I used to have this trouble, particularly with Acros. The solution is to apply a hairdryer to the reel for about 30s immediately before trying to load it. Merely "dry" isn't good enough, it needs to be nuclear-blasted dry and then the film will push right into the reel without even needing to ratchet.
Well, I am absolutely sure all of mine had dry reels, even the long-taking ones. Any other ideas?