im alittle confused when you say that you lose speed with the 650 because of the lube process? the lubing process is the same for the 650 and 550. You still have to remove the lube if you are using the 550
i have both machines and have loaded rifle on both. The 650 with casefeeder is much faster, because you are not having to take the time to pick up a piece of brass and index the shell holder
with the 650 you can pretty much just sit there and pull the handle mindlessly (while sizing)
and i have used One Shot with no problems on rifle rounds. i just put a bunch of brass into a ziplock and give a REALLY good spray, mix the bag, and spray again. With that said i prefer the dillon lube as a little goes a long way