Homer makes mention of competitions of rock throwing by soldiers during the Siege of Troy but there is no record of any dead weights being thrown in Greek competitions. The first evidence for stone- or weight-throwing events date back more than 2000 years in the Scottish Highlands. In the 16th century King Henry VIII was noted for his prowess in court competitions of weight and hammer throwing.
The first known events resembling the modern shot put likely occurred in the Middle Ages when soldiers held competitions in which they hurled cannonballs. Shot put competitions were first recorded in early 19th century Scotland, and were a part of the British Amateur Championships beginning in 1866.
Source: Wikipedia (of course)
Gill turned iron shots are machine turned to precisely meet the correct weight and diameter specifications.
Usually ships within one week.