old colonel, if you mean what would make an improvement in the homicide-by-guns rate, none of the mooted changes would make a speck of difference. It is what it is. Google those for US, Canada and Russia, contiguous countries across the top of the world, each with different governance, different systems, different people. As the only country I know of to have introduced a long-gun registry and got rid of it with popular consent, with a handgun registry and regulations that haven't been challenged by the shooting sports fraternity since its inception 80 years ago, Canada's homicide rate is a consequence of what our citizens have chosen democratically, as they are in the US and Russia. You could no more change our "gun cultures" than change what makes our countries the homes of the best hockey players in the world: the spirit, passion and tradition of our peoples.