I had this custom XP built 15 years ago. It is 6 PPC with tight neck chamber, Shilen stainless barrel and 2 oz Shilen trigger. I replaced the original stock with the one pictured. I can't remember for the life of me the maker. I found him on the net many years ago and can no longer find him. He may be out of business or working under another business name. The stock was a grey laminate with stainless trigger guard and bedding screws. Hopefully someone recognizes his work.

It looks a lot like one I did last year. I used a Richards Micro stock. Started life as a rifle stock and cut down to what you see here.
Derek >>>---------->
https://i.imgur.com/WOAyZGYl.jpg