I also prefer single stage for 410.
Tip: When loading on a single stage MEC 410 (mine is a Sizemaster), after seating the wad lift the handle up until the handle is about parallel with the floor before throwing the shot.
This all but eliminates shot bridging in the drop tube. I am embarrassed to admit how long it took me to figure that technique out.
Also, the Sizemaster benefits from collet adjustment so your shells are resized the minimum you need to chamber. The collet cycles 6 times for each loaded shell and is the most expensive part of the loader. The 410 collet is prone to failure even more so than the larger gauges. Short of disconnecting the damn thing after sizing a batch of shells, this is the best way to get a reasonable service life out of it.
MEC makes a good machine, even if not the most robust things in the world. At least parts are available and the design is simple enough that most guys can keep them running.
