Can you turn 300wsm into 7mm wsm

[remcraz]

Can you run 300 wsm brass into a 7mm wsm sizer and turn it into 7mm wsm brass. I dont like the Winchester brass and am wanting another brand and does everyone that shoots the 7mm wsm use Win. brass or what brand
Thanks Ted

 

[dirtball]

Yes BUT The shoulder on the 7MM is farther forward than the 300 and 270, so you need to only partially size the neck down so that you have a false shoulder and then fireform with a modest load for the first firing.

Dave

 

[geargrinder]

Yes, exactly what dirtball said. All of my 7mmWSM is made from 300wsm Norma brass.

Here's a picture.