Thanks again Fotis. This is interesting. I went back and looked at some data on my Labradar, and Litz's finding is consistent with what I’m seeing. I know this isn’t they way to do it, but just to see what it’s doing over the first hundred yards, my data is fairly consistent with what Litz came up with.
I went to the ballistics calculator and entered all of the correct conditions. My Labradar says that one 127 LRX was launched at 3,509 fps and was moving at 3,294 fps at 100 yds. Reverse engineering that one leads to a B.C. of 0.496.
One coming out at 3,450 fps was moving at 3,239 at 100 yds. That also yields a B.C. of 0.496.
One coming out at 3,438 fps was moving at 3,281 at 75 yds. That yields a B.C. of 0.502.
One coming out at 3,469 fps was moving at 3,311 at 75 yds. That yields a B.C. of 0.502.
That’s an average B.C. of 0.499
I’m certain that Litz’s methodology and equipment are far superior to what I just did with what I have. But my results are relatively consistent with (only 0.04 lower than) Litz’s 0.503, and are 0.31 higher than what Barnes publishes (0.468).
Again, I’m not saying that my methodology is worth squat by only going out 75-100yds, but it is fairly consistent with what Litz found.
