Bought a brick a few months ago, as the price was right at a local store, and I try to keep some of all brands on hand for article testing. All the reports I'd heard about Winchesters leaking at a "corner" of the cup were about Large Rifle primers, but today I used some while trying different primers with the same bullet and powder charge of a .17 Hornet load.
The third round sprung a pinhole leak at the corner of the primer at the edge of the pocket, spraying powder residue and hot gas over the case head. Oh, and the shot was a flier, two inches to the left of the main (small) group. NONE of the other primers had any problems, even a soft-cupped Tula (Russian) primer designed for lower-pressure rounds like the .17 and .22 Hornet. According to Hornady, the charge of A1680 was under max for the 20-grain V-Max.
