Starline Brass 38SUP+PEUP100 Unprimed Cases 38 Super +P Handgun Brass 100 Per Bag
https://www.tandktactical.com/shop/810742026004-starline-brass-38sup-peup100-unprimed-cases-38-super-p-handgun-brass-100-per-bag-15282
https://www.tandktactical.com/web/image/product.template/15282/image_1920?unique=0197188
The .38 Super+P is a .38 Super case made of heavy duty material with standard semi-rimmed head design and similar internal dimensions.
