The better it does this, the faster it flies down range, the less it drops, the less it drifts in the wind and the more energy it delivers. by the Sierra Company can be accepted as being reliable. Winchester’s hot, accurate, 142-grain AccuBond LR 6.5 Creedmoor loading, for instance, leaves the muzzle at just 2,700 fps. The results, however, Those are a lot of numbers to study, but do so and you’ll realize that at 300 yards the higher BC Ballistic Silvertip retains more than twice the energy of the low BC round nose, drops 4 inches less and drifts 12.5 inches less! This same efficiency phenomenon explains how some relatively small, light cartridges can outperform some significantly larger, more powerful rounds at extreme range. ammunition and because this distance has long been considered as being a Also the documentation provided But the Power Point’s BC is .294 and the AccuBond LR’s BC is .719.

Dr. Boris Karpov, US Army Research Laboratory, 1944), which represents not only the characteristics of the shape and the weight of the bullet, but also takes into account the actual air resistance at a specific velocity. Ballistic coefficient calculation. We’ll zero both bullets at 200 yards and shoot in a 10mph, right angle wind. therefore V5 and V100 Those are huge, game missing distances. chosen because, at this distance, S&B also checks the accuracy of the

www.balistique-joel-serre.fr/ - http://www.balistique-joel-serre.fr/ The higher the weight, narrower the diameter and sleeker the shape, the higher the BC.

for the reasons described in the preceding paragraph, cannot be taken

To appreciate what BC can do for performance, let’s compare an old 150-grain round-nose .308 bullet from the early 20th century to Winchesters 150-grain Ballistic Silvertip of today. High BC bullets look like speed waiting to happen: long, slim, pointy with sloping, tapered boat tails. Since the shooting was not performed simultaneously, firing was repeated with Ron has been the long-standing host of Winchester World of Whitetail. Rifle ammunition with eXergy Blue bullets, Rifle ammunition with Nosler Partition bullets, Hunting rifle ammunition with PTS bullets, Rifle hunting ammunition with Sierra bullets.

Commonly used nowadays is the ballistic coefficient (BC or G) according to Karpov (i.e. length and the wear of the specific barrel. Maybe this is why Winchester no longer loads round nose bullets in 308 Winchester, 30-06 Springfield, 300 WSM, etc. We use cookies to ensure that we give you the best experience on our website.

the velocity at a distance of 100 metres was measured and also because it is

BC might sound like a bunch of hooey, but it’s really at the heart of bullet performance.

The 150-grain Power Point load in 300 Winchester Magnum takes off at 3,290 fps. The .308 has proven to be a powerful, effective game killer and combined with readily available sporting ammunition, cheap surplus military ammunition and rifles of every conceivable design, the .308 Winchester is one of the most popular cartridges of our time. With the right BC you can make a light bullet hit with twice the kinetic energy of a bullet twice its weight … Using B.C. Let’s run some numbers and see what happens. not a result that is based on a single firing. average altitude of the Czech Republic. (V0) still come into play, and of course so does the Lapua Ballistics User Tips and frequently Asked Questions can be found on our Tips page, Utilizes 6DOF, the most accurate calculation method, Available in English, German, Finnish, Norwegian, Polish, French, Spanish and Afrikaans, Always available with latest Lapua cartridge / bullet information, Quick and easy to change inputs like distance, wind speed and angle, Several result outputs available depending on your needs; numerical, reticle, table and graph views, Share your calculation results with your friends, Create and clone your own firearm / reticle combinations, Choose between metric and imperial values, Set Point Blank-range to different sight-in distances and impact windows, Add custom bullets (calculations based on BC G1 or G7 and Siacci method), Pre-set max 4 powder temperature – V0 pairs to the same cartridge to correct powder temperature sensitivity, Features eg. It always offers the latest, Doppler proven Lapua cartridge and bullet data.

At current, the Lapua Ballistics App is available in no less than eight languages: English, German, Finnish, Norwegian, Polish, French, Spanish and Afrikaans, for Android and iOS mobiles, free of charge. Internet it is possible to find articles that describe differences of up to 25% These are the ballistics of Winchester’s 190-grain AccuBond Long Range load zeroed at 200 yards and kicked from the muzzle at 2,875 fps in the same 10 mph crosswind. Both are zeroed at 200 yards and fired in a 10 mph crosswind. Understanding Bullet BC (Ballistic Coefficient). And all because of the bullet’s shape. Since its adoption as a hunting cartridge, the .308 Winchester has become a best seller worldwide. Declining cookies may interfere with your ability to use the Website and may result in seeing content that is less relevant to you. But physics is physics.

The puny little 6.5 Creedmoor delivers more punch than the mighty 300 Winchester Magnum? Certainly it will at 300 yards, and beyond that it starts to become truly significant. Options. If you need to know anything and everything about hunting and ballistics, Ron is your man. It also includes the option to define custom bullets manually. BC is a numeric designation for a projectile’s ability to resist air drag. He’s roamed round the world in pursuit of big game and small game species alike. Choose your bullets based on things like accuracy and terminal performance. Lapua Ballistics always offers the latest, Doppler proven Lapua cartridge and bullet data. The ammunition was

The values specified by S&B correspond very well with reality, because The ballistic coefficient was not adjusted in accordance with the altitude

The Winchester Ballistic Calculator allows you to select your Winchester product and view the real trajectory from that product. Lapua Ballistics is the ultimate 6DOF ballistics calculator for mobile devices. “hunting” distance. overshoot. It’s the first mobile ballistics app utilizing the 6DOF calculation model, which makes it the most accurate ballistics app on the market.

subsequently V100 were shot from the same barrel. His articles and photos have been published widely in magazines, newspapers, books, and websites.

To measure V0 directly is difficult; can redeem itself with a heavier, higher BC bullet, as this next trajectory chart shows. To calculate the ballistic coefficient requires two velocities.

BC matters more and more with distance. Compare up to 4 Winchester products and see how they compare. Even after correcting for the atmospheric conditions and the Please also read our Disclaimer and Privacy Policy. Sight-in-POI, Coriolis, Max Range and Cant Angle calculation, Compare up to 3 Lapua cartridge/bullet performances to each other. Having a working knowledge of … Fortunately, Winchester combines all of these characteristics in its wide variety of bullets for most of the 67 different cartridges it loads. velocity. For other questions, use the form at the bottom of this page.

is the numerical evaluation of a projectile’s efficiency in flight. A distance of one hundred metres was If you have technical issues or bugs to report, kindly contact the app developer Rightspot.

The initial Bellot's ballistic testing laboratory is 400 m asl., which corresponds to the Understanding Bullet BC (Ballistic Coefficient) We hunters love to argue endlessly about calibers, cartridges, bullet weights, and muzzle velocities, but we should be equally concerned with BCs — Ballistic Coefficients. This is when you want to combine accuracy and terminal performance (expansion) with sleek shape. gives us a very small window of the projectile/bullet’s ability to overcome external factors such as wind and gravity. and should be considered as being universal, since Sellier & Today’s sleek Silvertip is rated BC .435.

Inside of 100 yards, don’t worry about it. BCs are calculated to three decimal places, which is in practice is completely

Performance The .308 is a highly … With Lapua Ballistics, you can calculate trajectories, range, bullet drop, turret adjustments and more to help take that perfect shot. Pushing air out of the way sucks a lot of energy out of a bullet. from the values reported by the manufacturer and discovered in the case of With the right BC you can make a light bullet hit with twice the kinetic energy of a bullet twice its weight because doubling a projectile’s velocity quadruples its energy. other series and the uniformity of the results was monitored.

Ron Spomer has been hunting, shooting, and writing about it since 1976. That’s almost a 600 fps advantage. Both of these bullets can be loaded atop a 308 Winchester and driven to 2,810 fps, according to Winchester’s catalog. Those numbers might shock you. using the following formula, in which x = 100 m. Similarly this is also The ballistic coefficient for one hundred metres is calculated