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# Topic: Ballistic coefficient

###### In the News (Wed 20 Jun 18)

 Ballistic Coefficient Ballistic Coefficient (BC) is basically a measure of how streamlined a bullet is; that is, how well it cuts through the air. Mathematically, it is the ratio of a bullet's sectional density to its coefficient of form. Ballistic Coefficient is essentially a measure of air drag. www.chuckhawks.com /bc.htm   (905 words)

 Hornady Ballistic coefficients are measures of a bullet's relative efficiency. A ballistic coefficient is the measure of a bullet's relative ability to overcome air resistance. Ballistic coefficients are calculated not only with reference to a standard projectile, but with reference to standard test conditions as well. www.hornady.com /ballistics/external.php   (0 words)

 About Ballistics Exterior ballistics is the sub category that pertains to rifle and pistol bullets that are fired at a relatively low angle relative to horizontal and have no means of propulsion after leaving the muzzle. Ballistic coefficient is a measure of how well a bullet is able to overcome air resistance compared to other bullets. The ballistic coefficient of other bullets are determined by the ratio of how far they must travel to lose the same amount of velocity as the standard projectile. www.perry-systems.com /about_ballistics.htm   (447 words)

 Snipers Paradise The Coefficient of Drag for a bullet is simply an aerodynamic factor that relates velocity erosion due to air drag to air density, cross-sectional area, velocity and mass. Ballistic Coefficients are then just the ratio of velocity retardation due to air drag (or C.D.) for a particular bullet to that of its larger 'G' Model standard bullet. A good ballistic program should be able to use two velocities and the distance between them to calculate an exact ballistic coefficient for any of the common drag models. www.snipersparadise.com /ballistics/coefficients.htm   (1188 words)

 Lilja Precision Rifle Barrels - Articles: Measuring Ballistic Coefficients of Benchrest Bullets The ballistic coefficient is a value given a bullet that describes its ability to resist the effects of drag caused by the air. To measure ballistic coefficient, the velocity of a bullet must be measured at two points a known distance apart. The ballistic coefficients were as follows: the 62 grain had a BC of.238; the 64.3 grain was.247; the 68 grain Rorschach was.269; the 68 grain Euber was.264; and the 74.5 grain was.279. www.riflebarrels.com /articles/bullets_ballastics/measure_ballistic_coefficients.htm   (727 words)

 Topic of the Month The ballistic coefficient is an important and useful concept that relates the drag deceleration of a given projectile to the drag deceleration of a standard bullet. Coefficient of form, or form factor, is a mathematical number that relates a bullet’s shape, smoothness and shape at the base. The method of calculating the ballistic coefficient from velocity at two points was actually used to calculate the ballistic coefficients of 19 different cast bullets for the rifle and 32 different cast bullets for the handgun. www.loadammo.com /Topics/September01.htm   (0 words)

 Precision Ballistic Coefficient Estimator Most ballistic calculators require that the bullet be laid upon a chart of different profiles(such as the Coxe-Bugless Chart) in order to find a curve that most closely matches the curve of the ogive of the bullet. The method for determining the ballistic coefficient for cast bullets is essentially the same as for jacketed bullets with two exceptions. Estimation of the ballistic coefficient of cast bullets is nearly as accurate as with the jacketed bullets, and the calculations give reasonably good and comparative estimates of G1 ballistic coefficients. www.uslink.net /~tom1/calcbc/calcbc.htm   (0 words)

 [No title] The field of ballistics is divided into three areas: interior ballistics which deals with the behavior of the bullet inside the barrel, exterior ballistics which concentrates on atmospheric flight, and terminal ballistics which is concerned with the impact of the bullet on its target. The Ballistic Coefficient is a value used to assess the performance of the bullet relative to a 'standard' bullet using the drag curve related to the ballistic coefficient. The Yaw Drag Coefficient is a measure of atmospheric retardation of the forward motion of the projectile due to that component of the projectile face shown to the air that is offset from a nonzero yaw angle. www.cartestsoftware.com /jballistics/jbtourdo.html   (12740 words)

 Using Exbal on the Palm Hand Held  Questions The multiple "Ballistic Coefficients” form is used to specify bullets that have ballistic coefficients that change with velocity. The interpretation of this data is as follows: For velocities exceeding 2600 fps the ballistic coefficient is 0.462, for velocities between 2600 and 2100 fps the ballistic coefficient is 0.447, for velocities between 2100 and 1600 fps the ballistic coefficient is 0.424, and for velocities less than 1600 fps the ballistic coefficient is 0.405. A ballistic reticle consists of a main cross-hair and a series of aiming reference points (bars, circles, or dots) which are spaced along the vertical cross-hair. www.perry-systems.com /palm.htm   (1661 words)

 Lilja Precision Rifle Barrels - Articles: Ballistic Effects of Altitude, Temperature and Humidity Let's see what the ballistic coefficient was during one afternoon at the 1990 NBRSA Nationals held at the Ben Avery range north of Phoenix. A bullet with a ballistic coefficient of.265 fired with a muzzle velocity of 3150 FPS, a reasonable figure from a 6PPC, would drift 1.05" at 100 yards and 4.50" at 200 yards in a 10 MPH wind. The.330 ballistic coefficient bullet would blow.81" at 100 yards and 3.55" at 200 yards with a 10 MPH wind and the same muzzle velocity. www.riflebarrels.com /articles/bullets_ballastics/ballistic_altitude_temperature_humidity.htm   (1804 words)

 Ballistic Coefficient [Archive] - THR As I understand it, a bullet with "better" ballistic coefficient will penetrate better, and is often achieved by having a projectile that's longer than it's bore diameter. February 25th, 2003, 11:57 PM Ballistic Coefficient is the bullets ability to defeat wind drag, thus hold its velocity as it travels through the air. Sectional density is one of the characteristics that figures into the determination of a ballistic coefficient (I'm not really saying that right, but I can't figure out a better way to explain it). www.thehighroad.org /archive/index.php/t-10839.html   (447 words)

 exterior ballistics In the previous section the ballistic coefficient was introduced in its historical context, that is, as a parameter which was discovered and used to simplify the calculation of bullet trajectories. then the higher the ballistic coefficient of any bullet, the flatter it shoots, the better it bucks the wind, and the better it retains its velocity as it travels downrange. describes what the ballistic coefficient is, relating it to the sectional density and the shape factor of the bullet. www.exteriorballistics.com /ebexplained/4th/40.cfm   (212 words)

 .:: Crosman: Airguns, Air Rifles, Air Pistols, Pellets, BBs, CO2, Air Source, Soft Air and Slingshots ::. One of the factors that determines the ballistic coefficient of a pellet is the shape of the front end. Suppose pellets having ballistic coefficients of 0.010 and 0.020 are fired at 700 ft/sec from the same airgun. One pellet that has a high ballistic coefficient is the Crosman Premier which is a domed pellet that is available in.177 (7.9 and 10.5 grains),.20 (14.3 grains), and.22 (14.3 grains). www.crosman.com /site/crosman_u_velocity   (1125 words)

 Ballistic Coefficient   (Site not responding. Last check: ) Ballistic Coefficient Many bullet manufacturers used the form factor method to estimate ballistic coefficients for their bullets until development of the modern chronograph and other sophisticated electronic measuring equipment. Ballistic Coefficient For example, a Hornady 100 grain round nose 6mm bullet has a BC of.216: a Hornady 100 grain spire point 6mm bullet has a BC of.357, and a Hornady 100 grain boat tail spire point 6mm bullet has a BC of.400. Precision Ballistic Coefficient Estimator When a cast bullet with slightly tapered round nose is encountered, as shown below, measure the distance from the start of the nose curve, or radius, to the tip, as illustrated below, and enter that value as Nose Length. www.fitness-finds.com /directory/gunsmith/ballistic-coefficient.html   (779 words)

 RSI - Exterior Ballistic Coefficients It can be argued exterior ballistic science had developed to a point where unpredictable environmental factors such as wind eddies and temperature variations cause far greater error at long ranges then the mathematics. The Coefficient of Drag (C.D.) for a bullet is an aerodynamic factor that relates air drag to air density, cross-sectional area, velocity and mass. Ballistic Coefficients are then the ratio of velocity retardation due to air drag (or C.D.) for a particular bullet to that of its larger 'G' Model standard reference projectile. www.shootingsoftware.com /coefficients.htm   (2011 words)

 GunOwnersAlliance.com - Ask the Rabbi: Ballistic Coefficient of Projectiles The ballistic coefficient of any given projectile is a three digit decimal number assigned to it by virtue of its shape and weight. For the handloader assembling loads for a big game hunt where the game may present itself at the farthest distance a responsible hunter would shoot, both ballistic coefficient and sectional density of a prospective bullet should be studied. Ballistic coefficients of bullets are generally arrived at by using sea level as a benchmark. www.gunownersalliance.com /Rabbi_0019.htm   (367 words)

 Exterior Ballistics of Bows and Arrows The coefficient for the surface of the feather was found to be more than double the coefficient for the surface of the arrow. Having determined the ballistic coefficient Co, the next step is to solve the trajectory for a given initial velocity and given angle of departure. By assuming a certain ballistic coefficient Co, and various values of initial velocity so as to give various ranges, the maximum ranges were computed for various angles of departures by use of the tables. home.att.net /~sajackson/archery_physics.html   (3463 words)

 Toronto Catalog   (Site not responding. Last check: ) The ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. It is given by the mass of the object divided by the diameter squared that it presents to the airflow divided by a dimensionless constant i that relates to the aerodynamics of its shape. Ballistic coefficient has units of lb/in² or kg/m². www.torontopost.biz /Info/?Ballistic_coefficient   (562 words)

 Pneumatic Pnews: THE BALLISTIC COEFFICIENT The ballistic coefficient is simply a number (in almost all cases between 0 and 1) that gives an index of how well a projectile in flight resists the retardation by air. In ballistics, the higher the ballistic coefficient, the greater the fraction of the velocity retained as the pellet passes through air. Although there are exceptions, the ballistic coefficients of airgun pellets are usually in the range of 0.010 to 0.030. www.compasseco.com /blog/2007/02/ballistic-coefficient.html   (0 words)

 The ballistic coefficient (bc) The 'ballistic coefficient' or bc is a measure for the drag experienced by a bullet moving through the atmosphere, which is widely used by manufacturers of reloading components, mainly in the US. Although, from a modern point of view, bcs are a remainder of the pioneer times of exterior ballistics, ballistic coefficients have been determined experimentally for so many handgun bullets, that no treatise on exterior ballistics would be allowed to neglect it.. The standard bullet is said to have a mass of 1 lb (0.4536 kg) and a diameter of 1 in (25.4 mm). www.tuffsteel.com /Ballistics/bullfly/ballcoeff.htm   (202 words)

 The VHA Ballistics Information Page Ballistics software [for a complete review of all available software of this type, its features, capabilities and system requirements see issue #16] has opened new vistas to the sport shooter. The ballistic and health issues of high temperature can concern a shooter in any part of the country, so even if you live in Vermont and have no intention of hunting or shooting in the Sonoran Desert, the information gathered here should be beneficial. From a ballistic point of view, we could simplify the subject by saying that little temperature changes have little effect and big temperature changes have a big effect. www.varminthunter.org /ballistics.shtml   (3289 words)

 Ballistic coefficient - One Hundred Interesting Mathematical Calculations, Puzzles, and Ballistic Coefficient (BC) - A mathematical factor representing the ratio of the sectional density of a bullet to its coefficient of form. The ballistic coefficient β is a measurement of an object's ability to move through a fluid. The ballistic coefficient, the plane's speed and the altitude as well as the duration of the time slice can all be specified. weapon-sling.getinfoeasy.com /?q=weapon-sling-ballistic-coefficient   (216 words)

 Oehler Research, Inc.--Ballistic Explorer Ballistic Explorer can work with up to three loads or sets of conditions at one time, and we call each load or problem a trace. Most important are the muzzle velocity and ballistic coefficient of the bullet. The ballistic coefficient of your bullet can be entered directly to the trace window along with the velocity. www.oehler-research.com /explore.html   (1842 words)

 Ballistic Coefficient Calculations This method was used by the author to determine the ballistic coefficients of cast bullets. Then it calculates a shape factor and ballistic coefficient for a given bullet. Before the advent of the modern chronograph, many commercial bullet companies used this method to determine the ballistic coefficient of their bullet line. www.loadammo.com /product/bc-calcs.htm   (0 words)

 JBM - Calculations - Trajectory Card Terms   (Site not responding. Last check: ) The ballistic coefficient is represents the ratio of the drag of the standard (e.g. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. A bullet's ballistic coefficient then relates the drag on any bullet to that of the standard bullet. www.amasci.com /~jbm/ballistics/traj_card/traj_card_exp.html   (648 words)

 ► what are the ballistic coefficient for rifle calibers Do you have a good answer to the queston: "what are the ballistic coefficient for rifle calibers?" If so, please Submit an answer. If your answer shows that you really know what are the ballistic coefficient for rifle calibers, we will post it and link to your site to show our thanks for helping to build FAQ-Site into a valuable resource. coefficient from velocity at two points was actually used to calculate the ballistic coefficients of 19 different cast bullets for the rifle... www.faq-site.com /faqs/32/what-are-the-ballistic-coefficient-for-rifle-calibers.html   (446 words)

 LostRiverBallistic.com   (Site not responding. Last check: ) Our J36 High Ballistic Coefficient hunting bullets cost more than others, but considering that our bullets have a documented history of averaging over 80% one shot kills on everything from grizzlies to Cape Buffalo, they are well worth the money. A ballistic coefficient (BC) is the ratio of the sectional density of a bullet to it's coefficient of form (I). At Lost River Division Hooker Tactical we are able to produce hunting bullets with ballistic coefficients upwards of 0.7, which results in a more precise and accurate bullet. www.lostriverballistic.com /LRB/FAQs.cfm   (1016 words)

 External Ballistics Ballistic Coefficients are just the ratio of velocity retardation due to air drag (or C.D.) for a particular bullet to that of its larger 'G' Model standard bullet. Also, while a ballistic coefficient can be computed from velocity measurements at two points, differences in bullet wobble diminishes the validity of chronograph testing for BC change over separate series of different muzzle velocities--it needs to be done by separate measurements at different ranges for each shot. Another factor is that it is not necessarily true that the drag coefficient of a particular bullet is proportional to that of another bullet of the same design across the Mach number range, but this is what a ballistic coefficient assumes. www.frfrogspad.com /extbal.htm   (3459 words)

 Nosler "Bullets for Sportsmen"   (Site not responding. Last check: ) The higher the ballistic coefficient the higher the retained velocity will be at any given distance. Ballistic Tips from 6mm thru 30 caliber are designed for medium size game (up to 400 lbs.) using an appropriate caliber. Ballistic Tips from 8mm thru 375 caliber are designed for large, soft skinned game such as elk and moose. www.nosler.com /faq.html   (1479 words)

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