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. Long range shooters have to practice, and they must have consistent ammo to practice. My next preferences is Sierra, Swift and Hornady. The __qca cookie is associated with Quantcast. 30 Cal .308 178 gr ELD-X. OK, so with the Sierra flat point Pro-Hunter, I picked an unusual bullet to illustrate a long-range shooting ballistic concept, but thats OK. As a shorter-range hunting bullet, its going to show the impacts of differences in ballistic coefficient more dramatically. A bullets density is a ratio of a bullets mass and its cross-sectional area. Available Calibers: 6.5mm, 7mm, and .308. Mag. Making those long range shots past a 1000+ nice! Available Calibers: 6.5mm, .277, 7mm, .308, and .338. All of the figures that follow are taken from the Speer Reloading Manual Number 13. The higher the number, the less drag the projectile will experience. BC will help you determine the effective range of a projectile by taking drag into account. The Matchking has a coefficient of 0.417. Get the 76th edition of the World's Greatest Gun Book. @StLPro2A: Youre not geeking out. 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. With the right BC you can make a . The higher the number the less drag, and the more efficiently the . Eight major concealed carry insurance programs are now available to the millions of Americans who carry concealed. They need to be able to factor in how far the wind will move their round, bullet drop, and velocity at different ranges and it all ties back to the BC of their particular load. Their Hybrid Target design incorporates two different shapes within its nose. You have entered an incorrect email address! Enfield No. I wonder if anyone has validated a continuum mechanics equation with rifle testing a super high speed sensors. The new Sako Finnlight II sports an innovative stock and Cerakote metal paired with the terrific 85 action. Knowing ballistic coefficient allows you to calculate how far your round flies as it loses velocity. Mag. You might see different BC numbers for bullets at different velocity ranges. Ballistic Coefficient (BC) is basically a measure of how streamlined a bullet is; that is, how well it cuts through the air. Now, to save you the time and effort I put in, Im going to share just about everything I know about ballistic coefficient. Good write-up Tom. Make sense? His books are available in print and eBook format on Amazon. 600 Rounds Winchester 5.56 55Grain XM193 FMJ Stripper Clips & Tool $240.00 FREE S&H REBATE, AR-15 Barrel Length Does It Even Matter? 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. To grossly abuse math and physics, bullets with high sectional density are long and skinny. And the .300 Win. I dont see how a BC can be constant for varible velocities over a given trajectory. I dont have much experience beyond 600 yards. Copyright 2001, 2013 by Chuck Hawks. The Ballistic Coefficient of Rifle Bullets. Remember High Cost does not equal High Performance. If it asks for a G7 number, use the 0.326 figure. I want this to be the best ballistic trajectory calculator out there. 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. ** 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). This makes the bullet less sensitive to seating depth and makes load development much easier. The first thing to note is that not all bullet manufacturers measure their BCs in the same way. Give a Gift A high BC bullet can maintain velocity better than a low BC bullet under the same conditions. Backfire LLC owns and operates this website. !, Next article-Brass how to choose which is better? Inspired by Bob Beck, the host of the TV show Extreme Outer Limits, the Berger EOL was designed by noted ballistician and bench-rest shooter Bryan Litz. This aerodynamic tip enhances the bullets ability to resist gravity and wind, and it ultimately reduces flight times. presaged the 6.5mm frenzy. You do not pay