Blog & Articles

A brief history of Ballistic Coefficients

Ballistic Coefficient:

The ballistic coefficient (BC) of a bullet is a measure of a bullet’s ability to overcome air resistance during its flight. This flight is inversely proportional to the negative acceleration: a high number indicates a more streamlined bullet.

Mathematically, the BC calculation is the sectional density of the bullet divided by the form factor. This definition emerges from the physics of ballistics and is used in mathematical analysis of bullet trajectories.

The History:

The science of Ballistics goes back many years because from the invention of firearms man needed to know how the projectile would travel for it to be effective. Continue reading A brief history of Ballistic Coefficients

Twist Rates and Bullet Stability

Why are barrels rifled?

Why not use a smooth bore? It would certainly simplify things for the barrel manufacturer and lower costs for everyone.

The answer is that bullets will not fly straight unless you spin them. The rifling grips the bullet by the jacket and forces it to spin at a high rate as it is pushed down the bore by propellant gasses. Rifling ensures bullets will be stable.

The spin applied to a bullet by the rifling is called the twist rate. This is expressed as one complete turn (revolution) in a given number of inches or millimetres. The longer a projectile is the faster it must be spun to stabilize or remain point first in flight. Continue reading Twist Rates and Bullet Stability

Mono-metal Vs Jacketed

The differences between mono-metal and jacketed bullets are multilevel, with many variables and differences in applications. This is not just true at the customer level, but equally as important on a production level. At a glance:

Advantages of copper Bullets:

Even when petals break off they have excellent weight retention, between 70% and 90%.

They very rarely suffer from concentricity problems. Continue reading Mono-metal Vs Jacketed

Going Green

The concept of going green is not a new one.

We see it in building designs, farming, the automotive industry and even fishing. The environment is a precious resource, and none are more aware of that than the shooters like you and me out on the range, walking our hunting dogs or in the bush stalking antelope. We know the dangers of deforestation and dumping, try to minimize our impact by leaving our campsites clean and not dumping our used oil in the bushes when we change the filter.

Yet every year millions of lead hunting bullets are created world-wide, many of which land up in the game meat we eat—poisoning not only the environment but our own families.

Continue reading Going Green


Welcome to the Viper Bullets blog.

While talking to people in my shooting circles I have noted that most shooters don’t fully understand monolithic bullets and their pros and cons. It’s not surprising as it is a complex subject. So over the next few months we will be publishing a set of articles concerning monolithic bullets. I would like to deal with a number of aspects from the basics to more advanced theory—hopefully building up a resource for shooters of all walks to draw on. Continue reading Welcome