This is from 2004 so it may be somewhat outdated. It's also a wikipedia article, so take it with a grain of salt. I would imagine that this info can be verified though:
California is listed as the 4th worst state for number of homicides committed with firearms. That would be the state that was graded as #1 overall in strictness of gun legislation.
Connecticut is listed as the 13th best
state for number of homicides committed with firearms. That would be the state that was graded as #5 overall in strictness of gun legislation.
Why the disparity? Because the statistics you've presented in this thread aren't relevant. Look what happens when you examine the relevant statistic:
California is ranked 4th worst in firearms homicides in the nation. California is ranked 8th worst in homicides in the nation.
Connecticut is ranked 13th best
in firearms homicides in the nation. Connecticut is ranked 14th best
in homicides in the nation.
So, taking in those statistics, it would seem that there are states in our nation that are more deadly to live in than others, and that gun legislation has little to no effect on that. Of course that is only comparing two states. Perhaps if you were to examine more data you would see a different pattern? Go state by state and compare the homicide rate to the firearms homicide rate.