"Gunsmith" is not ! 6.55x55 requires a long action (look at any Tikka).
99.9% of 30-06 headsize actions will accept 6.5x55.
If any issue use Win or Rem brass that has .473 rim diameter.
Works just fine and with proper throat/twist is great with VLD bullets.
If building, go with 6.5x55 "AI" or 6.5x06.
ok , "a 6.5 CM can't be rebarreled to 6.55x55 "
