Thread: 7mm wsm to 270wsm sizing

Hmm, depends if its actually been fired in a 7mm wsm or a 7/300wsm which are popular with the target crowd.

If it's a 7/300wsm chamber then it will be easy to go back down to 270.

If it's a true 7mmwsm chamber maybe not so easy.

The unfired vs fired brass will give the answer.