I'm curious and am hoping I can get an explanation here. Some crossbows have teflon impreganated barrels like Darton and Desert Stryker while other models like Parker have teflon slides on top of the arrow tracks. I noticed that Ten Points and Barnetts and Horton don't seem to have this particular feature. Why is that. Also, what is the best type of rail lube to use. My friend uses a teflon spray rather than rail lube. Is this a viable substitute?

When I looked at the Ten Points a few days ago I noticed that therewas no teflon on the rail and no mention of it in the literature that I was reading. In fact, it seemed that the barrel and the rail were all one solid piece, unlike the Darton xbows I've looked at. I saw the section on rail lube and began wondering. Is having the teflon a definite advantage over NOT having it or is it just a gimmick?