Volume and distance are somewhat over-rated in importance. I called one in (loudly), once and son missed it. We did another (loud) stand ~ 500 yds away, and son shot what I believe was the same coyote - it came from the direction of the miss.
I've always been a curmudgeon - now I'm an old curmudgeon. ~Molɔ̀ːn Labé Skýla~
