I've got a Model 10-FCP-K that likes the 175 SMK a little better than 168. I changed the stock to get some adjustment. The Accustock actually works very well. So far the ammo that shoots best in mine is Southwest Ammunition's 175 Match. 3" at 500 meters, even with me shooting it. Here is a video. I gthink this is the same barrel as yours but this one is fluted.
http://youtu.be/6QHd16p12Sw

Glad you are happy with your rifle. I am very happy with mine.

Joe