308 Ballistics Chart & Coefficient. google_ad_client = "ca-pub-8417283882784443"; 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. This is done so you have an accurate number that represents the bullets performance over long range. When comparing BCs of different bullets, it is important to use an apples-to-apples approach. G1 (flat base with two caliber (blunt) nose ogive), G5 (short 7.5 boat-tail, 6.19 calibers long tangent ogive), G6 (flat base, six calibers long secant ogive), G7 (long 7.5 boat-tail, ten calibers tangent ogive), G8 (flat base, ten calibers long secant ogive). A bullet's efficiency is measured by its ballistic coefficient (BC). 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. Simply put, sectional density is the ratio of weight to the diameter of the bullet. Round Nose bullets have the lowest BC. Very helpful! gear. This is an extreme example but illustrates that the different shape of a projectile will affect your ballistic coefficient. These variables, which well discuss in the next column, can change each time and location you shoot. They typically expand well through a wide velocity window yet hold together well for deep penetration on animals that measure 20 inches or more through the vitals- on a perfect broadside shot- and offer capable penetration if a quartering-to shoulder shot or a quartering-away raking shot is all that's offered. The G7 is more representative of the current state of rifle rounds. Imagine launching a quarter at a target, but we somehow get it to fly face first, so the top flat side with Georges head is leading the way. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Let me hear from you in the comments below! All measures of ballistic performance including drop and wind deflection . The G1 drag model is based off of a stereotypical spitzer bullet (pointed nose) with a flat base. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Quantserve sets the mc cookie to anonymously track user behaviour on the website. It will also work with other .257 caliber rifles, as long as they are fitted to barrels with a very fast twist. Weve got a dedicated section for the AR-15 here. Weight. To throw a little light on the subject (and out of my own curiosity), I recently shot a selection of eight of my favorite bullets into 10-percent gelatin at 50 and 400 yards. By clicking Accept All, you consent to the use of ALL the cookies. This is because of drag caused by wind resistance. . So, someone said, Hey! Even their ammo is great. One is a 150-grain Sierra Pro-Hunter. The High-BC .22 LR Bullet: Are We There Yet? This means you have the option to read your magazine on most popular phones and tablets. It adjusts the trajectory prediction for each bullet type. To illustrate the practical difference between these three styles of bullets, let's use Hornady's trajectory figures for the 100 grain 6mm bullets above. Mach 2.0 (2,233 fps @ ICAO Standard Atmosphere) and Mach 1.75 (1,954 fps @ ICAO Standard Atmosphere) BC values are also available. The goal was to be able to predict how far projectiles would travel, the arc of flight, and at what velocity they would impact targets. I suspect this would lower the BC..but any idea how much? While factory .22 LR round-nose bullets have BCs in the 0.072 to 0.149 range for bullets of 26 to 40 grains started at typical low .22 LR velocities, the Cutting Edge bullets come in at only about 0.111 (G1 BC), according to the company's president, Dan Schmitko. In actuality, the smaller caliber, lighter-weight bullet actually has a BC that's 28% higher than the larger caliber, heavier bullet. 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. I would imagine the best BC would be the Berger 168 VLD. As Sectional Density is a key input to Ballistic Coefficient, well look at that first. The boat tail bullet had .3" inch less rise at 200 yards, and 1.9" less fall out at 500 yards. 8. Spitzer rounds with a flat base have a much higher BC than Round nose bullets. Under the tutelage of Walt Bergerone of the best bench-rest shooters of all timeBerger Bullets established a reputation for creating some of the most accurate bullets ever produced. Remember that in our example, the Matchking had a coefficient of 0.417 while the Pro-Hunter had a BC of 0.185. This aerodynamic tip enhances the bullets ability to resist gravity and wind, and it ultimately reduces flight times. Sectional Density is a measurement that reflects the ratio of somethings mass to its cross-sectional area. This cookie, set by Cloudflare, is used to support Cloudflare Bot Management. Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. 250 gr. With an Accu-Fit stock and left hand adjustable bolt, this rifle is a perfect choice for anyone! They are the ones to choose for long range shooting where a flatter trajectory is important. BC is mostly used by rifle shooters. Think about it this way: An arrow is more aerodynamically efficient than a tennis ball. A bullet with a high ballistic coefficient is slippery and less subject to drag (slowing down) as it continues on its merry way. This makes the bullet less sensitive to seating depth and makes load development much easier. For 2020, Federal will be offering a new line of ammunition called Terminal Ascent, which uses a bonded bullet with a solid-copper rear shank to penetrate deep on close targets, and a polymer tip to initiate expansion at velocities 200 fps slower than comparable designs. Get the 76th edition of the World's Greatest Gun Book. Provided by Google Tag Manager to experiment advertisement efficiency of websites using their services. All of this algebra and calculus mumbo jumbo is intended to solve one thing: to predict the behavior of a bullet as it flies through the air. One more thing. He currently teaches concealed carry courses and enjoys spending time in Floridas Nature Coast. Enjoyed your discussion on BCs. The extremely poor SD of the .224" bullet lowers its BC, even though its shape is similar to the others. ; ), BC = Section Density divided by Form Factor. Understanding basics means more game on the table, and more steel pings. It was nice to see it all brought together in one. Get the Most Out of the .30-06 - Shooting Times Access features of the Reloading Handbook on your mobile device with the Reloading App. Now, lets launch them both at 2,750 feet per second from a Sierra Bullet Blaster 7000 rifle and see what happens. And when practicing @ a firing range, you want to use bullets designed for what you want to do; the bullet that gives you the best score shooting @ targets & the one that is best for hunting any particular animal will probably be quite different. Scott Rupp gets a chance to talk to Aaron Oelger about a few new products from Hodgdon and why reloading store shelves are empty. To show viewers how to succeed at long range, J. Guthrie gears up for a challenging shot while chasing Colorado pronghorn at long range with DPMS' Panther 6.5 Creedmoor. His books are available in print and eBook format on Amazon. Ballistic Coefficient (BC) values can, and usually do change in value with changes in velocity. This cookie is set by GDPR Cookie Consent plugin. RELATED: 10 Best Long-Range Hunting Cartridges. Weight retention (175.9 grains) was a remarkable 98 percent, and the expanded bullet measured 0.69 inch, actually larger than at 50 yards. Take a look at the bullets themselves and what we learned. YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. Get Our Top Shooting Drills and Zeroing Targets ($47 value - but FREE for a limited time). Articles may contain affiliate links which enable us to share in the revenue of any purchases made. For example, consider a smaller caliber like a 6.5mm (.264 Caliber) 144 grain Long Range Hybrid Target thats relatively heavy for its caliber, compared to a larger caliber bullet like a .308 Caliber 175 grain OTM which is absolutely heavier, but is relatively light for its caliber. Available Calibers: 6mm, 6.5mm, 7mm, .308, and .338. To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. This Sierra Pro-Hunter is also a .308, 150-grain . The higher the BC, the less drag on the bullet. Unfortunately its not as simple as just comparing the single numbers. As for distances, I'd already decided to choose 50 yards as the close mark, and after some discussion the editor settled on a max of 400 yards- a long shot, for sure, but a range at which most accomplished riflemen can make clean, ethical hits from field positions. Instead search for the bullet on the top left using the search box or browse by rifle, or pistol using the links from the main menu. Commissions are earned for links to Brownell's, Amazon, MidwayUSA, GoHunt, OpticsPlanet, Sportsman's Warehouse, and other retailers. How to choose one of the myriad premium bullets available today? shoots flat, hits hard, and fits in standard length actions. The 10 Best Rifle Bullets for Long-Range Shooting Ballistics Basics: Bullet Efficiency And Ballistic Coefficients, Gun Review: Nighthawk Border Special 1911, Classic Guns: The Ithaca Model 37 Shotgun. Lets assume youre shooting a .308 rifle and you have two types of bullets of identical weight. As Hornady moves the industry to drag coefficient based trajectory calculations for these types of projectiles, the Ballistic Coefficient is becoming somewhat irrelevant. Another thing to keep in mind when comparing BCs is related to caliber. These bullets will withstand high-velocity impact at close range and still deliver expansion at distances to and beyond 800 yards. 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. Mag. His latest projects include an online course to help people get an FFL (. The nail flying point forward has a very high sectional density because its long and skinny. Heres why. YouTube - Store data on what videos from YouTube the user has seen - 2. Ryan Cleckner is a a former special operations sniper and author of the Long Range Shooting Handbook. Conversely, it's not that difficult to produce a bullet that will hold together at close-range, high-impact velocities, but the heavy jackets, harder lead-alloy cores and bonding processes used to create such bullets can inhibit expansion when distances stretch and velocities drop. Great info! .243" 100 grain Spire Point BT (BC .400): -1.5" @ muzzle, +3.6" @ 100 yards, +4.4" @ 200 yards, 0 @ 300 yards, -10.4" @ 400 yards, -28.6" @ 500 yards. Then youll repeat the process. Vimeo installs this cookie to collect tracking information by setting a unique ID to embed videos to the website. Available Calibers: 6mm, 6.5mm, .277, 7mm, and .308. It has a tangent ogive, tapered jacket, sleek boattail, and a bonded core that hides behind a grey polymer tip. Registration on or use of this site constitutes acceptance of our Terms of Service. Ballistic Coefficients - Sierra Bullets Richard Mann I may earn a small part of the sale from links to any products or services on this site. All bullets start to slow down the moment they leave the barrel. Hornady originally published 800 yard* average Ballistic Coefficient (BC) values for ELD-X and ELD Match bullets. Speed and Energy are figured out using an average of all the known cartridges. Instead, the BC is best used as a comparative number between different bullets. I dont have much experience beyond 600 yards. During this time of overwhelming demand, our team is doing everything possible to produce more bullets and ammo than ever before. As a fudge factor, the ballistic coefficient is usually a number between one and zero, but not always. They typically expand violently, causing tremendous wound cavities and resulting in rapid kills. For example, if you like to shoot old cap and ball revolvers you are familiar with standard round balls as projectiles. As examples of very streamlined bullets, note the BC of these Speer match type bullets. Due to the sensitivity of BCs to velocity, it can highly skew the comparison. Thats because the BC varies with speed. Learn more . This is an extreme example but illustrates that the different shape of a projectile will affect your ballistic coefficient. Therefore, these variables are mostly a concern when youre trying to determine the change in your bullets speed from the last time(s) you went shooting. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously. Niccolo Tartaglia was the first to notice that a shot trajectory was continuously curved. bullets). BC is a number that can be used as an input for ballistic solvers to predict trajectories. One of the first terms I ran across while discovering my fascination with long-range shooting was ballistic coefficient. You dont have to worry about that as your ballistic software will deal with it. The Remington Model Seven is ready, willing and able to handle just about any task. Form Factors: A Useful Analysis Tool | Berger Bullets Blog The .30-06 Springfield was better than the .30-30 because it spit the same .308-inch bullets 400 to 500 fps (feet per second) faster. Heres what you need to know about drag models. When entering this stuff into your Kestrel or ballistic smartphone app, be sure to use the right BC number with its corresponding drag model. is the numerical evaluation of a projectile's efficiency in flight. Weve got a big wide object pummeling its way through the air towards the target. This includes the rounds trajectory, velocity, and wind drift. Bullets for hunting, however, might benefit from not having an aerodynamic shape. Mag. Both increase the BC of a bullet. The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. It's like the humpty-dumpty or weeble of the .308 bullet world. . For example, a lead round-nosed bullet can sure pack a punch! ShootersCalculator.com | Ballistic Trajectory Calculator These are all pointed hollow point, boat tail bullets. The more efficient a bullet is, the better it will maintain its speed. As opposed to same in a flat base bullet. Finally, if your goal is to indicate performance potential of a bullet at long range, you . Adding more tin, the weight can go down to 545gr from the same mold. 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. .243" 100 grain Round Nose (BC .216): -1.5" @ muzzle, +4.8" @ 100 yards, +6" @ 200 yards, 0 at 300 yards, -15.9" @ 400 yards, -46" @ 500 yards. Some hunters prefer a solid copper or solid gilding metal bullet. It also demands purpose-built bullets. For example, some manufacturers measure BCs over long range while others only provide BCs tested over short range. Slow-burning, temperature-stable propellants like H4831SC and . This anonymous data helps us to better understand users' needs and customize the website accordingly. Succinct explanations for someone just getting started. Along with offering many other premium bullets as factory-loaded ammuniton, Federal makes its own long-range bullet, the Edge TLR, which offers ideal close and long-distance terminal performance. (, We noticed that you have previously logged in with your, Check what do you get by creating an account, Bookmark and compare your favorite firearms, Ballistic Coefficient: Everything You Ever Wanted to Know, One of the first terms I ran across while discovering my fascination with long-range shooting was.
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