Oh, and because our two example bullets above have the same weight and diameter, hence the same frontal surface area, the sectional density numbers are the same: .226. As Hornady moves the industry to drag coefficient based trajectory calculations for these types of projectiles, the Ballistic Coefficient is becoming somewhat irrelevant. To do this, bullets should be compared at a given Mach number (e.g. Its that simple. These differences are real, but unlikely to make or break a shot at a big game animal. Not so long ago a Barrett or Cheytac was needed at a high price for shots out to a mile+. Get the 76th edition of the World's Greatest Gun Book. Our first offering in the Blackjack Bullets lineup is the 25 Caliber 131 grain ACE Match bullet with an outstanding 0.330 G7 Ballistic Coefficient (1000 yd Average BC) tested on the Oehler 88 System. This website uses cookies and third party services. At the peak of the market-hunting era, waterfowlers We interviewed fourth-generation master flintlock rifle maker John From forcing cones to action bars, here's a Sign up for the Field & Stream newsletter and get the latest intelligence straight to your inbox. Due to the sensitivity of BCs to velocity, it can highly skew the comparison. Almost any bullet can be made to expand at long range, but the thin jackets and soft cores that promote such expansion don't support bullet integrity when impact distances are close and velocities extremely high. These bullets also feed very well from the detachable magazines being used by most long-range semi-auto and bolt-action rifles. These hypothetical examples show us two things: 1) A more aerodynamically efficient bullet wont slow down as much on its way to the target, and 2) efficiency doesnt matter as much when the air density is low (thin air). Put another way, its the ratio of the bullets sectional density to its coefficient of form. Mag., and .300 WSM.and as a component for handloaders. He is interested in helping folks protect themselves with firearms and shoot better at the range. ; ), BC = Section Density divided by Form Factor. Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. Twist Rate's Impact on Ballistics. When entering this stuff into your Kestrel or ballistic smartphone app, be sure to use the right BC number with its corresponding drag model. Please let me know how it can be improved upon. Technically, its the ratio of the weight to the surface area, but its easier to think in terms of diameter as thats how bullets are measured. In short, a high ballistic coefficient is indicative of a rounds ability to resist drag. Newly Published base of comparison. I dont have much experience beyond 600 yards. Berger Bullets | What is a bullet BC? Enjoyed your discussion on BCs. When this happens dont leave! 50 bmg ballistic coefficient - 3wge.com Commissions are earned for links to Brownell's, Amazon, MidwayUSA, GoHunt, OpticsPlanet, Sportsman's Warehouse, and other retailers. But it can also be rewarding, and highly educational. Fifty years ago, when hunters argued over which cartridge was best, they focused on muzzle velocity. Select what level shooter you are!
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