Same thing happened to me Sunday. I was shooting pretty well, even hit a couple x's and 10's on a few targets that have given me trouble in the past. Was feeling really good about a mule deer target about 34 yards away. Drew back, zoned on the 10 ring, let her fly, and missed the target 6" low! WTF! Shot again, perfect height, but 18" left! All right, one more time. Burned a hole in the 10 ring AGAIN, and smoked an x. Frustrating to say the least, but at least we proved we could do it! Lol. Who knows what happens sometimes. Finished the round fairly well, even in the fading light.