?
What is Bullet Weight / Grain? A grain is a unit of measurement of mass. 437.5 grains equals one ounce. When you see “grain” (sometimes abbreviated as “gr.” or “grs.”) preceded by a number on a box of ammo, it is referencing the weight of the bullet.
What grain 7.62 x51 does the military use?
Development
| Rifle | Cartridge | Cartridge weight |
|---|---|---|
| M14 | 7.62×51mm | 393 grains (25.5 g) |
| M16 | 5.56×45mm | 183 grains (11.9 g) |
| AK-47 | 7.62×39mm | 281 grains (18.2 g) |
What is Freebore in a rifle?
In firearms, freebore (also free-bore, free bore, or throat) is the portion of the gun barrel between the chamber and the rifled section of the barrel bore. The freebore is located just forward of the chamber neck and is cylindrical in shape.
Is 115 grain better than 124 grain?
So, the difference between a 115-grain round and a 124-grain round is the weight, sure. However, that’s just the first and biggest difference, not the only difference. When you change the weight of a round, you do more than just make it heavier.
Is a heavier grain bullet better?
Lighter weight generally means more speed and distance, but also more recoil and less power at the target. Lighter bullets are good for competition and long-range shooting. Heavier weight generally means more effectiveness, making them excellent for defense, large game, and combat.
What bullets do military snipers use?
At the present time, in both the Western world and within NATO, 7.62×51mm is currently the primary cartridge of choice for military and police sniper rifles.
Does seating a bullet deeper increase pressure?
Seating a bullet against the rifling causes pressures to be elevated noticeably higher than if the bullet were seated just a few thousandths of an inch off the rifling. A very common practice in precision reloading is to establish the COAL for a bullet that’s seated to touch the rifling.
