They’re 209 primers, they’re made by Winchester, they fit into most primer pockets being .2415” in diameter, compared to CCI @ .240” , Federal and Remington @ .241”. So Winchester primers are a good snug fit, even in some euro hulls with a little help. Fiocchi and Cheddite primers are .242” in diameter and RIO primers are WAY OVERSIZED at .245”! Love me some Winchester 209’s, even though they’re hard to get right now, glad I was lucky enough to swing a extra box from powder valley.
