Here are some details on my efforts with Starline brass (which is, in my opinion, very good brass):
With single-loaded empty cases, the extractor would *usually* pull the brass out sufficiently for the cartridge guide to lift it and "eject" it from the action. With a fired case, or one that was a little bit "sticky," the extractor would start to pull the case out, but there was enough room in the action, with the narrow rim of the brass, for the brass to shift slightly to the right after it was partway out of the chamber, and the extractor would then slip past the rim on the left. If the rim had been slightly wider, or the extractor slightly thicker (or the opening in the receiver slightly narrower) there would not have been enough room for the extractor to pass between the wall of the receiver and the rim of the cartridge. But on my guns, there is enough room, and that's what frequently happened.
Of course the best way to figure this out is probably to buy a dozen pieces of Starline brass and try it. If it works, fine. If it doesn't, then you have the perfect excuse to buy a Spencer with a Lane extractor to go with your brass.
Merry Christmas to all, and good shooting in the New Year.
--DJ