Hi I am a newbie to this forum because the other guys could not help out. I shoot a 7 rem mag with a 160 gr nosler accubond with a bc of .531. What I found is this bc is not even close I got a bc of .39. Could this be true. are they just trying to sell bullets so they lie about it or is my figuring wrong. I used the seirra program and in order to be on target at 1000 yards in my environment this is where the bc has to be.