Not really. 338cal. Out of curiosity, how do you calculate the bc? For example, your bullet doesnt fall more at farther distances because of the distance (the bullet doesnt know how far it is traveling), but rather because it takes longer to reach a farther target, and therefore it has more time to fall due to gravity. Simply put, sectional density is the ratio of weight to the diameter of the bullet. Nice article, well explained except for the fact that you assumed people would know that they were both zeroed at 100 yards. REcently I have been casting bullets for and competing with Black powder cartridge rifles and competing at ranges out to 1000yds. We hate SPAM and promise to keep your email address safe. BC is mostly used by rifle shooters. The Standard projectile is the base we establish to gauge ballistic coefficient. Not so long ago a Barrett or Cheytac was needed at a high price for shots out to a mile+. Jim Harmer is a host of the Backfire Youtube channel. How to choose one of the myriad premium bullets available today? The ELD-X (Extremely Low Drag - eXpanding) bullet is a technologically advanced, match accurate, ALL-RANGE hunting bullet featuring highest-in-class ballistic coefficients and consistent, controlled expansion at ALL practical hunting distances. This is an extreme example but illustrates that the different shape of a projectile will affect your ballistic coefficient. Almost all rounds have a ballistic coefficient of less than 1.0, but large rounds like the 50 BMG can exceed this normal BC. | 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. This is shown by the smaller difference in BC between the two pointed bullets, .357 for the flat base and .400 for the boat tail. Two weeks after its introduction, the Hybrid Target bullet began winning matches, and it continues to do so. Don't be confused the next time you hear "ballistic coefficient" tossed around by long-range shooters. 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. Both increase the BC of a bullet. The ACE Match is only available in one caliber, and you might be wondering why this bullet is even mentioned. This cookie can only be read from the domain they are set on and will not track any data while browsing through other sites. Variation in BC with Velocity (G1, G7, etc), Manufacturing Effects on: BC, Accuracy, and Precision. The higher the BC, the less drag on the bullet. In this case, the Form Factor becomes 1.0 and the BC equals the Section Density.Read more , This But that one- mile-plus first shot GONG is addictive!!! Ryan Cleckner is a a former special operations sniper and author of the Long Range Shooting Handbook. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. 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. Built to maximize long-range performance for target shooting, Logan Schamburg from Blackjack bullets says the ACE Match bullet works very well on big-game animals too. Apr 3, 2014. 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. RELATED: 10 Best Long-Range Hunting Cartridges. Weight. Mag. It doesnt pass through the air, or the animal, easily. It wasn't hard to choose a bullet diameter and weight and a cartridge through which to test it: America is still a .30 caliber nation; 180-grain projectiles typically offer excellent sectional density and ballistic efficiency; and the .300 Win. Type your new password and hit button below to confirm it. Put another way, it's the ratio of the bullet's sectional density to its coefficient of form. The fastest, most streamlined bullet may go right thru the animal you're shooting at, so you might need to use a heavier bullet that doesn't move as fast, but expands a lot more & won't go all the way thru. Learn more about our new Long Range Hybrid Target bullets. This is because of drag caused by wind resistance. It also demands purpose-built bullets. The new Tipped MatchKing is living up to that legacy. 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. Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. I didnt know, but the term came up enough in forums, articles, and videos that I had to do some research. BC might sound like a bunch of hooey, but it's really at the heart of bullet performance. Niccolo Tartaglia was the first to notice that a shot trajectory was continuously curved. 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. #4. The G7 drag model, which is gaining popularity, is based off of a more aerodynamically shaped options with a boat-tail base (it tapers back). The B.C. For example, if you like to shoot old cap and ball revolvers you are familiar with standard round balls as projectiles. Ballistic Coefficient values at Mach 1.75 (1954 fps @ ICAO Standard Atmosphere), should be used when calculating trajectories for shooting beyond 600 yds. Ballistic Coefficient (B.C.) Ballistic Coefficient (BC) values can, and usually do change in value with changes in velocity. 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. The slower the bullet the less range youll have. Available Calibers: 6.5mm, 7mm, .308, and .338. It details drop, time, energy, velocity, range, and does so in . Red Oak, White, or Chestnut for Deer Herd? It delivers smaller BCs but is consistent throughout the velocity of the round, giving you a much more accurate representation of BC. 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. Maybe I cant slam dunk like Jordan but I can still enjoy the NBA right? My takeaway is this data is really of more interest to long range (over 300 yards?) 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. To enhance its long-range performance, Sierra has reengineered the GameKing by adding a hollow point and a resin tip. 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. Thanks! Data are also found in the accompanying charts. The G1 drag model is based off of a stereotypical spitzer bullet (pointed nose) with a flat base. Simply put, ballistic coefficient is a fudge factor. Pick a tough, bullet with a high ballistic coefficient to get the best out of it..260 Rem. It's when game such as elk, moose, caribou, mountain goats and the bigger bears are on the menu that bullet integrity becomes critical. This includes the rounds trajectory, velocity, and wind drift. If more than one bullet shoots equally well, then choose the one with the higher BC. For BC calculations, the shape of a bullet is compared to pre-determined drag models. The two most common drag models are G1 and G7. 2023 Outdoor Sportsman Group. Kimber's Hunter Pro Desolve Blak takes the firm's more affordable mountain rifle to new heights. The downside is, of course, inconsistent BC as velocity changes. 2023 Backfire LLC, a limited liability company headquartered in Utah, USA, 195gr Berger Extreme Outer Limits (EOL) Elite Hunter. 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). 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. Succinct explanations for someone just getting started. The G1 looks like more like a modern pistol round than a rifle round. Learn how your comment data is processed. Give a Gift Click below for a FREE LESSON! Additionally, in some locations, lead bullets are not allowed. Although a faster bullet isnt necessarily more accurate, its affected less by gravity and wind. 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. The round design lowers the BC and creates more drag compared to a modern Spitzer round. anything extra and your Enfield No. | BC is measurement of how efficiently a bullet is able to cut through air . .375 H&H Magnum (L), .338 Winchester Magnum (R) Public Domain. Hunters who choose a 195 Berger EOL hunting bullet compared to a 140gr Nosler Accubond-even if both bullets are shot at 2,800fps- would see 6 less drop and 8 less wind drift at 500 yards. 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. I do not know how I could have possibly left out Lapua bullets. 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. Americas oldest Second Amendment News outlet. Bullets for hunting, however, might benefit from not having an aerodynamic shape. The password should contain at least 8 characters with at least one number or special character. 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. The G7 is more representative of the current state of rifle rounds. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 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 . I dont have much experience beyond 600 yards. Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category . You can, of course, calculate the ballistic coefficient yourself, but why bother when the manufacturer tells you? Hornady's Precision Hunter 178-grain ELD-X at 2,600 fps is probably the best long-range option, but look also at the new 168-grain Berger Hybrid Hunter load from Federa l. Ballistic Coefficient . 30 Cal .308 178 gr ELD-X. This was done to provide the most usable BC from a trajectory prediction standpoint. In actuality, the smaller caliber, lighter-weight bullet actually has a BC thats 28% higher than the larger caliber, heavier bullet. For this example, I am going to use a Hornady 30-06 Springfield load with a 125 grain SST projectile, found here. We'll send you the latest guides and training tips geared This is a much bigger problem with G1 BCs than G7, but there is always some velocity dependence involved in using BCs. The test_cookie is set by doubleclick.net and is used to determine if the user's browser supports cookies. Long range shooting absolutely fascinates me. 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. shoots flat, hits hard, and fits in standard length actions. Many shooters choose 7mm cartridges for the potential of incredibly high BC bullets. .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. But it can also be rewarding, and highly educational. Note that in the .308 pair, the heavier bullet (which has the greatest sectional density) has the better BC. In words, the Ballistic Coefficient of a bullet is it's sectional density divided by its form factor. is the numerical evaluation of a projectile's efficiency in flight. //-->, Copyright GunData.org 2015 | Koenig Media, LLC | Links | Sitemap | Advertise. 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. 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. BC changes with the shape of the bullet and the speed at which the bullet is traveling, while sectional density does not. Youtube - Track the views of embedded videos. of all the other stuff like rifle, ammunition and even reloading. Did this help sort out just what ballistic coefficient is? 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. Some manufacturers offer BC values at different velocity ranges. Make sense? 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. Sectional density is easy to calculate because it simply depends on the bullets caliber and weight. The difference is eye opening. BC is a number that can be used as an input for ballistic solvers to predict trajectories. google_ad_height = 90; The same weight bullets from other manufacturers will have different BC's, because they are slightly different shapes. How much a bullet slows down depends on the density (thickness) of the air and the efficiency of the bullet. Tom McHale is the author of the Practical Guides book series that guides new and experienced shooters alike in a fun, approachable, and practical way. 8. This website uses cookies to improve your experience while you navigate through the website. This brings the cartridge into the mix, and possibly a trade-off in muzzle velocity for heavier bullets. Korean combat vet playing around with the 300 BLK in a mini 14 and the 7.62 in a mini 30. Both bullets for loading and ammo are available in 6mm, 6.5mm,. Available Calibers: 6.5mm, .277, 7mm, .308, and .338. 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. Since those early days, other smart folks have developed different predictive models on bullet flight based on a variety of bullet types. Here are a dozen bullets to help you go the distance, whether your target is an animal or paper and steel. A bullet's efficiency is measured by its ballistic coefficient (BC). You dont have to worry about that as your ballistic software will deal with it. When this happens dont leave! The cookie is used to store the user consent for the cookies in the category "Performance". The majority of industry published BCs is measured over relatively short ranges of 100 to 300 yards, which corresponds to velocities around 2500 fps depending on muzzle velocities. Copyright 2023 Pew Pew Media, Inc. All rights reserved. That boils down to more complex factors like shape, length, and weight distribution. Groups shrank as small as .328" @ 100yds. Select what level shooter you are! Weight retention (175.9 grains) was a remarkable 98 percent, and the expanded bullet measured 0.69 inch, actually larger than at 50 yards. The nail flying point forward has a very high sectional density because its long and skinny. /* GunData.org Ballistics */ With an Accu-Fit stock and left hand adjustable bolt, this rifle is a perfect choice for anyone! Ballistic coefficient makes a tremendous difference in downrange ballistics. Unfortunately, the .270's relatively slow 1:10 rifling twist, as spec'd in SAAMI's reg book, won't stabilize the stretched-out, heavy, streamlined bullets that offer extremely high ballistic coefficients. If youre looking to learn more or reload your own ammocheck out our Ammo & Reloading Definitive Resource. Its currently available in loaded ammunition and as a component for handloaders in .277, .284, and .308 calibers. (Examples being rounds like the 30-30.). vs 9.3x62 Cartridge Clash. .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. The flat point Pro-Hunter has a ballistic coefficient of 0.185. One of the first terms I ran across while discovering my fascination with long-range shooting was ballistic coefficient. Google DoubleClick IDE cookies are used to store information about how the user uses the website to present them with relevant ads and according to the user profile. I want this to be the best ballistic trajectory calculator out there. Exceptions are for those still using BC based trajectory calculators or when using BC as rating criteria for bullet performance. 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. google_ad_client = "ca-pub-8417283882784443"; Spitzer, which means pointed, is a more efficient shape than a round nose or a flat point. Both can be launched at the same speed, but an arrow will fly farther because it doesnt slow down as much due to wind resistance and therefore maintains its speed better. This cookie is set by GDPR Cookie Consent plugin. A bullet with a high ballistic coefficient is slippery and less subject to drag (slowing down) as it continues on its merry way. Mag., and .300 WSM.and as a component for handloaders. Most bullets exhibit a lowering BC as velocity slows. e dont want slow bullets. 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