Thanks Mal,
It was 2# of freebie so I don't mind putting it on the back shelf for awhile anyway. Squib loads actually worry me about as much as over loads do.
I once ended up with a bullet stuck in my barrel from some bad reloads. I was shooting fast and just barely got my finger stopped before discharging the next round
After I try this out awhile I'd like to be confident enough in my loads to practice double taps without worry.