The title “Magnum Force” reflects the
contributions of screenwriter and firearms fan John Milius, who was rewritten
by a pre-Deer Hunter Michael Cimino. Director Ted Post, who had worked with
Eastwood on Hang ’em High and tv’s Rawhide, found the star more contentious at
this stage of his career and claimed their disputes during production harmed
the film. But boxoffice results topped the original.