C chexmix New member Dec 19, 2013 #1 I have several boxes of federal xm193 in a brown cardboard box and several boxes of federal xm193f in a white box. Whats the difference, whats the f mean. I tried to search online but I only saw sale pages.
I have several boxes of federal xm193 in a brown cardboard box and several boxes of federal xm193f in a white box. Whats the difference, whats the f mean. I tried to search online but I only saw sale pages.
