When casting I usually use two or three molds at a time, casting different calibers. I usually work for about 4 hours making about 600 to 800 bullets. Some time is necessary for refilling the lead pot, fluxing, getting back to temperature, keeping the molds at the right temperature, etc. This is followed by inspection (removing culls), sizing, and lubricating. So probably about 8 hours start to finish for 500 to 700 finished bullets.
That is why I have been buying cast bullets in recent years. At $70 to $90 per thousand, delivered to my door, I'm a happy camper!
About the only things I cast now are for rifle calibers. I love shooting my old 19th Century rifles and they all need bullets that are not readily available.