Dirty Harry "Rawhide", was responsible for creating Callahan's distinctive old-fashioned brown and yellow checked jacket to emphasize his strong values in pursuing crime. Filming for "Dirty Harry" began in April 1971 and involved some risky stunts, with much footage shot at night and filming the city of San Francisco aerially, a technique for which the film series is renowned. Eastwood performed the stunt in which he jumps onto the roof of the hijacked school bus from a bridge, without a stunt double. His face is clearly visible throughout the shot. Eastwood also directed the suicide-jumper scene. The line, "My, that's a big
Dirty Harry round put up by the MoD. Dirty Harry round Dirty Harry is the name given to the special round chambered 5.56×45mm. The rounds are designed by BAE Systems and were safety and performance tested by QinetiQ to supplement the existing 5.56 standard NATO ammunition issued to British Forces. The necessity to use a more powerful round in place of regular 5.56mm NATO round was felt due to its unsatisfactory performance in medium-range engagements. This resulted in the Ministry of Defence (MoD) requesting the development of a special round to be used from the existing SA80 rifles resulting in Dirty Harry. The