7.62x54R 7N13 armor piercing cutaway. Head stamp 17/97. Core made from U12A type steel with heat treatment, pointed.
Was hoping for a little help on the newer X54R armor piercing ammunition nomenclature. I have:
1953-78, 57-n-323s LPS
1995ish, 7N13 (PP)
2002, 7N26 (BP)
Thanks for any help or links!