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Old 01-05-2019, 11:13 AM
edlmann edlmann is offline
Join Date: Oct 2009
Location: lovely downtown Central Florida
Posts: 5,032

Originally Posted by tomky View Post
I was once told by some accomplished small bore competitors; is that standard velocity 22 never exceeds the speed of sound. HV does and usually slows down enough upon hitting the target to effect the trajectory. In other words HV breaks through the sound barrier and then comes back down below the sound barrier and those two break throughs the barrier affects the accuracy.
It makes sense, but I don't know enough to say it is true.
The bullet in HV .22LR goes trans sonic twice, going up (which is in the barrel) and dropping down to subsonic levels. I used to be a GCI controller and fighter pilots like being supersonic but don't like being in that trans sonic zone getting there. For the F-106, we defined that as Mach .92 to 1.05, IIRC.
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