Adding weight to steam VR Throwable prefab

Hi so I've been playing around with Steam VR (using the HTC Vive) and I've got a cool script that allows the player to turn into a giant (by increasing the Player -parent obj that all the other VR stuff is attached to). Now the problem is that, when the player is giant and they throw an obj (with the throwable script from steam VR), the object feels super light. It has 0 resistance to anything. looks like it is being thrown on the moon. Any suggestions? Ps. it doesn't make any difference if I change the obj mass