i have some of this stufff,made back in the late 80's.
ive been trying to find out some info on it.
blue box

223 rem marked

70 grn fmj cannelure

sealed primers/crimped

IMI headstamp

not sure what application it was marketed for
leo/military/civilian

i remember seeing this stuff briefly back in the late 80's but never messed with it.
anyone else have info they could share