Remington 45 Auto Rim (AR) (100)

Remington cartridge cases are made from a brass alloy to provide case to case consistency. Annealing leaves its mark on the brass. This can be polished out if so desired. rass is annealed to provide consistency for the reloaded ammo. Due to the manufacturing process and/or shipping, case mouths may not be perfectly round. To ensure a round case mouth, cases must be sized (or have the expander ball of the sizing die run through case neck) and deburred/Chamfered prior to loading.