Does the 8x54 have the same base and shoulder measurements as a 6.5x55? If so, would it not be easier to open up the neck area of 6.5x55 dies for the 8x54 Krag chambering? Once the dies are annealed, chucking reamers would probably work, or simple 8x57 chambering reamer for the bullet seating die and rougher for the sizer die - if such reamers are still available for rent in the US?