I'm with Bill Raby and others who like to work with English Walnut. I've built a lot of gunstocks with Oregon Walnut - it is softer, easier to work than English, and sometimes the color patterns are fantastic.
But I am currently working with a few pieces that Ron Scott obtained. "English" walnut, true enough, but this is from Albania or close thereby.
It is hard, with a good tight, colorful grain pattern. So far I have only inletted a wee bit in a pistol stock, and I only have one word for your tools: SHARP!. Makes me glad I have a couple good strops and lots of honing/polishing compound. ZAM seems to work well; I also have some unknown white compound that works a charm.
Oh, I also have a chunk of quarter sawn stump wood. Now that is gorgeous, but a real pain to work with!