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The 7mm caliber offers some of the highest BC bullets on the market. 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 would imagine the best BC would be the Berger 168 VLD. These two bullets, while of the same weight, have different ballistic coefficients. 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. We appreciate your patience and continued support! In summary, comparing BCs is a natural thing to do for shooters interested in long range performance. Weight. Lets design a standard bullet and do all the math for that one. Drag slows a bullet down, and we dont want slow 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. Available Calibers: 6mm, 6.5mm, .277, 7mm, and .308. Put another way, its the ratio of the bullets sectional density to its coefficient of form. BC is a number that can be used as an input for ballistic solvers to predict trajectories. No 168 grain .308 caliber bullet will have a high BC, simply because it is an awkward shaped bullet. Mach 1 = 1116.48 fps @ ICAO Standard Atmosphere). I like the way you played it out, easy to understand for me as a new loader. Mathematically, it is the ratio of a bullet's sectional density to its coefficient of form. 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. Remember High Cost does not equal High Performance. 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. Simply a .308 case necked down to hold 6.5mm bullets, it was a popular wildcat before being adopted by Remington. The best styles for long-range shooting will have high density and aerodynamically efficient shapes. You'll now receive newsletters of our best articles on techniques, This is an Alexa Analytics cookie that is used to track user behavior. Registration on or use of this site constitutes acceptance of our Terms of Service. 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. It's often been compared to the 6.5 Creedmoor. The pattern element in the name contains the unique identity number of the account or website it relates to. google_ad_width = 728; Their Hybrid Target design incorporates two different shapes within its nose. Ballistic coefficient is typically measured with a 3 digit expression. I didnt know, but the term came up enough in forums, articles, and videos that I had to do some research. A slower barrel twist of 1:10 is generally adequate to stabilize bullets weighing up to 100 grains, while the accuracy of heavier, higher ballistic coefficient bullets is improved by a 1:7 or 1:8 twist. This includes the rounds trajectory, velocity, and wind drift. e dont want slow bullets. As Sectional Density is a key input to Ballistic Coefficient, well look at that first. They are also made with the longest possible hybrid ogive and are a tad bit heavier than common bullet weights associated with each caliber. Available Calibers (in 2020): .264, .277, .284, and .308. An example would be a .459 dia cast bullet with a 440BC at 560grains. 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. Bullet Ballistics & Charts GunData.org Note that in the .308 pair, the heavier bullet (which has the greatest sectional density) has the better BC. Available Calibers: 6.5mm, 7mm, and .308. Subscriber Services. 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. The slower the bullet the less range youll have. 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. Your choide for the two examples was excellent.. at first I wondered why you were trying to compare two radically diffferent bullet shapes.. THEN it hit me the differences would be so radical they would be very distinct, then you could go into the details and explain WHY. Also notice the big difference in BC between the round nose bullet (.216) and the spire point bullet (.357). 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. Ballistic coefficient (BC) is a mathematical representation of how efficiently a bullet flies through the air. Kimber's Hunter Pro Desolve Blak takes the firm's more affordable mountain rifle to new heights. That doesn't seem to be an overstatement, based on the Ballistic Coefficients (BC) WTC has published on this new line of bullets. A quarter flying this way makes a lousy bullet, right? Slow-burning, temperature-stable propellants like H4831SC and . Its long and narrow, so the surface area pointing into the wind is very small. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". ; ), BC = Section Density divided by Form Factor. The downside is, of course, inconsistent BC as velocity changes. Ballistic Coefficient values at Mach 2.0 and 1.75 offer comparisons to other manufacturers that publish multiple BCs based on velocity. All rights reserved. Different tasks require different types of bullets, and in some cases, BC is the last thing a shooter needs to consider. Introduced in 1965 with the .444 Marlin cartridge, the Model 444 was the most powerful lever action of its day. Remember that in our example, the Matchking had a coefficient of 0.417 while the Pro-Hunter had a BC of 0.185. As Hornady moved into production of these bullets, the BC value increased (a positive gain) due to the improvements in the manufacturing process from R&D to production machinery. This cookie is set by GDPR Cookie Consent plugin. To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. Ballistic Effectiveness: Which Handgun Caliber Wins? Red Oak, White, or Chestnut for Deer Herd? The extremely poor SD of the .224" bullet lowers its BC, even though its shape is similar to the others. But there is less difference between the trajectory of the flat base spire point bullet and the boat tail spire point bullet. Join F&S+ to read exclusive stories by your favorite writers. For example, if you like to shoot old cap and ball revolvers you are familiar with standard round balls as projectiles. 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. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Spitzer, which means pointed, is a more efficient shape than a round nose or a flat point. 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. YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. 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. 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. Analytical cookies are used to understand how visitors interact with the website. During this time of overwhelming demand, our team is doing everything possible to produce more bullets and ammo than ever before. To do this, bullets should be compared at a given Mach number (e.g. 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. PDF Ballistics Coefficients - Rifle - Sierra Bullets Just an old curious guy. Luckily, there are, G1 or Ingalls (flat base with 2 caliber (blunt) nose ogive by far the most popular), G5 (short 7.5 boat-tail, 6.19 calibers long tangent ogive), G6 (flat base, 6 calibers long secant ogive), G7 (long 7.5 boat-tail, 10 calibers tangent ogive, preferred by some manufacturers for very-low-drag bullets), G8 (flat base, 10 calibers long secant ogive). There are lots of ways to describe what ballistic coefficient is.

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