Hunting regs in Oregon don't allow you to hunt with a weapon that has a magazine that can hold more than *five* rounds. Which means that you have to install a "blocker" in a .22 rifle that has a tube magazine if you want to go squirrel hunting with it.

There *may* be exceptions for "varmints".

This is why I have a 5 round magazine that can be swapped in for the 10 round on my SKS. Given that the magazine on an SKS is only swappable with tools (at least the standard 10 round and the optional 5 round) this makes sure I can't get in trouble.