according the incubator manual, the supplied rails on the 6300 turner will work for pheasant (1st page bottom left chart http://www.miller-mfg.com/media/document/1/incubatoraccessoryinstructions_english.pdf). i use mine with bantam cochin eggs which look similar in size to pheasant. as long as they would not fall through the hole or sit too deep in the cup, i would think they would be fine.