There are no commercially available non-tox loads in 2 1/2" to my knowledge - so, no migratory bird hunts with this gun unless you load your own. That could be tricky, too. Bismuth is no longer available in bulk, tungsten matrix never was, which leaves only "Nice Shot", which is only now becoming available.
If you're not a reloader, contact your nearest Kent Cartridge dealer and see if you can get your hands on some Gamebore Pure Gold in 2 1/2 ", 12 ga. (these are low pressure loads, designed for these classics, but only the 12 ga version are low pressure). With these, you've got yourself a fine upland bird gun.