A buddy gave me a 60 brass empties of 308 on M14 stripper clips w/the cardboard covers in the bandolier. The head stamps are WRA 61. Winchester Repeating Arms 1961 mfg brass? There are long lines in the brass running from the shoulder down the case. Someone said they think that they were shot in a G3 style gun with a fluted chamber and they're safe to reload. But they show no dents or crushed mouths like G3 empties should have. I'm thinking they were shot out of full auto guns like an M60. Any thoughts?