DD,
I looked up arbutus/madrone and it may well be.
I didn't look up its weight, but this is equal to maple (at least) I'd say. awful heavy.
The wood I used showed no burl, but have off-cuts from other projects that look exactly like the wood pictured below, particularly in grain pattern. Wood seems to go from a yellow-ish to a pink to a brown. Old wood that has oxidised is quite brown. It is also rife with cracks...Knarly old stuff. See block on page 1.
I have photos of another gun stocked in this wood, but it is not of the correct period to show here. I Do have a small pistol flask I made from same wood, please compare it to the madrone sample blocks and tell me what you think.
Sorry the flask is incidental in the photos!
Very kind of you to enlighten me about this wood.
BTW, I Did see some slabs being sold, that would be big enough for any gun-stock. If interested please let me know and I'll look it up for you.
Thank you again,
Richard.
Edited to add more photos of this same wood;
Does it look like arbutus to you, DD?