Shooter's ammo is a term used to refer to the ammunition used by firearms. The two crossword solutions for this term are PEA (3 letters) and PEAS (4 letters). PEA is an acronym for Pointed Enclosed Ammunition, which is a type of ammunition that has a pointed tip and is enclosed in a metal jacket. PEAS stands for Pointed Expanding Ammunition System, which is a type of ammunition that has a pointed tip and expands upon impact. Both types of ammunition are commonly used by shooters.