Orney, Those knee-jerk 'over the top' gun laws they introduced after that 'recessive' stole an Armalite & blastered 30 people away in Tasmania, have made buggerall difference to gun crime rates in Australia (see it just doesnt happen in the US, it happens elseware to, but useally about every 5 years, rather than on some lunar month shedule).
You have to remember there's only about 80 firEARM DEATHS A YEAR IN Oz (going by some chart I saw in the Australian Sporting Shooters Association website a while ago) so its hard to work out any short term effects as even if just one armed holdup went wrong it could mean a 5% change in the annual figures.
Even long term I don't think those laws would make more than a buggerall effect on firearm related crimes, because as everyone knows criminals don't comply with laws (even though most criminals don't have guns anyway). However as far as accidents & compulsive/impulsives acts are concerned there may be a small downward trend. You'll have to get back to me in about 20 years & I'll let you know

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I Personally think those laws went way over the top, they basically banned all semi-automatic rifles & all 'repeat firing' shotties (pumpies & semi-autos). Gez, they even went & banned, bloody .22 rimfire semi-autos, even though just about every cocky (what farmers are called down under) on the land owns one. At least the govt was paying above the odds for all weapons handed in, I got $200 for a old SKS I inherited. Personally I think it was a huge waste of tax payers money - the govt buying about a million firearms then just smelting them down.