I've been using a (insert whatever here, in this case it's a 20 lb Lyman 20yrs old).
On occasion I would have to take the paper clip held by pliers and clean out the nozzle.
THIS time I must have done a better job than EVER before because the flow greatly increased. So much so that the bullets that I'd worked up for (insert your favorite, in this case it was using a 215gr 41mag mould for .405 Winchester target loads) cast VERY differently.
My point is this. I would like to see a lead pot made with a removeable nozzle, with inserts of various sizes, so that it could be tailored to little .22 bullets and big .458 bullets.
I think that one of the benefits to dipping by hand is that one (knowingly or not) can regulate the rate of flow to match the volume of the cavity.