Talk about a hair trigger. Posted by lokeuei on April 9, 2011 Posted in: Guns, Gunsmithing, USPSA. Tagged: 1.5lbs, awesome, hair trigger, light trigger, open, sv frame, timney trigger scale, uspsa. Leave a comment Just put the Timney trigger pull gauge on my new SV Open Gun to see where the trigger breaks and it clocks in consistently at 1.5lbs! This is sooo going to wreck my Revolver mojo.. Lucky I’m only shooting this later in the year!