When I was firing from the 1180 line, it did sound like I could hear the bullet going downrange. We watched these guys shoot all day for 5 days, so there was no mistaking when the subsonics came to the line. You could follow the path with your head, it was so slow, and the swishing sound was distinctive. Most shots went Boom, and we never noticed a supersonic crack, but the subsonic guys, would make a long whooshing sound all the way from the line to the target (if I can duplicate it in writing) sort of a Boom, shshshshshshshshshshshshshshshshshshshshshshshclang. I was standing at the side of the range, about half way down, 100 yards from the edge and behind a barrier. Originally Posted By: hankpacWhile target setting at the international silhouette shoot in Texas, I heard subsonic large bore rounds going down range. I have duplicated that in the range when siting behind a berm, setting targets for. In firefights, AK and SKS rounds would snap overhead, Very sharp, not explosive like the noise on the video above, but more of a SNAP. While target setting at the international silhouette shoot in Texas, I heard subsonic large bore rounds going down range. Re: Bullet 'crack' at subsonic velocities? Update: Here's the video, I rushed it so it's not very good. I'll get the video put together ASAP and update. It would be great to get Brian Litz's, or Lindy's thoughts on this. I'm going to edit the video to include clips of misses so that only the crack is heard, and not the steel getting hit. Am I hearing the supersonic crack from the bullet 80 to 100 yards earlier after it dropped subsonic? Or what am I hearing? At first I thought it was the muzzle blast, but when turning up the speakers, I can hear the muzzle blast. There is quite a bit of noise as the bullet goes by, however it's not the high pitched crack that you get when shooting a very much supersonic bullet, it's a bit lower sound. I'm shooting 175smk's at 2650, conditions were 29.22" 48% RH and 45 degrees. Ok, I just got back from shooting a bit ago and was reviewing target cam footage from 1180 yards.
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