What is G1 and G7 BC?

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. So, when choosing your drag model, G1 is preferrable for flat-based bullets, while G7 is ordinarily a “better fit” for longer, boat-tailed bullets.

Is my bullet G1 or G7?

G1 – also known as Ingalls, G1 projectiles are flatbase bullets with 2 caliber nose ogive and are the most common type of bullet. G7 – Bullets with the G7 BC are long 7.5 degree boat-tails, with 10 caliber tangent ogive, and are very popular with manufacturers for extremely low-drag bullets.

What is a G7 form factor?

In particular, form factor is a number that relates the drag of a bullet to the drag of a standard such as G1 or G7. G7 form factors for long range bullets are from 0.95 (low drag) down to 0.88 (very low drag) for most typical long range bullets.

Is G1 or G7 more accurate?

G1 and G7 both measure the aerodynamic qualities of a bullet but use different models to do so. It is argued that the G7 drag function is more accurate when calculating bullet drop of longer, sleeker bullets while the G1 drag function is more accurate when calculating old fashioned, flat base bullets.

Does Nosler use G1 or G7?

Use the G1 drag for Nosler bullets. The G7 is actually a much more accurate ballistics model for the modern day rifle.

Is higher or lower BC better?

A bullet with a high BC will travel farther than one with a low BC since it will keep its speed better, resist the wind better, and “shoot flatter” (see external ballistics). When hunting with a rifle, a higher BC is good for several reasons. A higher BC results in a flatter flight.

What is drag function on a bullet?

Drag functions are a measure of the drag of a “standard” bullet. This standard bullet has a C of 1.0. Bullets of the same shape typically have a drag curves (drag as a function of speed) that are the same or very similar.

Is a higher BC better?

What is the best BC bullet?

With the highest BC bullets, the 26 Nosler remains supersonic beyond 1,750 yards.

What’s the difference between a G1 and G7 bullet?

Numbered G1 through G8 (and a few others), the standard projectiles that concern shooters are the G1 and G7, because those are the two typically used in the bullet making industry to present us with BCs. Applying the older G1 standard projectile to modern rifle bullets limits BCs to be accurate only at a single velocity.

When did Berger Bullets start using G7 BCs?

In 2009, Berger Bullets introduced G7 BC’s for boat tail bullets. For those who are unfamiliar with G7 BCs, it’s simply a Ballistic Coefficient referenced to the G7 standard projectile instead of the G1 standard projectile.

Which is better for long range shooting G1 or G7?

Bryan Litz, author of Applied Ballistics for Long Range Shooting, believes the G7 standard is preferrable for long-range, low-drag bullets: “Part of the reason there is so much ‘slop’ in advertised BCs is because they’re referenced to the G1 standard which is very speed sensitive. The G7 standard is more appropriate for long range bullets.

What’s the drag factor of a G7 bullet?

The next bullet down has a longer nose (lowers drag), with a smaller diameter tip (also lowers drag), but still has a relatively short boat tail. This bullet has a form factor of 1.036, or 3.6% more drag than the G7 standard. The next bullet down has a long nose and boat tail.