Fired some factory sierra 69gr matchings over a lab radar today to see what speed it would be out of a 16 inch barrel.... I know sierra doesn't use a 16inch barrel probably 24 but was shocked to see three flying around 2550 fps.... Their webpage shows a muzzle of 2900fps... Good news was my reloads of 24.5gr of TAC were where I wanted at 2750fps and shot extremely well.... What speed are you guys pushing yours out of an M4 or a 16 inch barrel..???? Think I might stop right here...
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