With respect to the LRAB, I found that Nosler's BCs were COMPLETE and UTTER FICTION. They were off as much as 20% in testing to 1000 yards with accurate rifles. We used Bergers for a baseline and they were spot on. I have no idea what the regular AB ballistic coefficients test out at but it has to be better than the horrid LR version.
To the original OP, you need to do the tall target test or something similar to see what his come-ups really are. Also, try a known bullet to see if they have the same problem as the AB.
