450's give identical velocities to wolf srm in my 223 with 90's. 205's were about 10fps faster.
I have in a 6.5 Creedmoor and they performed as well as BR-2's on target, but IIRC I lost about 25fps velocity. One difference also was I had a few hangfires/misfires in my first set of loads until I seated the primers a little 'harder'; I obviously was underseating them when using the feel I used for the BR-2's.Has anyone tried the Sellier & Bellot primers?
I have been load testing with them recently and they seem pretty decent, groups are not growing anyway.