ORIGINAL: doubleA
the .25-06, .257 Roberts and .270 Win are necked down .30.06.
Ummmm....the 257 Roberts is based on the 7x57 Mauser case not the 30-06[:@]
ipcsshooter, dont ya wish some of the cartridges that are formed by using a parent case used their maiden name like some women do after they get married and or divorced


like 260 win rem or 22-250 sav rem
You are correct!

Corrected my mistake.....