personally, i think it's a big mistake to allow bp residue to eat at the brass. i never deprime after shooting, no need for that, but a big need for me to get the brass into soapy water ASAP - outta the chamber, dunked in the jug. back at the ranch the brass gets dumped into a strainer and washed of the soap. now they get deprimed, then cleaned shiny bright inside and out.