Originally Posted by trplem
The brass forms into 7 WSM pretty nice like.
MMM What steps do you take forming 7 WSM from 300 WSM ? False Shoulder ?
How much neck shrinkage is the result ? Genuinely curious.

I recall one of the writers ( JRS) chambered a 7x300 WSM in anticipation, but Winchester did something different, of course, and moved the shoulder forward, so you couldn’t accidentally chamber a 7 mm round in the 270 WSM.

History May Not Repeat, But it Rhymes.