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Transonic bullet flight is very disruptive to bullet stability with black powder velocity. Most of the bullets flight in 1000 yard target shooting is transonic which is roughly 1350 fps down to 900 fps. As the bullet slows down the shock wave begins to move and changes the flight character because of the ever changing center of pressure in relation to center of mass of the bullet. The disruption does not occur much while the bullet is in supper sonic or drops to sub sonic but while in transition (transonic) it really buffets the bullet stability.Any ideas as to what the transonic distance is for these bullets at these velocities? It dosnt seem to be a problem and I often think the supposed issue from coming through the sound barrier is over hyped!
That was a great hit at 1200 yards but it was one out of seven and even know that the elevation for that shot was correct I see there was no spotting scope to read wind drift, mirage or direction change at the time of the shot. I hate to bust the euphoric bubble but the hit while spectacular was chance not repeatable skill without a means to see what the wind and mirage was doing and even then it takes a highly skilled rifle team (one on the scope and one on the trigger) to catch any change in wind and mirage to be consistent at these extended ranges.
It's tough with a supersonic modern cartridge,bullet and rifle and it's doubly tough with a lead black powder powered bullet in mostly transonic flight.
There are a few folks I correspond with that shoot at 1 mile using lead, 500 plus grain bullets with black powder cartridges and paper patching in the same velocity range . All of them shoot long range (800-900- and 1000) yards regularly and they know about transonic lead bullet flight intimately and what is required to hit consistently at these extended ranges.
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