Back when Charlton Heston was president of the NRA I made it a point to always read his commentaries in the National Rifleman. Second Amendment discussions brought to light
how our heritage is so closely intertwined with guns, shooting and hunting. I began to compile a list of gun/shooting adages until I finally have a bunch.
Some examples are:

Straight Shooter - an honest person
Taking Aim - choose a direction for some endeavor
Jumping The Gun - begin before the time to start
Cheap Shot - taking advantage when another is vulnerable
I Have My Sights On - to set a goal or direction
Hotter Than a Two Dollar Pistol - stolen goods, probably not worth the price paid
Lock, Stock & Barrel - complete, everything included
Set Your Sights High - set your goals high
Up In Arms - highly agitated
Smoking Gun - evidence
Hair Trigger - very unstable, possibly unsafe, precarious
Bite The Bullet - to proceed, regardless of the outcome

These are just few of the list. I'm sure some of you have some of your own.