1897  There is a little "snipping" [sic]--i.e. working old bars--on Forty Mile Creek, but it does not pay much.
1963  Chinese miners were particularly adept at sniping and have worked in most camps and on most creeks . . . Sniping and bar-combing are continuously being carried out by individuals who would rather do this than work for wages, and the number so engaged increases in hard times.
1965  "Sniping," usually done by the individual, is studying an area and selecting sections of bedrock for working or reworking old tailings.