tag:blogger.com,1999:blog-29763791.post8950829556205464419..comments2023-10-31T05:07:19.353-04:00Comments on Delenda est Carthago: Range Report: 100m EditionDr. Φhttp://www.blogger.com/profile/14086783503820477029noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-29763791.post-74249967690457622312013-11-01T10:05:33.554-04:002013-11-01T10:05:33.554-04:00Only 2000FPS? you are way low. 5.56mm out of the...Only 2000FPS? you are way low. 5.56mm out of the box ammo normally produces 2800-3200 FPS. Lighter bullets like 55 gr are at the higher end.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-29763791.post-42826840637648469042013-11-01T10:00:48.429-04:002013-11-01T10:00:48.429-04:00http://www.google.com/imgres?imgurl=http://www.pho...http://www.google.com/imgres?imgurl=http://www.phossil.com/thom/SIG%2520556%2520Commando/SIG%2520556%2520Zero%2520Chart.jpg&imgrefurl=http://www.sigarms556.com/viewtopic.php?f%3D8%26t%3D11055&h=525&w=800&sz=85&tbnid=RzdIaHdvnHflRM:&tbnh=90&tbnw=137&zoom=1&usg=__TO9AnMFh3N2Z5gf0yU8PjRMFpEs=&docid=1kIKUQU_CObQyM&sa=X&ei=srNzUtXmFYjjsAT2toHoBA&ved=0CDYQ9QEwAg<br /><br />Mine uses the blue trace.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-29763791.post-72256146074563081522013-11-01T09:58:43.567-04:002013-11-01T09:58:43.567-04:00Your calculation is dependent on the initial angle...Your calculation is dependent on the initial angle between the sight line and the barrel, which you don't know. Further, the ammo itself will each have a different velocity(i) and therefore a different apex range (the range at which the ballistic curve is at it's highest). If the Apex range is farther than your zero range, you will have two points where the trajectory crosses the line of sight. Otherwise, only one or zero.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-29763791.post-81275206337852077352013-11-01T05:47:19.066-04:002013-11-01T05:47:19.066-04:00I use Microsoft Paint to highlight the holes. In ...I use Microsoft Paint to highlight the holes. In the drawing tools, select the ellipse, then choose red and yellow as the first and second colors, respectively. The first ellipse you insert, you will have to right click on it to tell it to fill with the second color, but after that all the ellipses will fill automatically. <br /><br />Shooting position was bench with bipod. The concrete floor of the platform makes prone too painful, and I can't hit anything standing at more that 25m.<br /><br />Mmm . . . my quick calculation is that a projectile with a muzzle velocity of 2000fps, with a sight perched 4 inches above the barrel, sighted in at 50m, should still be arcing upwards for another couple of hundred meters or more, depending on wind resistance.Dr. Φhttps://www.blogger.com/profile/14086783503820477029noreply@blogger.comtag:blogger.com,1999:blog-29763791.post-83785408666175764912013-10-31T09:50:20.808-04:002013-10-31T09:50:20.808-04:00I don't know how you have your weapons sighted...I don't know how you have your weapons sighted, but it is possible your 50 yard zero is the top of the arc, so at 100 yards, the bullet is below the line of sight. It is normally only with a 25 yard zero that the arc is high enough to cross the line of sight twice. I've had this trouble before myself since optical sights like the Trijicon ACOG zero at 100 yards.<br /><br />What was your shooting position? Prone? sandbags? standing? bipod? Bench with vice?<br /><br />What are you using for the pictures that produces those nifty high contrast yellow dots?<br /><br />--Hale Anonymousnoreply@blogger.com