The men's 300 m rifle three positions was one of 15 events on the shooting at the 1908 Summer Olympics programme.

Between the two Norwegians was Harry Simon, taking silver in the United States' debut.

This was the second appearance of the men's 300 metre three-positions rifle event, which was held 11 times between 1900 and 1972.

[5] Finland, Great Britain, Hungary, Sweden, and the United States made their debut in the event.

Belgium, Denmark, France, the Netherlands, and Norway each made their second appearance.