Warning with a question at the end: Fired some Hornady 762x39 123g SST ammo (lot#3181524). Shot very well. But when I went to reload the cleaned cases, WLR primer would not go in with normal pressure with my handheld primer tool so I did not force it. It was not crimped (see Hornady reply). And it was NOT small primer (though Hornady does make cases like that: I bought some). I have some primer go-no-go tools and it was definitely too big for small primer and the large 'just right size' tool would not budge into the primer hole. Asked Hornady about it. Hornady's prompt answer to my email contact: "That case has a large primer pocket and you will, most likely, find the primer pockets are tight due to the fact this is primarily a semi-auto cartridge." I succeeded in enlarging some of the primer pockets with a hand drill on high speed with Hornady's Large primer pocket reamer bit. But it took a LOT of drill time (total of maybe a minute) that had to be broken into 10-second bursts because the brass got really warm through my mechanics gloves. Question: Are there other WLR-equivalent primers that might be a tad smaller in diameter and still compatible with WLR primers for loading? Edit: primer pocket reamer name for 'pocket decrimping tool'