RE: 200 yard shock wave ?
I was shooting 250 SW and 100 grains of Pyro pellets today at 200 yards. It seemed like a long time between the shot and the sound of the impact. It was kida cool to hear the big thump when the bullet hit the backstop.
I was sighted dead on at 100, and at 200 it was about 8-9 inches low and 3 inches of wind drift. Wind was probley 5-7mph today. I'm going to throw 3 pellets in there tomarrow and see what the difference is.