Hi gents,
Can someone with a CZ 550 in 416Rigby please measure the boltface so I can open mine from .545" to accommadate the 416Rigby head/rim size, I'm guessing it should be around .600".
I just sold mine and wanted to upgrade, none available, so I'm building one from a 458WinMag.
Thanks in advance gents.

Cheers.

Okay, my bolt shows outside dia. of 0.707" (Midway caliper) and the bolt face right at 0.600" inside the raised parts of the face.

Case dimension per Ken Howell's book shows cartridge rim dia. @ 0.5902"

I am NOT a gunsmith.

Barry

Thanks guys, that confirms my suspicions.
I really appreciate the effort.

Cheers.
416RigbyHunter.