I looked through my pictures and as far as I can tell it looks like the Beans and the Bull rifles were all rounded, as is the Bogle and the two Matt Gillespies. There is one NC rifle that seems to have had a V-shaped forend, but I can't tell which one exactly. The John Bull pistol has some deep moldings which end up making the forend kinda V-shaped, too, I think.
Hard to tell from my fuzzy pictures, but that's what I've got.