Jim M wrote:
The 50 caliber Browning machine gun bullet has a muzzle
velocity of about 2700-3000 fps, about Mach 2.5

Barrettt's new .416 round will do over mach 3 out of the barrel and
keep over mach 2 out to 3000 yds. "Reach out, reach out and touch
someone..."

The Monk