Tw,
sounds about what I've experienced with pitch. I have a beautiful Crass that was expertly restored, but has near 0 pitch. This causes the gun to slip from my shoulder at least half the time I shoot. The gun is too well done to a factory 115 year old buttplate to alter it. I've been thinking about a little piece of tapered rubber with 2 way tape to add to the heel.

I've never understood why pitch was measured in inches at the muzzle rather than angle of the butt. An inconsistant way of measurement as the length of a gun differs from one to the next, sometimes greatly. It should be changed IMO.