As soon as there was more than one gun, you can be pretty sure competition started. At least for the last 500 years or so.
During and after guns were invented.
That is the National Shooting Sports Foundation. They promote shooting sports. Gun control attempts to prevent ownership of guns used in shooting sports. No gun= no shooting sports.
Gun shooting became an official sport in 1871 or 1872 when the NRA was formed, however, I'm sure, informally, people started shooting against other people for competition the day after the gun was invented, which was in either the 1300s or 1400s, depending on who you ask. According to some historians, bow and arrow shooting dates back to 9000 B.C.
A shooting iron is a gun.
The question can't be answered without knowing what type of shooting and what "gun" you mean (hand gun, long gun, centerfire, rimfire, muzzle loader, etc..)
by shooting it with a gun.
practice
nobody really knows where but i suggest you can look on who invented the gun and see what country he lives in ? sorry if this was not to helpful but its the best you can try
The gun was invented it china
Depends on where the gun range is.
The Gatling gun.
Gun clubs, shooting ranges