Another old casing I can't ID:
I found another old casing that I need help with identification:
No Head Stamp.
Rimmed Centerfire Rifle
Length of Case: 2.010"
Head Diameter: 0.572"
Rim Diameter: 0.673"
Diameter at Shoulder: 0.555"
Neck Diameter: 0.514"
Inside Neck Diameter: 0.500" (or 0.474" as neck is a bit out of round)
I found this casing laying along the old Oregon Trail in centeral Wyoming it is in pretty good shape, but the neck is a bit bent so the measurements here are a bit subjective.
If anyone has a collection they could measure and shed some light on this round, It would be greatly appriciated. Thanks in advance.