What I do is mount a bright string of LED lights on the frame of the press (650 in my case) right next to the toolhead and I do a visual sanity check on every charge as I'm putting a bullet on top.
The process got you. Meaning you were trying to reload at the same time as setting up(re-setting) your press. When more than one thing went wrong it was time to clear everything away and start over from the beginning to make sure it was all working right before completing a single round.
I started progressive reloading on a Load Master in Januarry and fear a double charge, only a little more than a squib.
since all machines are susceptible to glitches and hiccups.
GaryL said:I think it's pretty cool that the OP had the humility and cojones to post up his mistake, since it takes plenty of both.
This is why I stick with my single stage press, one I've used for 40 years when it was NIB. I'm not saying a thing about anyone who uses a LnL, a BFD, or whatever brand and number, this is just me. I might take a bit more time to load 60 rounds, took me an hour to reload 60 ..38 Spl's last night, so far no Kabooms! I'm glad the OP is okay, glad/hope things work out okay in the regard you get the piece fixed and up and running again. Some folks like the extra gadgets involved, I'm happy for you, I'll stay single.