Yes, but they use the .50 calibre rifles, not handguns. There's a significant difference between a Browning .50 cal and a .50 Magnum.
Browning .50:
12.7 x 99 mm
2,810 fps - muzzle velocity
1,813 gr - weight
Magnum .50:
12.7 x 32.63 mm
1,252 fps - muzzle velocity
350 Gr - weight
HUGE...