Have used Lee loaders in several calibers ( including .303) for years with COMPLETE satisfaction.Funny thing is that cases loaded in them for my .30-30's and my .303 dont grow much at all.I have found that conventional dies , even Lee collets, cause cases to lengthen when resized.This doesn't occur with Lee Loaders.Lastly, the ammunition I've loaded in Lee Loaders is by far the most accurate I've ever shot. 303British.com has an excellent article on neck sizing cases and the Lee Loader is highly regarded.Generally less than $20 you can get several and set each up for different bullets and not have to reset the die for each.At a hundred and a half for a good press and another $30 or 40 for dies , you can get a pile of Loaders and powder,primers,and bullets for the same price.If priming scares you I'd recommend a hand primer( use 'em myself).Best of luck!