You have to search for your townships "firearm discharge by-law".
There will be a whole bunch of info with regards to where you can shoot, and also what the max. calibre is for that township. They are all different, so make sure you know what township your going to shoot in, and make sure your not over calibre.
Generally, if your only shooting targets, there is no restrictions. The restrictions come in place for hunting purposes only.
MAKE SURE YOU CHECK FOR YOURSELF. This is only a guidline to get you going in the right direction!!! Print a copy and carry it with you. Most of the cops don't know the township by laws as well as you might think. I carry it with me a lot if I'm hunting in a rural area, and it has saved me some grief a few times already with cops who had no idea I could shoot where I was.
S.