cam wont fit

I don't think I've ever had a set of cam bearings fit a cam perfectly the first time when everything is new. You're right to not force it in too. I use a razor blade to clearance the bearings. It needs to be free enought to rotate the cam by hand. You'll find it's usually one or two small spots that are tight. If you install the cam until it doesnt want to go any more, then rotate it, then pull it out, you can see the shiney spots where it's too tight. Scrape them down, try again... Eventually it will fit fine.