My Rogge chanters lengths is measured without wooden chanter piece
D Plumwood 367 mm with brass tube in throat 377mm
C Snakewood 421 mm
B Plumwood 451 mm
I have a Charles Robert B reed which plays in B flat in B chanter.
When I got my D chanter in Jan 04 the chanter reed played C sharp but if I put that reed in my last D Rogge chanter it played in D.
I don’t think it’s the chanter. I’ve only worked on one Roberts chanter, but it was a D chanter that came straight from his workshop with a new reed, and it played in C# as well. And not very well. We did a lot of comparing of lengths and then clipped the reed a hair and it played in D, and a lot better.