Love crow calling and may incorporate it in the shot tests. Haven't done it in years since they started putting seasons on crows, but I may use it for a metric. Good thought!I have seen the "golden BB" that takes down a bird at extreme distances a few times. This seems to have occurred when the bird is straight overhead. I think that these pellets that are heavier than lead are probably more likely to carry the momentum necessary for this to happen. When calling crows, killing the first bird that comes in to the call is important. If the scout goes back to the flock, the rest of them generally don't come to the call. If he drops in to check out the action, the rest soon follow. If/when the first bird comes over pretty high, it's tough to drop him. If it's very much above tree-top level, the probability of dropping the bird is slight. Maybe with these heavy pellets that has improved. I'll have to ask my buddies who are still active crow caller & shooters if they've employed these heavy shot shells. I do know that they've shot turkeys with them, and they say that 50 yards is a sure pop. At closer ranges, it smokes them.