The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. The cookie is used to store the user consent for the cookies in the category "Other. The U.S. Army calls the round "next generation," and based on .277 Fury's capabilities, that is not an exaggeration. It's when game such as elk, moose, caribou, mountain goats and the bigger bears are on the menu that bullet integrity becomes critical. Fluid properties (air) vary with velocity and environment. You'll now receive newsletters of our best articles on techniques, 1 Single-Shot Rifle: Tips to Improve Its Accuracy, Wilson Combat Paul Howe Tactical 6.5 Creedmoor: Full Review of the Versatility Champ, .45-70 vs .450 Bushmaster Cartridge Clash, 10 Great .22 Mag Bolt-Action Rifles Right Now, Sweet Scents of Gun Solvents and Oils: 12 Perfumes for Firearms, .375 H&H Mag. Some big, heavy, and efficient bullets like the .50 BMG can have a ballistic coefficient greater than one, but that topic is for another day. AccuBond Long Range bullets will hold up to extreme, high-velocity impacts at close range, and still deliver expansion and penetration at crazy long distances. Ballistic Coefficient is essentially a measure of air drag. Subscribe to Pew Pew Tactical's sales and deals email. 338cal. But these Speer numbers are as typical as any, and being from the same source they are useful for purposes of comparison. The Matchking has a coefficient of 0.417. Save my name and email to use for future comments. With modern ammunition, we are seeing higher ballistic coefficients such as the ridiculously high BC of the shiny new .224 Valkyrie Matt was raving about. However, the science and scientists that got us to this point goes back all the way to the 16th century. A variation of the _gat cookie set by Google Analytics and Google Tag Manager to allow website owners to track visitor behaviour and measure site performance. Click below for a FREE LESSON! Find a Retailer. As an extreme example, lets use water because it is easy to picture how much denser it is than air. Long range shooters have to practice, and they must have consistent ammo to practice. These bullets also feed very well from the detachable magazines being used by most long-range semi-auto and bolt-action rifles. It doesnt pass through the air, or the animal, easily. The other is a 150-grain Sierra Matchking. So, in this case, the quarter has a very low sectional density because its mass is divided by a large number that represents its surface area. Correct? His latest projects include an online course to help people get an FFL (. These are all pointed hollow point, boat tail bullets. Thats because the BC varies with speed. Simply put, sectional density is the ratio of weight to the diameter of the bullet. Their new A-Tip bullet has a precision-machined, aero-ballistically-advanced aluminum tip, and the ogive (the curve of a bullets front section) and boattail are optimized for each caliber. I dont see how a BC can be constant for varible velocities over a given trajectory. Variation in BC with Velocity (G1, G7, etc), Manufacturing Effects on: BC, Accuracy, and Precision. There are a few things you need to understand in order to make a valid comparison. This cookie is set by GDPR Cookie Consent plugin. Sectional density is easy to calculate because it simply depends on the bullets caliber and weight. Available Calibers: 6mm, 6.5mm, and .308. Ballistic Coefficient is a bit of a new word when we look at the history of physics. Simply, the faster one starts out, the more remaining velocity it will have at the target. Its really very simple. Commissions are earned for links to Brownell's, Amazon, MidwayUSA, GoHunt, OpticsPlanet, Sportsman's Warehouse, and other retailers. My takeaway is this data is really of more interest to long range (over 300 yards?) Don't be confused the next time you hear "ballistic coefficient" tossed around by long-range shooters. gear. Its currently available in loaded ammunition and as a component for handloaders in .277, .284, and .308 calibers. When it comes to hunting or defensive use, you need the bullet to be in a certain velocity range to ensure the expansion of the projectile when it hits a target. This cookie is set by GDPR Cookie Consent plugin. guns & With an Accu-Fit stock and left hand adjustable bolt, this rifle is a perfect choice for anyone! If your app or device asks for a G1 number, be sure to use 0.646. Its great for accurate target shooting. Now, lets launch them both at 2,750 feet per second from a Sierra Bullet Blaster 7000 rifle and see what happens. Lets assume youre shooting a .308 rifle and you have two types of bullets of identical weight. The cookies is used to store the user consent for the cookies in the category "Necessary". The BC of a bullet is a ratio calculated by a mathematical model based off of its density and its particular shape. Slow-burning, temperature-stable propellants like H4831SC and . Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. This also applies to the shooter's skills. They need to be able to factor in how far the wind will move their round, bullet drop, and velocity at different ranges and it all ties back to the BC of their particular load. Available Calibers: 6.5mm, .277, 7mm, .308, and .338. Some manufacturers offer BC values at different velocity ranges. Rest assured, there will be performance differences between every two bullet designs of the same weight and different shape, just not as dramatic. YouTube - Store data on what videos from YouTube the user has seen. Does the actual BC matter? The downside is, of course, inconsistent BC as velocity changes. Let me hear from you in the comments below! The boat tail bullet had .3" inch less rise at 200 yards, and 1.9" less fall out at 500 yards. It delivers smaller BCs but is consistent throughout the velocity of the round, giving you a much more accurate representation of BC. Available Calibers: 6.5mm, 7mm, .308, and .338. Notify me of follow-up comments by email. From front to back along the flight path, the quarter is only 0.069 inches long when its flying face first because thats the thickness of a quarter. And they come in two varieties: Those designed for hunting, and those designed for target shooting. Just an old curious guy. He currently teaches concealed carry courses and enjoys spending time in Floridas Nature Coast. For big-game hunters, the Nosler AccuBond might offer the best balance of terminal performanceexpansion and penetrationthat can be found. That doesn't seem to be an overstatement, based on the Ballistic Coefficients (BC) WTC has published on this new line of bullets. In addition to the change listed above, a select few ELD-X and ELD Match bullets initially had BC values that were determined from prototype bullets. (Examples being rounds like the 30-30.). A high BC bullet can maintain velocity better than a low BC bullet under the same conditions. Most bullets exhibit a lowering BC as velocity slows. Weight retention (175.9 grains) was a remarkable 98 percent, and the expanded bullet measured 0.69 inch, actually larger than at 50 yards. Then, for other bullet types, we can create a fudge factor that adjusts the standard bullet trajectory model. Thats basically what the ballistic coefficient does. Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. In actuality, the smaller caliber, lighter-weight bullet actually has a BC that's 28% higher than the larger caliber, heavier bullet. Some hunters prefer a solid copper or solid gilding metal bullet. Maybe I cant slam dunk like Jordan but I can still enjoy the NBA right? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The only homogeneous bullet included in this test, the, A unique crossover design featuring a solid copper base and a bonded, lead-core front half, the, One of three boattail, polymer-tipped, bonded bullets included in this test, the, Known for superb accuracy and dramatic on-game performance, the, A tougher, bonded version of Remington's much-loved Core-Lokt bullet, the, Second only to the Barnes TTSX at retaining weight, the, Offering higher-than-average BCs, even for boattailed, polymer-tipped bullets, coupled with heavy-jacketed, bonded construction, the. First Focal Plane vs. Second Focal Plane Scopes Explained: Which is Best? Hmmm Looking at the chart, says bullet drop @ 100 yards: 0.0. The ACE Match is only available in one caliber, and you might be wondering why this bullet is even mentioned. It may seem as simple as comparing numbers printed on the bullet box, but there are some considerations to be aware of to make intelligent comparisons of BC. Want a bullet that has both a high BC and a consistent BC? So why the significant differences even though bullets were of the same diameter, weight, and velocity? Ballistic Coefficient (BC) is basically a measure of how streamlined a bullet is; that is, how well it cuts through the air. I like the way you played it out, easy to understand for me as a new loader. Someday maybe Ill have the time and money to play in the long range sweepstakes game one friend is regulalry hitting his targets at 800 yards, and often at 1000 yds.. me, Im happy at present if I can hit at a couple hundred yards Need more range time. Available Calibers: .224, 6mm, 6.5mm, .277, 7mm, .308, .338, and .375. Mach 2.0 (2,233 fps @ ICAO Standard Atmosphere) and Mach 1.75 (1,954 fps @ ICAO Standard Atmosphere) BC values are also available. Spitzer rounds with a boat tail have a slightly higher BC than Spitzer rounds with a flat base. The main benefit of the 55-grain bullet is its ballistic coefficient. 2-Reloading the real Pleasure of the shooting with math. .375 H&H Magnum (L), .338 Winchester Magnum (R) Public Domain. This is an Alexa Analytics cookie that is used to track user behavior. In addition to the standard G series bullet profiles, a Custom Drag Curve (CDC) can be used for a specific bullet which is the actual drag characteristics for that bullet. They like that they are lead free; that they retain 100 percent of their weight; and penetrate deeply. The B.C. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors. 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. To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. In words, the Ballistic Coefficient of a bullet is it's sectional density divided by its form factor. Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. The difference is eye opening. Until now. Join F&S+ to read exclusive stories by your favorite writers. Give a Gift Heres why. There are just so many factors to consider, many of which the manufacturer cant know, including atmospheric conditions, the drag created by your rifling, and more. Bullets with low sectional density are short and fat. 308 Ballistics Chart & Coefficient. Absolutely not. Spitzer rounds with a flat base have a much higher BC than Round nose bullets. This Sierra Pro-Hunter is also a .308, 150-grain . He is a well-known entrepreneur, having started many successful online brands, and lives in St George, Utah. towards your level. This anonymous data helps us to better understand users' needs and customize the website accordingly. BC is measurement of how efficiently a bullet is able to cut through air . This is a much bigger problem with G1 BCs than G7, but there is always some velocity dependence involved in using BCs. But unlike standard factory fare, the Cutting Edge bullets are intended to start . Stock Dia. With the jackets thick shank and the Hornady InterLock ring, you can expect 50 to 60 percent weight retention inside 400 yards and as much as 85 percent weight retention at greater distances. BC will help you determine the effective range of a projectile by taking drag into account. gives us a very small window of the projectile/bullet's ability to overcome external factors such as wind and gravity. 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. *Velocity at International Civil Aviation Organization (ICAO) Standard Atmosphere (Sea Level, 59 degrees F, 29.92 inHg, 0% Humidity). Thanks again for your very informative article. Both objects will slow down much faster in water, but the arrow wont slow down as much from its original speed in the air as will the tennis ball. The 131 ACE is an efficient bullet purposefully designed to maximize the role of the 2547 . Even their ammo is great. A quarter flying this way makes a lousy bullet, right? This was done to provide the most usable BC from a trajectory prediction standpoint. Remember High Cost does not equal High Performance. When doing pre-purchase research either on the web or at the store, the increased performance of the ELD Match and ELD-X bullets wasnt always realized in a head-to-head BC comparison. Thats where it started, and since then its gone from simple experiments all the way to engineers and scientists at places like Aberdeen Proving Ground working to improve ballistic calculations. As Sectional Density is a key input to Ballistic Coefficient, well look at that first. Luckily, there are some awesome ballistics calculators out there. The Matchking has a coefficient of 0.417. I shoot a variety of fire arms and have hunted and shot competitively for .quite a few years. The best styles for long-range shooting will have high density and aerodynamically efficient shapes. Granted, for 80 percent or more of the game (whitetails) shot by Americans, bullets don't really need to hold together and penetrate particularly deeply to provide clean, humane kills. One is a 150-grain Sierra Pro-Hunter. There are actually several different standard projectiles with different measurements and they each measure drag in a different way. Ballistic Coefficient (BC) values at Mach 2.25 (2512 fps @ ICAO Standard Atmosphere) should be used when comparing to other published BC values within the industry. For the last several years, Hornady has developed some of the best long-range bullets on the market. Access features of the Reloading Handbook on your mobile device with the Reloading App. I'm looking at building my own ballistic computer and it's been difficult to find the actual equations for not only bc but for everything else for long distance shooting.
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