Given the wide variety of factors that you have failed to list, I would not try to engage a target out beyond 25' with a .38 revolver. IF I had loaded some 158gr rounds, AND I was shooting it through a 6" barrel, AND I trusted the pistol I was shooting it from, I MIGHT engage a target beyond 50'. A .38cal round starts to lose some serious velocity in a very short distance. NOW! That being said, there is a difference between effective range and terminal range. Many rounds you don't believe capable of doing so, can actually travel quite a ways. Given the right trajectory, and wind conditions, your .38 can easily do serious damage to someone several hundred yards downrange.
1000 yds or so
This will depend to some degree on the barrel length. A 4 inch .38 Special revolver has an effective range of about 50-60 yards.
38 cal colt's revolver sn 94764 what year was it made?
No
Depends to some degree on the barrel length. A 4 inch revolver has a maximum range of about 1000 meters- however, the maximum EFFECTIVE range is about 50-60 meters. That is the range where a shooter can reliably hit the target.
100-300
No.
Yes.
Impossible to answer without the maker's name
2015
1974
10-1000 USD depending on specifics