Hi mines new to same troubles you are having dripping is coursed by slag getting into nozzle so flux melt as said by other post but to actualy stop it dripping is to rock filler neck bar side to side you have a slot at top of bar use a large screw driver don't bang bar in just rock side to side till it stops dripping I do 454 balls pouring at between temp 6-7 so 6.5 is about right yes my lead looks red hot to I wish you well don't for get to get mould hot and make sure you have smoked it
Ex Royal Navy Retired have fun while it lasts."I Do"
B.S.A.R Member