The Germans used an Anti-tank rifle in WWI that was right at
.50 caliber. I believe that the inspiration for the cartridge came from that.
But Browning did want it in an aircraft role. I know it gets used on a regular basis
for point shooting of personnel in the Sniper role, But is it not against the Geneva
convention to do so? The concept of the heavy caliber man portable rifle was not
for tagging tank commanders at 1500 yards or so, It was as an A.M.R. or Anti Material Rifle.
Drop a two man team behind enemy lines with one of these nice heavy caliber semi-automatics
They work into position next to an airfield and start putting half inch holes in Engines,
Radar dishes, a nice API round into a fuel truck, That sort of stuff. Two men can precisely
do a lot of damage in a very short period of time from a decent distance away.
Then they were to disable the weapon, abandon it and disappear to be picked up at a pre-determined place. As I understand it, these teams were first used in Panama but I am not exactly
sure of what weapon they used. There was also a 20 mm weapon that fires a Sub-caliber Sabot-Flechette projectile That will penetrate just about anything armored except the heavy tanks.
These may no longer be in service though. I have a picture of one somewhere, I will try to find it.
It was a Brute of a Weapon. To answer the initial question though, I know of no one who uses
one for hunting. not only because of the over-kill factor, But because toting one around in the field
would make for a miserable hunting experience. I Have heard they do quite well when chumming up and blasting Sharks from the upper deck of a boat though. I've Never done it but I would bet it would be a hoot...