Keep in mind, it is the length of the bullet and, to a certain extent, it's shape which will determine whether or not it will work in a given twist.
+1
I have a CZ 550 American in 6.5x55 and it stabilized the 140g GK just fine. If you are able to stabilize a 130g VLD then you should have no problems stabilizing a 140g GameKing.
An inaccurate load does not mean it isn't getting stabilized, it just means it's shooting poorly in your rifle.