All I can say: Nicely done sir! Concrats.
This record will only stand as long as Carl allows it too. I am waiting to see the 1 mile shot.
Congrats Carl, on a job exceptionally well done.
I'm still speechless from the 905 yd shooting now this. Well done sir.
I think I have a pretty good approximation of what is going on with the ballistics of your bullet at very long ranges.... IIRC, you measured the muzzle velocity and BC up close, but as the bullet slows down, the drag decreases, so the effective BC goes up.... I spent some time with the JBM Trajectory /Drift Calculator, and by assuming a zero of 100 yards and playing with the muzzle velocity and BC I got a pretty good match to your previous MOA corrections.... You said you needed 155 MOA at 700 yards, 186 at 800, ~217 at 900, and ~275 MOA at 1065 yards.... By using a velocity of 920 fps and a BC of 0.30, I got the following drops from a 100 yard zero.... and residual velocities....700 yards = 153 MOA @ 669 fps800 yards = 185 MOA @ 643 fps900 yards = 222 MOA @ 618 fps1065 yards = 279 MOA @ 581 fpsThis is a pretty good match for what you found.... All that is happening is that the bullet is losing more velocity initially (corresponding to the 0.17 BC you found).... and then as it slows down as it goes down range the BC you need to predict the drop increases.... Beyond 700 yards, a BC of 0.30 is a good match, based on your drop figures.... This just shows that the bullet you are using isn't a very good match for the G1 model at those velocities, that's all.... It does give you a method to predict POI, however, once you have three known points on the trajectory.... Note the big increase in predicted drop past 900 yards, just as you experienced.... Incidentally.... this method predicts....1200 yards = 333 MOA @ 553 fps1400 yards = 423 MOA @ 516 fps1600 yards = 524 MOA @ 484 fps1800 yards = 640 MOA @ 457 fps2000 yards = 773 MOA @ 437 fpsBob
Very cool! Awesome shooting and gun!Bruce
THIS is one for the record books somewhere.....that was a great day for airgunning! Kudos, Sir. Very well done indeed.