550's are great if you need a progressive in a number of caliber's, otherwise save the cash for a 1050. I'm new to this forum, but am well known to other NFA(or machine gun) forums. After loading on the 550 for 2hrs+ a week, now I load for 1.5hrs on the 1050 a week and can mostly keep the MG's fed. Just don't set up a 1050 in 3 or more calibers and you'll be a happy camper.