HAHA
lets do it by homicide rates then. Not all gun deaths.
30K+ gun related deaths per year of which typically 2/3rds are suicides. so around 20K suicides per year.
Of the remaining, the homicides, most are gang related deaths by around 5-8K depending upon the year. Then of that the next majority is domestic disputes that turn violent and end with a gun death. Which typically means 1K or less are related to other things which run the gambit of accidents, cop killings, self defense shoots, and mass murders.
Without an outright gun ban, no gun law is ever going to stop the largest percentage of gun related deaths in this country: suicides. Even a gun ban isn't going to stop the second largest percentage of gun deaths: gang violence. Guns laws may or may not have some varying degrees of effect on the rest of the gun related deaths in this country. Mostly not though.
So that scorecard website you listed is so bad for info without knowing what it is actually trying to represent.
When you take out suicides only California gun control laws don't exactly make it any better than any other state when it comes to preventing homicides.
Try reading this to get a clearer understanding.
http://www.factcheck.org/2015/10/gun-laws-deaths-and-crimes/