I never thought about the primers being an issue with a vacuum - I was going to vacuum me rug under the bench where I reload today - maybe I will take it out and shake it.
Don't use a cheap vacuum that pulls the dirt through the motor to the bag. Even my shop vac pulls the dirt into the bag before it gets to the motor. House vacuum is a rainbow, so primer go into the water tank and nothing goes bang.
1) Bent de-capping pins
2) Stuck a couple of cases bad in the dies when I was first starting
3) Did not size a group of brass for my 300 WM and could not close the bolt on them after I loaded them.
Bent a few pins myself, mostly my fault not recognizing mil brass when I started. Stuck cases just go with starting out, or being cheap (more my style when starting). Had this occur once or twice, although I was sure that I had resized the entire batch. Turns out the problem was something else.
But how in the heck do you drive a de-capping pin through your finger tip?!?!?!
No idea, never moved that fast during reloading, but I am sure that it is easy to do with that much compound leverage on the avg press.
Worst for me is the crushed/inverted primer but no bang. Worst reloaded round problem? I loaded a bunch of '06 rounds for hunting. Same load as before, same cases as before. I chambered a round, shot a cow moose. Tracked her down, fired another round to drop her, automatically cycled the bolt only to find I could not close it, couldn't open it either.
Had to go home at the end of the day and drive it out with a dowel. Couldn't figure it out. Tried other rounds from that batch of 50, 3 failed to cycle closed. Took some measurements, necks had sprung back. I then remembered that a couple of times I had noticed less neck tension on a couple of bullets, with on falling right in (I threw that one out but continued on). I explained my woes to a more experienced reloader and, right off he says, "You gotta anneal that lot of brass". Then he taught me how to anneal and to cycle ALL of my hunting reloads through the action BEFORE leaving the house. That let's you cull your little errors before they cost you an animal. Only once did I find a batch that did that again, but it was in my basement, with no adrenalin, so no cost. I pulled those rounds, dumped the powder back, tossed the brass into a bag for annealing. Once that season was done, remaining bullets got pulled and the entire batch got put in the same bag and then tossed into a bucket for mass annealing down the road. I usually hold an annealing session every couple of years now.
(H110 
Pull the bullets, punch the primers, go to bed. I'll deal with it tomorrow.
