My best "take away" was the reinforcement of consistency in long range shooting. Now, to save you the time and effort I put in, I’m going to share just about everything I know about ballistic coefficient. HAM participates in affiliate advertising programs. What is ballistic coefficient (BC)? The Ballistic Coefficient is the ability of a bullet to overcome or beat air resistance as it is flying through time and space, and this is basically the exact opposite of the negative acceleration. It probably just means that the same pellets have been tested with different air rifles at different muzzle velocities and in different ways. Top Shooting Drills and Zeroing Targets worth $47 FREE - Limited Period Offer, Olight: Flash Sale -- Up To 40% Off On The New Olantern and Warrior X Pro, PSA: Ruger 10/22 Carbine 18.5" 10rd .22LR Rifle W/ Scope - $350 (Normally $450), PSA: Glock G44 .22LR RH Threaded Barrel Kit - $170 (Normally $200), GunPrime: Omega 12 Semi-Auto Shotgun - $200 (normally $350), Is 'Budget Competition Pistol' a Thing? In fact, airgun ballistics are subject to all the same rules of nature as centerfire projectiles, so the core principles like ballistic coefficients, drag, bullet drop, wind drift, and all the like apply to both worlds. Still, the point of impact hardly radically changes prior to the 40 yard zero. Almost all rounds have a ballistic coefficient of less than 1.0, but large rounds like the 50 BMG can exceed this normal BC. Home / Pellets / Ballistic Coefficients Table; 02/18/2019 0. Shoot slugs! Hence, for an undeformed, That can be useful when you’re selecting which pellets to choose for hunting or competition. Copyright © Hard Air Magazine. Am I long range shooter? If you have only one chronograph place it a couple of yards in front of your shooting bench and shoot a number of pellets through it. Does The Benjamin Marauder Magazine Fit The Beeman 1085? Simply put, the more aerodynamic the shape the better the BC, so domed pellets beat out wadcutters and to a lesser extent hollow points. The definition according to Wikipedia is, “the ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight.”. Out of curiosity, how do you calculate the bc? HAM participates in affiliate advertising programs. If the pellet slows more, for a given MV it takes longer to reach the target, so the drop is greater. It was nice to see it all brought together in one. Air Venturi Avenger Review Summary And Conclusions, SIG AIR M17 Pellet Pistol Reflex Sight Review And Installation. Since the primary concern about BC is for long range shooting, shotguns and handguns need not apply. Our test range is at 244 Feet above Sea Level and all testing is done on days when the temperature is between 75 and 85 Degrees F with Relative Humidity between 60 and 80% with minimal to no wind. As Why should you care about ballistic coefficients? Ballistic Coefficient (BC) is a measure of how easily a projectile moves through the air. For this example, I am going to use a Hornady 30-06 Springfield load with a 125 grain SST projectile, found here. There is a large push among long-range experts to move the industry to the G7 projectile. Other factors such as temperature, elevation above sea level, barometric pressure, and even the idiosyncrasies of individual barrels also affect BC, but these are minor enough that we won’t go into them here. All right reserved. Affiliate Links are prominently displayed under the heading “BUY FROM…”. A 60/40 is 3 inches high at 40 yards. New Pellets Added To HAM Airgun Test Reviews, Umarex Origin PCP Air Rifle Review Summary And Conclusions. It is calculated based on the sectional density (weight of the projectile in relation to its diameter) and form factor or shape of the projectile and is […], Please Note: You must be 18 years of age or older to order and conform to all laws governing the use and ownership of airguns in your local area. You already know that a pellet follows a trajectory, or in other words, instead of a straight line it has a path that curves downward. For example, as an Amazon Associate, HAM earns from qualifying purchases if you buy by clicking-through from that link. [Review]. All right reserved. So what is the standard projectile? Well, the first way is to guess. Because of our structured testing, HAM BCs are comparable against each other. Ballistic Coefficients .177- .30 every pellet Your welcome Forums › Pellets, Projectiles, Slugs, & Ammo › Ballistic Coefficients .177- .30 every pellet Your welcome Views : 832 Likes : 0 And due to the variability inherent in each individual airgun pellet, the Ballistic Coefficient of two “identical” pellets can also be different! Instead, plug in the two velocities of each shot. Love your simple explanations. If Show Printable Version; 30-09-09, 14:47 #1. mze. What is ballistic coefficient (BC)? The difference between the loads at 25 yards is .060 inch, just under 1/16th of an inch. This does not mean that either number is necessarily incorrect. However, sectional density, the relationship between weight and diameter, means that a very heavy pellet in .177 like an H&N Piledriver or JSB Beast will have a much better BC than a lighter .22 pellet. For example, as an Amazon Associate, HAM earns from qualifying purchases if you buy by clicking-through from that link. But a higher ballistic coefficient doesn’t necessarily mean it is a better bullet. Subscribe to Pew Pew Tactical's sales and deals email. Now, a look at #7-1/2 lead pellet 1200 fps muzzle velocity exterior ballistics, with a 10 mph crosswind. The critical factor related to bullet drop is time. Airgun pellet Ballistic Coefficients are a … 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. The only real difference in the airgun universe is that these effects are more dramatic at shorter distances. Ballistic Coefficients of Pellets; Results 1 to 3 of 3 Thread: Ballistic Coefficients of Pellets. Above is lead #5, 1330 fps, with a one inch sight height, and a "60/40" 40 yard point of impact. We hate SPAM and promise to keep your email address safe. Also please note that you may find the Ballistic Coefficients listed here differ slightly from those you may have seen published elsewhere. (and flight times) at any downrange point will be the same. After entering velocity of 1,032 feet per second, sight height of 2.5 inches, bullet weight of 25.40 grains (populated from the database), zero distance of 25 yards, temperature of 85 degrees, and elevation of 35 feet above sea level, I get a table showing what will happen over the distance to target. What did this exactly mean? But the keys to our reliable, accurate BCs are consistent, comparable test methodology and high quality equipment. Lead #8-1/2 pellet will have identical downrange velocities (and Let’s explore. Also, using the G1 model gives bigger ballistic coefficients, which look better in terms of marketing. In short, a high ballistic coefficient is indicative of a rounds ability to resist drag. He currently teaches concealed carry courses and enjoys spending time in Florida’s Nature Coast. Unlike 50/50 or flat shooting set-ups, the pellets are steeply on their way up at 10, 20, and 30 yards. We’ve built dozens of AR’s and we’ll cover all the best AR-15 upgrades such as handguards, triggers, BCGs, gas blocks, and more. One of the best performing pellets in that rifle has been the JSB Exact King 25.39-grain. All Rights Reserved. HAM Ballistic Coefficients are calculated using the GA drag model. Or killing a deer with one shot. and less wind drift as well. It probably just means that the same pellets have been tested with different air rifles at different muzzle velocities and in different ways. 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? Because the BC changes with the pellet’s velocity, there is actually no single Ballistic Coefficient for any airgun pellet! The pellet's The Nova Vista HP-M1000 Multi Pump PCP Air Rifle. You do not pay anything extra and your purchase helps support my work in bringing you more awesome gun and gear articles. Hard Air Magazine airgun pellet Ballistic Coefficients are intended to help the many serious airgunners who want to know typical BC values for their pellets, but who don’t have the time or resources to derive that data themselves. In the airgun world, depending on caliber and need, you might set up your scope to intersect with the bore ten or 25 yards down range. Still, there is no radical difference in Stated differently, you might say it enumerates how “slippery” a pellet is while in flight. Air Venturi Avenger Review Summary And Conclusions, SIG AIR M17 Pellet Pistol Reflex Sight Review And Installation. For this reason, and because these BCs were prepared by experimental testing, the BCs you achieve may be sightly different. Benjamin Marauder Air Rifle Test Review .22 Cal. All rights reserved. The keys to our reliable, accurate BCs are consistent, comparable test methodology and high quality equipment. For example, JSB Beasts in .22 has a BC of 0.038 when measured with a muzzle velocity of 920 fps. Because the BC changes with the pellet’s velocity, there is actually no single Ballistic Coefficient for any airgun pellet! This is a great BC for a pellet! Fourth, most slugs aren’t as accurate as pellets. It is .02 inches high with #7-1/2 lead at 25 yards, with #5 lead it is .04 inches low at 25 yards. At 100 yards, still a very reasonable distance for this .25 caliber Condor SS, we’re looking at a 10.44-inch drop. With modern ammunition, we are seeing higher ballistic coefficients such as the ridiculously high BC of the. Just as you can’t pull a rope so tight it won’t sag, you can’t shoot a pellet so fast that it won’t drop. These BCs may be valid alone, but they will not be comparable to each other – or to the HAM data. Air Rifles. And – as no two Chronographs are likely to read EXACTLY the same – any errors caused by measurements using multiple Chronys are eliminated. So, likewise, a 13gr pellet in .177 will have a much better BC than a 13gr pellet in .22, all else being equal. I may earn a small part of the sale from links to any products or services on this site. But note that Ballistic Coefficients are NOT, in themselves, a measure of accuracy. A longer zero allows a gentler angle of flight for the pellet to travel into the line of sight. It is numerically equal to the pellet's sectional density divided by a so called form factor, which is an index of pellet shape. NOTE: These HAM Ballistic Coefficients were each generated by shooting a sample of 10 un-selected pellets straight from the tin. “Your mileage may vary”. check point of impact with a shotgun, for the difference at 40 yards is
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