Loadedround,
Was that supposed to be directed at Spencerhut? He was the one suggesting getting the "optional" blast shield for Dillon or Hornady progressives.
I'm like you; a tube feeder like that on the 1050, 550, or LNL AP is just as safe or safer than APS strips, since the primer being seated is much farther away from other primers than with the APS, or the 650 tube system for that matter. Most of the tube detonations I have seen/heard of have been 650's, since the wheel that transfers primers from the tube to the priming station has several in it at a time, giving a "chain reaction" path from the priming station to the tube.
Except for the 650 (because of the primer feeding mechanism), most progressives can be used turret style while learning, one round/step at a time. Dillon even has (had?) the AT500, a stripped down 550 designed to be used as a turret press, that can be upgraded to a full-up 550.
That said, a single stage press, even a hand press, is still very handy to have in addition to a progressive press.
Andy