What is the exact size of a minute of angle at 100 yards? Here is one explanation to this often-asked question from a much-heralded source.
Receiver grooves accept only tip-off rings. The .22 rimfire’s minimal recoil makes the concept viable.
Bullet point of impact will change depending on the elevation. This question and answer from the vault examines the data one reader collected in 1954 while on a job in the mountains of Peru