I would suspect the chronograph was off, reading slow. A conventional chronograph, optical, depends n shadows. Last shots of the day, getting dark, and strange readings make sense. Other thing is batteries. Just double checkMbrosch2 wrote: ↑Sun Mar 19, 2023 12:41 pm Thanks I will check it out! I'm definitely in the stage of figuring it out! Lol. I thought it was odd that they were all dead on. They were my last shot and it was nearing dark so I just wrote it down and packed it up. What's strange it that if they were in fact subsonic I much have been hearing an echo or something. I was pretty sure I could hear the "crack of supersonic. But heck I am definitely no expert on any of it.
Some bullets can create their own sonic wave due to shape and the cannelure, but you are generally at borderline speeds anyway for this to have an affect.