I've got a 300 WM built on a TRG-S action in the standard stock.
The stock is a sporter style, slim fore-end, comfortable and fairly slim grip. LOP on mine is almost 14" if I recall, but mine has a few spacers installed. I figure its around 13.75" "as it comes". I like a "longish stock" and I ordered the replacement at 14.25".
I'm 6'1" tall and the stock fits pretty well. I could do with a higher comb though, but I tend to find all standard sporters are like that for me.
If you look on McM's website you'll see that they have a std. TRG-S pattern - that's pretty much how it looks. A few weeks back they also had a special on one of those stocks quite a bit cheaper than you would pay if you ordered it.
Mail me at email@example.com
and I'll send you a photograph of mine in the factory stock alongside a Rem 700 BDL.
I find the stock on the TRG-S is very flexible. The forend can be pushed against the barrel with 2 fingers and off a bipod the weight of my (#5 contour 26") barrel starts to close up the free float close to the receiver. It shoots totally different and way better for me rested on a varmint bag under the receiver.
I've already received a new stock which I haven't yet fitted. If you buy a new stock you need to order bottom metal as the factory stock has it molded in.
In short - I think it's a pretty nice sporter style stock, but way too flexible. I'm not sure how the big stuff shoots out of those std. stocks.