My suggestion is a Kelbly TMBR model. The fore end is longer and allows for more stability in the rest and bags. The fore end sides and butt are profiled in a way that makes it not as sensitive as you move your way around a Score target but it also is killer good for Group shooting. For a dedicated HV 13.5 lb. gun, that's the one I'd order if building another one. Kelbly's web site is a flippin' mess anymore...best to just call them. If you're going to go with a pillar bed rather than a glue in, they will put .250 guide holes in for the action screws and let you make and install the pillars. When they do the pillars, they're molded in as the stock is made....I've seen one come loose and that caused no end of issues for the owner before I found it.
Another good one is the Bruno/McMillan pattern, available exclusively from Bruno's Shooting Supply. The fore end is shorter but the sides are great for either Group or Score shooting.
Just my experience, for what it's worth.

-Al