Ballistic coefficient is typically measured with a 3 digit expression. Almost all rounds have a ballistic coefficient of less than 1.0, but large rounds like the 50 BMG can exceed this normal BC. The higher the number, the less drag the projectile will experience.
G1 and G7 are two different methods of calculating Ballistics. G1 is the old system for measuring BC and is suitable for flat based bullets, but many bullet manufacturers use this coefficient for boat tail bullets as well, so we include the G1 information so that you can directly compare our bullets to their bullets.
Small difference between all 3 bullets. Only varies by 0.35 inches between highest and lowest bullet path values. Now, the Nosler 55gr bullet has a BC (ballistic coefficient) of 0.267, while the Sierra has a BC of 0.237 and the Hornady a BC of 0.255.
A G1 BC of 0.666 * is the minimum at which I consider a bullet to be "Long Range". Likewise, bullets under 0.333 BC are short range. Those in between are "mid range". Any over 0.999 are extreme range.
The 6.5 Creedmoor has the best Ballistic Coefficient, and perfect for long range shooters. The Hornady 6.5 Creedmoor 140 grain A-MAX boasts a Ballistic Coefficient of . 585 and muzzle velocity of 2710 FPS.
223 FMJ bullet since the higher weight also reduces muzzle velocity to around 2,700 FPS. If you zero that in at 50 yards, it will hit 4.2 inches low at 200 yards. At 500 yards you hit 72.2 inches (6 feet) low and at 1,000 yards it is 549.3 inches low or more than 45 feet.
Ballistic Coefficients are measures of objects' abilities to overcome air resistance mid-flight. Typically, the higher the number, the lower the drag of the projectile (low negative acceleration), and the better the bullet will cut through the air.
ballistic efficiency. [b?′lis·tik i′fish·?n·sē] (mechanics) The ability of a projectile to overcome the resistance of the air; depends chiefly on the weight, diameter, and shape of the projectile. The external efficiency of a rocket or other jet engine of a missile.
The Ballistic Coefficient calculator computes the Ballistic Coefficient (BC = M/(Cd*A)), a factor representing the effect of air resistance on a ballistic projectile. INSTRUCTIONS: Choose units and enter the following: M- the mass of the projectile.
How is a bullet drop calculated? - Quora. Standard Newtonian Physics. A bullet in flight falls at the rate descibed by the equation S = VoT + 1/2 A ( T x T ), or “ S equals V subzero T plus one-half A times T squared”.
The Ballistic Tip is Nosler's trademark name for their line of hunting ammunition – which is a hollow point with the front cavity filled with a hard plastic polymer, creating an extremely aerodynamic bullet shape.
G1 and G7 refer both refer to aerodynamic drag models based on particular “standard projectile” shapes. The G1 shape looks like a flat-based bullet. The G7 shape is quite different, and better approximates the geometry of a modern long-range bullet.
The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of . 409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards.
The ballistic coefficient of each bullet changes with velocity of the bullet as it flies. The ballistic coefficient of a bullet is not constant with bullet velocity. When the bullet velocity is greater than 1600 fps, the G1 drag function is a reasonable model from which to compute the aerodynamic drag on a bullet.
The stats are generated using a . 22-250 Remington, Remington AccuTip, 50gr with a ballistic coefficient of 0.242 being fired at a velocity of 3799 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards.
228, zero at 100 yards, it will drop roughly 10 inches at 300 yards, and 24 inches at 400 yards.
Tactical-Life
- JON WEILER — Preferred Caliber For 500 To 1,000 Yards And Beyond: 6.5 Creedmoor.
- JOHN BUOL — Preferred Caliber For 500 To 1,000 Yards And Beyond: 5.56mm NATO.
- BUCK DOYLE — Preferred Caliber For 500 To 1,000 Yards And Beyond: .260 Remington (130-grain Berger AR Hybrid OTM Tactical)
The old 257 Weatherby and 338 Lapua still work for long-range shooting and of course, nothing beats a 50 BMG for ultra-long-range shooting. The military uses a 308 Winchester for sniping to 600 yards. From 600 to 1000 yards they use a 300 Winchester.
What are the best long-range cartridges:
- . 300 Winchester Magnum.
- . 338 Lapua Magnum.
- . 300 Weatherby Magnum.
- 6.5 Creedmoor.
- 6.5-284 Norma.
- 26 Nosler.
- 7mm Remington Magnum.
- 6mm Norma BR.
Table 1: Flattest Shooting Loads By Caliber (ranked by least hold-over at 300 yards)
| Zero = 250 Yards; Cross Wind Speed = 10 MPH |
|---|
| Caliber | Flattest Shooting Load | BC |
|---|
| 7mm R Mag | Hor 139 gr InBd HvMag | .480 |
| 270 WSM (1) | Fed 130 gr Nosler BT | .428 |
| 300 Win Mag | Hor 150 gr InBd | .410 |
30-06 would probably be the best choices for your all-around rifle. They are slightly superior to the . 270 or the . 308 for the really big stuff.
So, to answer that question about the most accurate rifles made—here they are.
- Mauser M18.
- Proof Switch.
- Savage M10 Stealth.
- Christensen Arms MPR.
- Bergara B-14 HMR.
- BadRock Precision South Fork.
- Daniel Defense Delta 5.
- Anschutz 1517 American Varminter. Anschutz 1517 American Varminter • $1,650Anschutz.
22 caliber rimfire “Colibrí” rounds made by Aguila Ammunition of Cuernavaca, Morelos, Mexico really do fire the slowest bullets of any commercially manufactured ammunition. Aguila's advertised maximum muzzle velocity for the ammunition is a mere 420 feet per second (128 meters per second).
10 Best Long-Range Hunting Cartridges
- 6.5 Creedmoor. Love it or hate it, the 6.5 Creedmoor offers the perfect balance of long-range reach and light recoil.
- 6.5 PRC. Hornady's 6.5 PRC is basically a better version of the old .264 Win Mag.
- 26 Nosler. The 26 Nosler is a 6.5 Creedmoor on steroids.
- . 280 Ackley Improved.
- 7mm Remington Magnum.
- 28 Nosler.
- 300 PRC.
- .
- 338 Lapua Long Range Cartridges. 338 Lapua Ammunition.
- 300 Winchester Magnum or just Win-Mag. 300 Winchester Magnum.
- Hornady's 6.5 Creedmoor. Hornady 6.5 Creedmoor.
Ballistic Coefficient (BC) is a measure of the bullet's ability to overcome air resistance in flight when compared to an "ideal" ballistic model. The higher the number, the less air resistance it has. Sectional Density (SD) is a comparison of a bullets mass to it's cross sectional area.
The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half the velocity V squared times the reference area A. The drag coefficient then expresses the ratio of the drag force to the force produced by the dynamic pressure times the area.
