I don't have a clue about this 357 case. I was sizing and de-priming it and noticed a ring just below the mouth. I used a micrometer on the mouth and it is .356. It also is exactly at the length of a 38 special. I tried it in my 38 special. It fits perfectly. Why would someone do this? Is there a die that will size the mouth of a 357 to fit it a 38 special. It's either been tooled or someone has a die. Oh, also the headstamp has been filed off.
I can't believe someone loaded a 38 special to 357 mag load data. The case looks good, but I think I won't use it.
Anyone ever come across this?