I believe STS209s feed more reliably even from a MEC progressive. I almost always load by the hundred for the obvious reasons. I don't have to watch Remington primers. I do have to watch the Winchesters or about twice per hundred they skade past the reprime well or flip over. Perhaps the taper or stepping and the radiused end of the body help the Remingtons seat easier than W209s but I've never noticed this to be the case. I also like STS hulls/Game Club/even the black hulls now that they're the only compression formed game in town.
jack
