If you can get a variation fairly easily and have a number to deal with, get an FAC .22.
I rat quite regularly, 2 lads with sub 12s and me with my FAC .22. Zero need for range estimation shot placement less fussy (unless huge then a Texas heart shot really is a heart shot). A sub 12 works but an FAC works better, as in it will give you more opportunities. We have done several 100+ 3hr sessions and I always account for around 2/3rds of the bag for the above reasons.
Plus FAC air rifles secondhand are cheaper.
If a variation is is a PITA go sub 12 .22…..
Or get a moderated .410 for more fun
I have been using my moderated 12 ! Shot 200 in 4 nights on the feeders !
