Learn more about our new Long Range Hybrid Target bullets. To grossly abuse math and physics, bullets with high sectional density are long and skinny. For most calibers there are several different bullets available, so you want to consider what you want the bullet to do 1st, then decide which weight & shape will work best for you. Kimber's Hunter Pro Desolve Blak takes the firm's more affordable mountain rifle to new heights. Think about it this way: An arrow is more aerodynamically efficient than a tennis ball. ELD-X stands for Extreme Low Drag eXpanding bullet. Great scores on paper targets do not equal the best shots when hunting -- unless you're using the same bullets for both target practice & hunting. 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. For big-game hunters, the Nosler AccuBond might offer the best balance of terminal performanceexpansion and penetrationthat can be found. Before you get into all the calculations, answer this question: what do you want the bullet to do when it hits what you're shooting at? The __gads cookie, set by Google, is stored under DoubleClick domain and tracks the number of times users see an advert, measures the success of the campaign and calculates its revenue. Sign up to receive new product announcements, special offers, and the annual product catalog. *Velocity at International Civil Aviation Organization (ICAO) Standard Atmosphere (Sea Level, 59 degrees F, 29.92 inHg, 0% Humidity). It scored just behind the .340 Weatherby and has the least recoil among the cartridges tested. 10 Best 6.5mm Rifle Cartridges Available Right Now If they penetrate only 12 or 14 inches (inhibited by that same massive frontal diameter that's causing such dramatic tissue destruction), that's usually adequate. And they come in two varieties: Those designed for hunting, and those designed for target shooting. Its great for accurate target shooting. 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. For example, the sectional density of a 175 grain .308 caliber bullet is: 175/7000/ (.308^2) = 0.264 (the bullet weight is divided by 7000 to . It also demands purpose-built bullets. The Ballistic Coefficient of Rifle Bullets - CHUCKHAWKS.COM YouTube - Store data on what videos from YouTube the user has seen. A bullet with a high ballistic coefficient is slippery and less subject to drag (slowing down) as it continues on its merry way. Great info! Tips, techniques, and equipment are applied to these classroom discussions on how to become more proficient and successful at making long-range shots while hunting with AR-platform rifles. The highest-BC 7mm match bullet is the 190gr Hornady A-Tip Match, and the highest-BC 7mm hunting bullet is the 195gr Berger EOL Elite Hunter. Ballistic Coefficient is essentially a measure of air drag. document.write(new Date().getFullYear()) Copyright Hornady, Privacy Policy | CCPA Request | Accessibility Policy | Terms of Use, Designed and developed by IdeaBank Marketing, drag coefficient based trajectory calculations, Product Warning & Recall Notice - Item #8263, Product Warning & Recall Notice - Item #90226, Product Warning and Recall Notice - Item #9249, Product Warning & Recall Notice - Item #81153, Product Warning & Recall Notice - Item #82730. In the end, the best way to understand the performance comparison between two bullets is to enter their details into a ballistic solver including the muzzle velocity, and see how the predicted drop and drift compare, all things considered. The slower the bullet the less range youll have. Subscriber Services. Part of that consistency is having the same powder charge, same projectile, same rifle, and, of course, the same BC. 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. Very short and wide. The BC of a bullet is a ratio calculated by a mathematical model based off of its density and its particular shape. 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. Spitzer rounds with a boat tail have a slightly higher BC than Spitzer rounds with a flat base. Put another way, it's the ratio of the bullet's sectional density to its coefficient of form. These bullets also feed very well from the detachable magazines being used by most long-range semi-auto and bolt-action rifles. 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. In words, the Ballistic Coefficient of a bullet is it's sectional density divided by its form factor. My best "take away" was the reinforcement of consistency in long range shooting. The ability to know, in advance, how much a bullet will drop or drift in the wind at a certain distance allows you, the shooter, to make scope holdover adjustments that will increase the odds of you hitting your target. Tom says Ballistic Coefficient & Bullet Math is simple, keep reading to learn some shooting skills in our new long-range shooting science series. (w/7000) Section Density = w = bullet weight in grains (caliber diameter squared) cal dia in inches BC Section Density divided by Form Factor i Form Factor, usually represented as I, is the ratio of the aerodynamic drag of subject bullet to the standard bullet. YouTube - Store data on what videos from YouTube the user has seen - 2. Punching holes in a target? You dont have to worry about that as your ballistic software will deal with it. These bullets have extremely high BCs. Ballistic Coefficient values at Mach 2.0 and 1.75 offer comparisons to other manufacturers that publish multiple BCs based on velocity. Hornady now publishes 200 yard Mach 2.25 (2,512 fps @ ICAO Standard Atmosphere**) G1 and G7 Ballistic Coefficient (BC) numbers for all A-Tip, ELD-X, and ELD Match bullets. Richard Mann Simply put, sectional density is the ratio of weight to the diameter of the bullet. Hand-Picked Daily GUN DEALS, and Exclusive Coupons Codes >>>. 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. I dont have much experience beyond 600 yards. Scroll down to the bottom and you see that Hornady provides most of the information you need. Each one of these projectiles is engineered for tight groups at long range, By I suspect this would lower the BC..but any idea how much? Understanding basics means more game on the table, and more steel pings. The __qca cookie is associated with Quantcast. That boils down to more complex factors like shape, length, and weight distribution. Its currently available in loaded ammunition and as a component for handloaders in .277, .284, and .308 calibers. 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. Ballistics is an odd, but fascinating science, and it can be intimidating to go too deep. .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. 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 the .300 Win. In this comparison, the 6.5mm 144 gr bullet has a G7 BC of 0.336, while the 30 cal 175 grain OTM has a G7 BC of 0.263. Note that in the .308 pair, the heavier bullet (which has the greatest sectional density) has the better BC. Using B.C. USA -(Ammoland.com)-Heres why obscure [and some say boring] bullet ballistic concepts like ballistic coefficient and sectional density are essential if you want to hit targets regularly when shooting at long-ranges. And stay in touch with newsletters of our best articles on techniques, guns, & gear. CNC machined solids are probably the best for higher BC (handloaded only) and the most expensive to produce. If you chase this rabbit down the hole it will lead you around the internet and sometimes confuse you, anger you, and then all of a sudden youll have a breakthrough. Mach 1 = 1116.48 fps @ ICAO Standard Atmosphere). Get 12 Issues a year of the country's best firearms writing. The higher the number the less drag, and the more efficiently the bullet cuts through the air. However, some point out that since rotational velocity maintains itself much longer than downrange velocity, it must, to some extent, affect expansion via centrifugal force. These bullets will withstand high-velocity impact at close range and still deliver expansion at distances to and beyond 800 yards. You'll now receive newsletters of our best articles on techniques, Provided by Google Tag Manager to experiment advertisement efficiency of websites using their services. Learn all the important stuff about handgunswith none of the attitude. Mach number is the velocity of the bullet divided by the speed of sound. External/environmental variables, such as air pressure, temperature, altitude and humidity can change the density of the air. Mach 2.0 (2,233 fps @ ICAO Standard Atmosphere) and Mach 1.75 (1,954 fps @ ICAO Standard Atmosphere) BC values are also available. 2023 Outdoor Sportsman Group. Ballistic Coefficient is essentially a measure of air drag. If we change the density of what the two objects are traveling through, the less-efficient tennis ball will be affected by the change more. One of the hallmarks of a great big game bullet is its ability to offer good terminal performance from very close range to long range. Also notice the big difference in BC between the round nose bullet (.216) and the spire point bullet (.357). The main benefit of the 55-grain bullet is its ballistic coefficient. In conjunction with the hollow nose cavity and a lead-alloy core, the tip optimizes penetration and tissue destruction over a wide range of distances. Their Hybrid Target design incorporates two different shapes within its nose. How to choose one of the myriad premium bullets available today? Notify me of follow-up comments by email. Unfortunately its not as simple as just comparing the single numbers. Long range shooters who understand that Ballistic Coefficients (BCs) are an important performance measure often compare BCs to see which bullets are good candidates for long range shooting. Mag. A list of pointed (spitzer type) hunting bullets considered a good bet for long range shooting in their respective calibers, with their ballistic coefficients, follows. In actuality, the smaller caliber, lighter-weight bullet actually has a BC thats 28% higher than the larger caliber, heavier bullet. As examples of very streamlined bullets, note the BC of these Speer match type bullets. Join F&S+ to read exclusive stories by your favorite writers. Spitzer rounds with a flat base have a much higher BC than Round nose bullets. A decent BC for a bullet based on the G1 drag model is in the 0.5-0.6 range, whereas the same bullets BC based on the G7 drag model will be in the 0.2-0.3 range. We'll only use the information provided according to our privacy policy. This was done to provide the most usable BC from a trajectory prediction standpoint. The bigger the ballistic coefficient number, the more slippery the bullet, so it flies farther and faster than one with a lower coefficient. When comparing BCs of different bullets, it is important to use an apples-to-apples approach. Heres why. Type your new password and hit button below to confirm it. In actuality, the smaller caliber, lighter-weight bullet actually has a BC that's 28% higher than the larger caliber, heavier bullet. These variables, which well discuss in the next column, can change each time and location you shoot. The Matchking has a coefficient of 0.417. If they have the same mass and velocity, the energy should be identical. Different tasks require different types of bullets, and in some cases, BC is the last thing a shooter needs to consider. 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. 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. If it asks for a G7 number, use the 0.326 figure. Mag. As an example, a bullet can have a G7 BC of 0.279 above 3000 fps, but when averaged from 3000 fps to 1500 fps, the G7 BC is 0.273. The same weight bullets from other manufacturers will have different BC's, because they are slightly different shapes. Since those early days, other smart folks have developed different predictive models on bullet flight based on a variety of bullet types. Available Calibers: 6.5mm, 7mm, and .308. The results are chronicled and analyzed here, beginning with criteria. An interesting subject, this ballistic coefficient, and worth paying attention to when you select a bullet (or a caliber) for long range shooting. What Is Ballistic Coefficient? - The Lodge at AmmoToGo.com Hornady . It will also work with other .257 caliber rifles, as long as they are fitted to barrels with a very fast twist. Its a lead-tipped, jacketed bullet with a flat-point tip and a flat base. These bullets also feed very well from the detachable magazines being used by most long-range semi-auto and bolt-action rifles. Some of the links on this page are affiliate links, meaning at no additional cost to you, Ammoland will earn a commission if you click through and make a purchase. The higher a bullets BC is, the less drop, and wind deflection it will have at all ranges for a given muzzle velocity and environment. Instead, the BC is best used as a comparative number between different bullets. The G1 drag model is based off of a stereotypical spitzer bullet (pointed nose) with a flat base. Beth Shimanski of Savage introduces their all new straight-pull rifle. Very helpful! To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. Alexa analytics service - keep track on user informations. Adding more tin, the weight can go down to 545gr from the same mold. A bullet's efficiency is measured by its ballistic coefficient (BC). Originally, those smart people who did a lot of testing on the range worked out predictive models for bullet flight based on that standard projectile shape. .270-Caliber Rifle Cartridge Revival - Petersen's Hunting Just $1 per month , Without the right bullets, you wont get very far. BC is measurement of how efficiently a bullet is able to cut through air . Shooters taking these long shots have to factor in their BC to ensure the round gets where its going. doubleclick.net - browser supports cookies. Hunters who choose a 195 Berger EOL hunting bullet compared to a 140gr Nosler Accubondeven if both bullets are shot at 2,800fps would see 6 less drop and 8 less wind drift at 500 yards. BC might sound like a bunch of hooey, but it's really at the heart of bullet performance. Understanding Bullet BC (Ballistic Coefficient) - Winchester These projectiles even come with a polishing cloth. 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 an Alexa Analytics cookie that is used to track user behavior. Much of your article is reinforcement of what I have gathered previously in several different articles. Its just the love that goes into solving the problem. This website uses cookies to improve your experience while you navigate through the website. Speed and Energy are figured out using an average of all the known cartridges. The slower the bullet the less range youll have. This cookie is used to keep track on user informations and reports it to Alexa analytics service. 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. The BC-enhancing polymer tip initiates expansion, and the LRX deforms with four razor-sharp petals that create a large frontal diameter. It starts as a secant ogive like their famous VLD bullet, but as you move toward the bearing surface, the bullet changes to a tangent ogive. One is a 150-grain Sierra Pro-Hunter. So why the significant differences even though bullets were of the same diameter, weight, and velocity? Both increase the BC of a bullet. This difference in the two BCs for the same bullet is because an efficient bullets performance will be much better than the G1 model and only slightly better than the G7 model. All of the figures that follow are taken from the Speer Reloading Manual Number 13. For example, a lead round-nosed bullet can sure pack a punch! This is done so you have an accurate number that represents the bullets performance over long range. Want a bullet that has both a high BC and a consistent BC? With an Accu-Fit stock and left hand adjustable bolt, this rifle is a perfect choice for anyone! Item #3074 | 100/Box. This interactive bullet database is free and containst 173 caliber ballistics, history, stats, and their trajectories charted out in full detail. I just returned from the range today and found out some interesting stuff about b.c. vs 9.3x62 Cartridge Clash. 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. 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. All bullets start to slow down the moment they leave the barrel. The pattern element in the name contains the unique identity number of the account or website it relates to. You do not pay 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. But a higher ballistic coefficient doesnt necessarily mean it is a better bullet. But in a shtf scenario the gun I want is a AC-130 Spectre a lottery winners dream come true. Terminal Ascent will be available in a wide range of cartridgesincluding the 6.5 Creedmoor, 6.5 PRC, .270 Win, .270 WSM, .280 Ackley Improved, 28 Nosler, 7mm Rem. Contributing Editor for RifleShooter Magazine, Brad Fitzpatrick gives us a review of this modernized version of an iconic favorite. The belted cartridge can be loaded for velocities up to 3,500 fps with lighter bullets, but the best long-range loads use a heavier bullet with a higher BC and velocities between . The U.S. Army calls the round "next generation," and based on .277 Fury's capabilities, that is not an exaggeration. 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. Thats way too complicated, so lets use an illustration. Form Factors: A Useful Analysis Tool | Berger Bullets Blog This means that the speed and energy will vary from cartridge manufacturer to manufacturer. Available Calibers: 6.5mm, .277, 7mm, .308, and .338. They are also made with the longest possible hybrid ogive and are a tad bit heavier than common bullet weights associated with each caliber. AccuBond at 2600 fps. 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. A bullet's ballistic coefficient is based on a few different factors, the first of which is weight. All long-range bullets have three things in common: Theyre long and slender; theyre built to stringent specifications with a high level of quality control; and they deliver ballistic coefficients (BCs) much higher than traditional bullets. YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data. Drag slows a bullet down, and we dont want slow bullets. Not so long ago a Barrett or Cheytac was needed at a high price for shots out to a mile+. Gain a deep knowledge of ballistic science and access our improved ballistic calculator. Round Nose bullets have the lowest BC. Mathematically, it is the ratio of a bullet's sectional density to its coefficient of form. Savage Impulse Big Game Straight-Pull Bolt-Action Rifle: Full Review, How Rifle-Shot Recoil Affects Scopes, Rings and Bases, Ruger No. Another thing to keep in mind when comparing BCs is related to caliber. Ballistic Coefficient (BC) is basically a measure of how streamlined a bullet is; that is, how well it cuts through the air. Introduced in 1965 with the .444 Marlin cartridge, the Model 444 was the most powerful lever action of its day. .257" (.25) 100 grain, BC .369.257" (.25) 100 grain BT, BC .393, .277" (.270) 130 grain, BC .408.277" (.270) 130 grain BT, BC .449, .308" (.30) 165 grain, BC .433.308" (.30) 165 grain BT, BC .477. Then youll repeat the process. Ballistic Effectiveness: Which Handgun Caliber Wins? These days, most bullet data is published with BC numbers for the traditional G1 drag model, but given the explosion of long-range shooting interest, more are also publishing numbers for the G7 model which is more accurate for sleek and slender long range bullets. Eight major concealed carry insurance programs are now available to the millions of Americans who carry concealed. On the other hand, the G1 BC above 3000 fps can be 0.590, while the average from 3000 fps to 1500 fps is only 0.533. Am I long range shooter? 338cal. Bullets with low sectional density are short and fat. Now, to save you the time and effort I put in, Im going to share just about everything I know about ballistic coefficient. The bottom line is this. Weight. Note that with bullets of the same weight and style, such as the 100 grain .243" and .257" bullets or the 150 grain .311" and .323" bullets, the smaller diameter bullet always has the superior BC due to its better sectional density. One must take barrel twist into account depending on the type of 243 Win cartridge that is fired. ** Hornady BC values have been corrected back to International Civil Aviation Organization (ICAO) Standard Atmosphere (Sea Level, 59 degrees F, 29.92 inHg, 0% Humidity). 250 gr. Join F&S+ to read exclusive stories by your favorite writers. The cookie is set by crwdcntrl.net to collect statistical data such as the number of visits, average time spent on site, and what pages have been loaded, for targeted advertising. 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.
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