I am installing a new Schuemann 9mm AET barrel in my 9mm major. I have two questions. These barrels are already finish chambered. What diameter should the freebore be for .355 bullets? It seems the freebore is a little snug. Both factory rounds and my own loads require a little push to fully chamber. The bullets clearly show drag marks from the freebore area. I would think you might want .0005 -.001" clearance in this area?? Second, the rounds I load are around 1.190 OAL length, should the free bore be lengthened by the same amount I have increased the AOL of the cartridge?
Thanks
Paul