There's a sonic crack as the bullet breaks the speed of sound...
BUT, it's not louder than the muzzle blast.
If it were, the suppressor companies would be out of business.
Geez.
Before I call you and the two other guys delusional, it occurs to me that you may be unfamiliar with various different tyoes of ammunition. So I will restate it.
Pay attention. You may learn something.
If you go to a High Power rifle match where the range is 200 yards, and stand in the pits (where the targets are), the sonic ":crack" from either a 5.56mm 69 grain bullet launched at 2700 fps or a .308" 168 grain bullet launched at 2700 fps will be louder and will hurt your ears more than the report of the rifle from 200 yards uprange.
That's the facts, Jack.
The "muzzle blast" is louder from the firing line. (The sonic boom is not heard there because it propogates down range.) Suppressors help with that.
Suppressors have no effect on sonic booms, which is why ammo like the .300 Blackout, which is subsonic and doesn't make a boom, was invented.
