You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. For the most stable and predictable flight, it is best to keep the bullet in the supersonic (black text) region. The user inputs the bullet and gun properties as well as atmospheric information, sight scale factors and zero . Bullet Properties. First off, any rifle with a stock needs to have a barrel length of 16 inches or more, and an overall length of 26 inches or more (with the stock extended). Thank you. Thank you for coming by The Everyday Marksman. Then get a barrel with the slowest twist that will stabilize that bullet. conditions and then applying the elevation angle at zero to different atmospheric That Accupoint is almost a red dotRead more . The walls of the chamber arent going to give way to expanding gas. The Federal Ballistics Calculator lets you quickly determine the trajectory for any rifle or handgun load, and save data for an unlimited number of loads. Reloading data is available as low as 99 per cartridge or purchase a subscription and receive new data . Winchester Ballistics Calculator. barrel length: CCI 27 gr. You would like some idea of the velocity, but the only load data for the bullet weight is for 22 barrels. Sierra includes a section in their Reloading Manual that gives a good, but basic, introduction to some of the concepts of exterior ballistics. By that, I mean that the bullet would move far enough down the bore that pressure would start to drop behind it. . HVTCHP Yellow Jacket: Remington 36 gr. A whole new world of hunting and target-shooting options open with that difference, a fact sometimes obscured by the cartridge's subsonic and military roots. // ]]> [] one a feel for how much muzzle velocity changes with barrel length for a given load. The interior grooves and contours will affect the bullet as it leaves the gun, resulting in less or more velocity. cartridge. Thats still useful, though, when you think about it. This can have a big impact on AR velocity and might be a reason that two similar length barrels have a different velocity. Use Bullet Library Ballistic Coefficient (lbf/in2) Drag Function Muzzle Velocity (fps) Wind Wind Speed (mph) Wind Heading Rifle Information Zero Range (yards) I have used this to 730 yards for first round hits. to do testing, and have expanded the data to include an additional 8 handgun calibers/cartridges The difficulties of ballistics calculation have to do with data collection, not calculation methods. The longer barrel will allow you to reach higher velocities, but I don't think it'll make it any more or less accurate. But in terms of basic trajectory calculation, point mass is the workhorse of the industry. Vortex Long Range Ballistics Calculator. Just have to make sure all the info you put in is correct. 5865 S 77th Street My charts arent showing you what happens at across the room distances. For instance, you can compare a 250 gn RN in the .30-06, .338-06, and .35 Whelen by selecting each from the cartridge window, with no need to go to the bullet window. By locking the cartridge into the chamber, the entire bore of the rifle becomes a rocket nozzle. Two great brands have finally come together. Of course, it varies depending on velocity and accuracy, but usually around 400-600 meters. Start with the .243 Winchester Our calculator creates a proper ballistics trajectory chart that details range, drop, velocity, energy (fps), wind drift, and time. One big misconception out there is that a longer barrel makes your rifle more accurate. Excellent post! The range interval at which the results are printed in the trajectory table. Vortex Long Range Ballistics Calculator. To ensure you have the best experience possible, this website uses cookies. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. graphs. I think the error youre seeing stems from something wrong with Google Sheets, as this is the chart for 300 yards and you can see where the zero should be set. Hi Mat, Im Jimmy and really like your information, do you have something similar to the ballistic info or point blank zero on the commercial 308, say from PSA AR10 platform 18 barrel? I havent actually created any charts like this for a 308, but if you know the bullet and velocity I its relatively easy to find the right point blank zero with JBM. An AR-15 supports many different calibers. The calculator uses the point mass method, also known as a Three Degree of Freedom Method (3DOF). Upon closer inspection, it looks like both the 200 and 300 yard charts are showing intersections at 225 and 325 yards. Lets come back to my original statement about engineering voodoo. Bullet Library. In the most accurate load, the 168gr HPBT handload, the velocity difference between longest and shortest was only slightly more than 15%. Without his help all of this would have [2] Case volume is not available in many, if not most, reloading data sources. Need a new scope at an affordable price? This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. + Newsletter+ New Content Alerts+ Deals and Sales. The issue with barrel length and velocity was also interesting in that, across all bullet weights, the extreme variation is only 31% (110 VMAX @3202 and 208 AMAX @2215). The first is with a 20 barrel firing M193 at 3300 FPS, the second is a 16 barrel at 3100 FPS, and the third is a 12.5 barrel at 2900 FPS. : "http://www. We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our A 100-yard zero means that you only ever have to think about holding your sights higher on the target. This particular article is somewhat AR-15 centric, but the principle still applies to other rifles like bullpups. It has all the details laid out nicely. The platform used for this is a Shilen match barrel which began at 26 inches in length and ended at 13.5 inches. Thanks for reading, and please dont hesitate to ask any questions down in the comments! the 100 yd zero looks ok but the 50 yd zero goes through zero at 75 yds. As a rule, figure 50 fps per inch of barrel, plus or minus, if your barrel is longer or shorter than 22 inches." However, they do not say what category of . Its a bit harder to get exactly 36 yards. Sure, they are pretty close, especially with a 20 barrel, but do not think that because you zeroed at 50 yards it also means youre dead on for 200. If you notice the actual suggested zero distances for these rifles, annotated as MaximumPBR Zero, those arent common zeroing distances. (Yes, your reloads are being given credit for being better than average!). Another load only showed an increase of 262 fps 20.15 fps per barrel-inch which is well below the 487 fps average. Start with the .223 Remington Was hoping to get a better response. Thanks for using the external ballistic calculator from GunData.org that accurately details all aspects of the bullets trajectory the millisecond it leaves the guns barrel. It sounds like from reading this it may be better to set the 45 degree to zero @ 50 yards and the variable zero at 200 yards. For the mathematically inclined, Robert McCoy's Modern Exterior Ballistics: The Launch and Flight Dynamics of Symmetric Projectiles is a great overview of both historical and modern methods. They feel like "it is it is a perfect balance of weight to barrel length." It is between a Medium and Heavy Palma, and a little closer to heavy than medium. This is in contrast to the original Powley constraints limiting us to more or less full loads using IMR powders. Even within AR-15s, muzzle velocity might be very different from gun to gun. To that point, remember that I didnt consider the bullets energy in any of these charts or graphs. The Federal Ballistics Calculator lets you quickly determine the trajectory for any rifle or handgun load, and save data for an unlimited number of loads. All of these calculators find the muzzle velocity at the shooting temperature by How to Sight in a Scope - Step by Step Guide. Barrel shape and design will also impact velocity. That means that the projectile is modeled as a point in space and affected by drag and gravity. This information was pulled from Federal's website. grains. Like Vaughn's book, it's about more than ballistics and has a heavy experimental (as opposed to theoretical) angle. When you look back over the history of the AR-15, youll find that we didnt just end up with a 55gr .22 bullet fired through a 20 barrel. In response to the phenomenal popularity of the site, we've continued If you measure the velocity of your 24" barrel, then cut it to 20", you can very accurately calculate the velocity lost. At each range, handloads were used to seek out advantages given . The shape of the bullet might cut through the air more efficiently, resulting in a higher velocity. Hits like a 9mm Luger. 4DOF, 6DOF, and some tweaked point mass calculators model spin effects in various different ways. // ]]> //