No, there are .357 caliber bullets that are not magnum, but they are in the minority.
Which .50 cal, and do you mean .357 Magnum? If you're comparing the .50 AE to the .357 Magnum, the .50 AE is more powerful, by far.
100-400 or so
Yes, you can fire a .357 Sig round (not a .357 Magnum) in it, but you must first change out the .40 barrel for the .357 barrel.
The Desert Eagle comes in the following calibres: .50 Action Express .44 Magnum .357 Magnum .440 Cor-bon .41 Magnum .357/44 Bains and Davis (Israeli Prototype only)
No, you can only use .38 caliber rounds.
100-300 USD
A .357 Magnum firearm requires .357 Magnum ammunition.
buy a pistol cleaning kit that matches the correct cal.
The Model 29 is a 44 Magnum.
A .357 Magnum can shoot .38 Special rounds as well as .357 Magnum rounds.
The .357 Magnum is more powerful, all day long.
Yes and no. The. 40 S&W is not interchangeable with the .357 Magnum, if that's what you had in mind. Most .357 Sig pistols can, however, but a .40 barrel will have to be dropped in in place of the .357 Sig barrel.