@wolfe: Let's see. The selection criteria are: walnut or synthetic stock, 24 inch or longer heavy barrel, MOA accuracy, no after markets, and 700$ limit.
There are rifles available which meet the mechanical specifications but exceed the budget. I think your best bet may be a savage, but with that dollar figure, the savage stock will be lower quality and not the accu-stock. Nemesis also had a good suggestion. You may be able to get a remington 700 with a less expensive matte finish and stock. The market also seems to be presently flooded with "tactical" type .223's, but most of them have 20 inch barrels.
Even though you said "no" on the aftermarket stock, you could get an inexpensive savage and drop it in a sporter style, boyd's stock, which is offered in solid walnut (about 114$). You would just have to open up the barrel channel a bit.
I'm not sure remington still makes them, but a really good option was a remington 700, with a 5-R mil-spec barrel. If I recall correctly, they had a 24 inch heavy barrel and a bell & carlson fiberglass stock. But that would likely be over budget.