Early stages of this project - likely on a M98 SR action I have.

I have a LW #722 factory chambered / threaded 25" bbl that I'm looking to have re-profiled along the lines of this beauty by Dorleac & Dorleac ...

Just trying to confirm the dimensions, seems from my research (including referencing the LW #5126 'H&H Small Calibre' profile) the dimensions I think I should be looking at are something like:

A: ~26mm
B: ~12mm
C: ~22.81mm (as per the LW #5126)
D: 29mm (current profile) - front ring of action OD=33mm (or 1.1" for those from nations that are still catching up to metric

) , so ~2mm 'step down' seems to look about right

The LW 'H&H Small Calibre' profile is below (but does not have such a pronounced scallop from the Nock's form as what I'm ideally after)

I'd welcome any input from the brains trust here - especially any who have an old Rigby etc, have taken measurements from one or have built in this style.

TIA