There are likely many factors that lead to the high incidence of violence and homicides in the US, of which loose gun laws may or may not be a factor.
My question is not whether stricter gun laws would reduce incidences of violence, but whether stricter gun laws would reduce casualties.
There is some anecdotal evidence: a stabbing that happened in China just last week resulted in 24 victims, none of whom died -- a result that would be unthinkable had the attempted murderer been carrying a gun. Although the answer should seem to be obvious, it isn't particularly empirical.
So, are there statistics on the number of casualties per violent incident involving and not involving guns (preferably of different kinds -- handguns, hunting rifles, semi-automatics etc.), or in countries with and without strict gun laws?