ORIGINAL: Bullet Hole Bailey
My cousin brought up the bright idea to crimp down a 30-06 casing to use for a 270 since he heard that a 270 is just a 30-06 necked down. Would this work or would it just be stupid?
The .270 Winchester is indeed just a .30/'06 case necked down to hold bullets of .277" in diameter. In the necking-down process, the case neck gets slightly longer; however, the '06 and the .270 use the same set of headspacing gauges...... You missed out on this deal by about 82 years, as the .270 Win. cartridge dates from 1926.......
You need nothing special to do this, a .270 Win. FL die will do it - I have done it. As a matter of fact, I have made .25/'06 brass the same way, but I ran it through a .270 FL die first, then a .25/'06 FL die........