i am having trouble as everyone is at finding 7 wsm brass. i have a lot of 270 wsm brass can i run them through my 7mm wsm dies and neck them up to 284 cal? i understand they are the same brass whether 7 270 300 or 325. is this true?
thanks for the input. i did not know that.They are different.
7mmWSM is the odd man out. It has a different shoulder location than the others. If you form from the others, you may end up with a donut in the neck when forming 7mm from 270 or 300 brass.