Okay I am too lazy to do a search! So far I have been real happy with the woodsman Pro from bailey's on my Solo. But recently I Acquired a 4620 aka 295 Poulan It came with Oregon 33 safety chain you cant bore cut with that stuff and it seemed really slow My 2550 with Low pro Woodsman chain will out cut it! Maybe I answered my own ? But I am looking for different opinions here.