Keller/Hirtenberger headstamp change

Moetz in his first volume indicates that 8m/m M.93 ammunition was headstamped K&C through 1904 and H from 1905. Is it reasonable to assume commercial centerfire cartridges from this firm changed from K&C to H at the same time? What about clips? JG

I only can indicate that existed 6,5x54R Mannlicher cartridges made in Austria for Rumania with K&C headstamp even in 1908.

Treshkin: Thanks very much for the 1908 citation. It helps. JG