That will depend on WHICH .38 caliber cartridge (thre are several) the length of the barrel (longer barrels= faster bullets) and the catridge itself. A very light target cartridge will be slower than a hot defensive cartridge. For a .38 Special revolver with a 4 inch barrel, velocity averages about 770 fps, but may range from 670-980 FPS.
Depending on bullet weight and powder, 650-1000 fps or more.
Depends on the load
38 cal colt's revolver sn 94764 what year was it made?
No
100-300
+P has more muzzle velocity
No.
Yes.
1000 yds or so
Impossible to answer without the maker's name
2015
1974