I did alot of casting in the 70s & 80s. All I cast was for revolvers. The .38//357 and .44. Mostly wheelweights, which are hard to find now. I have alot of lead in ingots, but I have never made my own mix.....yet. Still go out and dig up olc backstops and cast a few hundred bullets for .38s mostly now.
I have a 40 year old Lee bottompour furnace, a few double cavity Lee & Lyman molds. I broke the handles for my Lyman molds a few years ago and only use the Lee molds right now, mostly cause I don't cast much. Got into the habit of using jacketed bullets for the magnums and only use lead for plinking lower velocity bullets, like in the 800-1000 F.P.S. range.
Also have a Lyman 450 sizer & luber with .357 & .429 dies for the .38 spl. .357 mag, and .44 mags. The sizers can be had in slightly different diameters, .001 or .002 etc. depending on your bore diameter if ya really wanna get critical for accuracy. I never did. I got by with just those 2, but not all bores are exactly the same. If your sizer is a bit small for hte bore, your accuracy will suffer. For exact bore diameter, you will have to "slug" the bore. That requires melting lead into it, which is a mess in itself. Another way would be to fire a lead bullet into water deep enough to get an undamaged bullet and run a micrometer over it to measure it. Most people don't wanna go to thatamount of trouble to bet the exact bore diameter.
I don't cast auto pistol bullets. Only reloaded .45 acp and I did not cast them. I just don't shoot enough in my old age to cast much now. So, I stick to casting mostly .38 cal for low to medium velocity plinkers. I use less powder that way too.