I have a Lee progressive,, nothing but trouble at first, then I went to youtube and watched all the videos on that press.. The guy the posted the videos is Sflib or something close to that..think he is loading .38s if I remember correctly. I did the detail strip of the press, lubed it like he said.. I did replace the chain with picture frame wire and a crimp fitting, then I did one function at a time.. 1st Decapped 100,
disabled the deprimer then primed 100, then dropped powder, weighing the first 3 or 4 then spot checked every 10 or so, finally started loading live rounds, measured OAL on each of the first 20, then weighed the loaded rounds, each round was within .2 of each other ( using the same brass) any that were over or under I pulled and used a bullet puller on em.
I visually check each round before dropping a bullet into the final stage. Now it runs like a champ.. couple of tips,, mount to a solid bench, and keep the primer tray more then half full and I use a thick plastic coffee straw to assist the primer feed. If you at least watch the videos that will be a big help and go slow and understand what is going on at each step.