Just out of curiosity, I tried to take a 7-30 Waters case and put it back to 30-30 specs…
Although the pic may not be the best, there are dents/wrinkles at the new shoulder and there is a ring around the new neck where the base of the neck in the Waters used to be…
My concern would be that that ring might be a weak spot and when fired, that bit of the neck might break and let that piece of brass move forward or maybe even up the barrel…
The next round fired—well, who knows…
Good-luck…BCB