Israeli Military Industries (now Israeli Weapons Industries) manufactures the Desert Eagle.
Yes.. offhand, I know of two. Magnum Research made the Desert Eagle available in .357 Magnum, and Coonan Arms manufactured a semi-auto .357 Magnum, based on the M1911 pattern pistols.
The first production semi auto pistol was the Mauser c/96 "broomhandle" pistol.
Kel-Tec manufactures a Model PMR-30 Semi-Auto pistol chambered for a .22 Magnum cartridge (.22WMR) with a 30 round clip capacity.
The S&W .500 magnum is a revolver cartridge, and not suited for a semi-auto pistol. The DE is available in .50 AE, not .500 Magnum
Yes
Yes, there have been a couple. At least one company (Coonan) has built a semi auto pistol that fires the .357 Magnum cartridge. A much more common find would be handguns built in the .357 Sig caliber. This is a bottlenecked .357 cartridge intended to duplicate the performance of the .357 magnum, but in an auto pistol cartridge.
There are a very few semi-auto pistols that shoot .357 magnum (not .357 Sig). While they will fire .38 Special, it is as a single shot- they will not cycle the action.
Semi-auto requires the hammer to be cocked for the first shot.
15m
@1893
15m
It's semi auto not full auto.