Balck powder cartridges, long range, and the speed of sound
Just curious, as I know that high power, long range shooting takes into account when a jacketed bullet will stay above or below the speed of sound/sound barrier of approximately 1100 fps, depending on altitude, humidity etc.
Does the sound barrier velocity/ about 1100 fps affect the big black powder cartridges as to accuracy as much as jacketed bullets?
Seems a lot of the long range "buffalo cartridges" used in the past and the BP cartridges used in the hitting steel targets at long range are starting out in the 1200-1400 fps muzzle velocity range. I realize these big 40-45 caliber boolits hold velocity quite well, but it would seem somewhere down range, they are going to drop below the Mach speed on their way to 1000 plus yards.
Do the big bore boolits get erratic or loose accuracy as do the jacketed bullets when dropping below the speed of sound?