Mixed brass?

[jtr1997]

I can't find Winchester 300 wsm brass anywhere other than buying loaded ammo. I can get nosler and Norma brass but will the change the pressure?

 

[MagnumManiac]

Yes it will, by how much is anyone's guess. Simply work back up to the other brass velocity and check for grouping at range.
Sometimes we have to use what we can get.

Cheers.
gun)