I have about 3000 .223 once fired. Mixed head stamps. Some mil crimped. Can get more easily enough. I have a bunch more loaded for everything from distance to varmints.
Was looking in to a set of casts for 180gr 10mm. Just haven’t gotten around into that madness yet.
Cast bullets for utility use is very practicle. One of my bullet molds (Lee C-308-170 FP) works well in my 30-30 but can also be used in .308 and 30-06 if needed. (<$20 mold)
I reload with jacketed bullets, but it is nice to have the option on cast.
Reloading 30-30 with cast bullets, if you already have the brass, can be done for 12-15 cents per round. Pretty cheap hunting ammo. And it works well. It is not effortless. Properly sorting and melting wheel weights is a challenge today. Lots of variables, but the natural hardness of the right wheel weights is almost ideal for medium velocity cast bullets.