Dummy round help 185 BT LRT and 185 hybrid COL

[308BAR]

Anyone have their barrel specifically throat chambered specifically and optimally for the Berger 185 BT or the 185 hybrid.

Anyone able to tell be their COL and how much you're on or off the lands at that COL. How is it working for you.

I need to make a couple of dummy rounds to send to my gunsmith. Considering throating my chamber a little bit longer for my project.

Thanks!