I've been working on this caliber for awhile and finally settled on VV-N560 powder. Lapua brass, and various bullets in the 105gr range. I have a lot of 22-250 brass, so I've worked on reforming this, more for practice rounds, and found there is no difference using this brass (win) with a br primer. It takes a little more time to form the brass, but it works well . Cost of this brass is minimal.
This powder VV is great.
Bill
This powder VV is great.
Bill