Nit check-calls pairing turn, barrel river?

[Carroters]

Is this nit ever calling any of that [Kx AA etc.] range to an overbet here? If we make it like 15 we probably fold out his entire range a huge amount of the time. 15 needs to work 60% of the time, this seems pretty damn achievable. I'd bet 15. It makes little sense for Jx to bet 15, but who cares if he's just a nit who never wants to call 15 with his capped range.