However for practice shooting and keeping your shooting skills up, 22lr is hard to beat.
You can buy a super accurate air rifle for under 500 and a tin of .177 pellets is very easy to find as well as being much cheaper than rimfire ammo.
This
I shoot a lot of air rifle pellets for practice and controlling European starlings, and that started before the panic a year or so ago.
That, and I bought a 22 hornet and have a good supply of lil-gun and 40 grain v maxes, z-maxes and blitz kings