So my son has his great-great-grandpa's 38-55, built at the turn of the 20th century. Just discovered 60 rounds, all decades old. Some had this scoring or ring on the cases:
-not sure what it's from or whether what that would be safe to use, or should be pulled and discarded. Secondly, outside some 22's his other late great-grandpa's .22/410, never fired ammo this old. Safe?