After spending a good bit of time reading and re-reading the fantastic work by Glen Fryxell and Robert Applegate (From Ingot to Target) I've come to realize how much I didn't know about boolit casting! I love to learn so this is a good thing.
With my indulgence of a new Lyman Mag 25 furnace I've been happily casting the best boolits of my life over the last few days. In fact I reached into the ammo can last night to refill the furnace and realized I'll have to make a trip to the storage unit to resupply; I probably had 100 lbs in the can so I've been having fun
On to my questions: When casting do you put the sprue back into the pot? I've been doing this since the Lyman furnace is so nice and powerful and that thermostat is accurate so I can keep an eye on when I'm cooling the mix too much.
If you do put cat litter on the top for insulation do you remove it periodically to flux? Do you flux halfway through a pot?
Looking forward to the input.