Best Sig Sauer Brass 243 Win Bag of 50 Online. Sig Sauer cases are made from American, premium brass. These casing are rigorously tested to ensure unparalleled durability and dependability, each casing undergoes rigorous in-line and postproduction quality assurance testing to ensure a flawless casing.

Brass Preparation: With bulk rifle brass you may sometimes notice a few case mouths are “out of round” or slightly dented below the shoulder.  Brass manufacturers are aware of the case cosmetics and have worked to mitigate it.

With all new rifle brass, you should first straighten out the case and case mouth. To straighten the case mouth, run the case part way into the sizer die and let the expander ball straighten the brass.  To prevent the case neck from stretching, be sure to lubricate the case neck inside the case mouth. Related