In my view, there is not enough rifle and bag "violence" associated with the mild recoil and low torque imparted to the system by the Dasher to warrant consideration of "special" stocks. Any 3-inch forearm stock of either wood or fiberglass from a reputable vendor should do.
Because of the mild manners associated with the Dasher, your particular shooting style/preference really ought to govern in selecting the style of stock. If you like to "grip" the stock and embed it in your shoulder (beneficial if clay birds are used as spotters), then the stock you are currently contemplating or a similarly configured stock (e.g. McMillan Tooley MBR) appears to be a reasonable choice. It may or may not be satisfactory as a free-recoil stock. The short range bunch has pretty much worked that design out.
An often overlooked aspect of stock selection is compatibility with the rear bag. Checking with the stock vendor about the stock width that sits in the ears and what bags actually work with that width bears consideration. A custom rear bag may be required to have the stock track properly.
Weight of the stock can also be an issue. Check with your gunsmith concerning what weight stock you really ought to have with the components you intend to use. Laminated stocks can be heavier than fiberglass, so it pays to ask the professional you intend to have birth your rifle what the maximum weight can be prior to making any purchase. "Whittling" to make weight will not make you or your gunsmith happy. Speaking of gunsmiths, I'd ask his opinion about whatever stock(s)you are considering. Folks that participate on this forum are well-intended, but your gunsmith's apraisals and preferences are far more impotant than what any of us have to say. Any response from your gunsmith that is less than enthusiastic about the stock(s) you are considering should give you pause to ponder. Ask what his iisues may be so that you make a truly informed decision.
Hope this has helped. Good luck with your selection.
Scott