i have 1000 old *57's sitting here begging me to be used. i know about them being smaller and how people cut straw shims for the pockets,. but...i was curious if there are any new production hulls out there that have smaller primer pockets that will accommodate these old primers. the closest ive found are old school aa 410's. issue is the 57's dont have a flash hole cover and they publish that ball powder should not be loaded with these primers. so...using 296 and 2400 is out. and so is my idea of using 57's for 410. just thought id tap into some ideas for using this stuff up. lmk.
Don't know of any new ones who have the smaller pockets . You best bet is the straw trick or epoxy . It is probably not a good idea to use them with ball powders due to the lack of a flash hole cover.