Iron Jim,
Here is what I use.
405 hollow base Lee mold or 457193 Lyman 415 gr. Large lube grooves.
25:1 lead tin
459 size, Lee shot unsized
Lube with SPG, vigilante lube, Emmett, bee wax/oliver oil - no smokeless lube.
Unsized cases so the bullets dropped in.
65-68 gr 2F, depends on the case capacity, RP, Win
Card wad - tablet backing or Walter‘s wads. No card wad on the hollow base. In the early days, I would shoot the hollow base with cards wad, and they seem to do OK.
Compression die. 0.15”- .20”
Seat the bullet- drop in.
Slight crimp.
Blow tube I just use a half inch fuel line cut at an angle for inserting in the breach.
3-4 deep breaths. The air deep in the lungs has 100% humidity. The air in the airway is not. Deep breaths.
Remove Condensation from the tube. I like the fuel line because it wraps around let the leg nice.
Uriah