I also have 2 550B's one set up for large primers one for small. The wife and I have loaded thousands and thousands of rounds in twenty years for cowboy action shooting. Had only one part break had the replacement in a couple of days. Can't beat Dillions customer service. By the way ( knock on wood) I have never had a squib load! It can happen if your trying to watch tv, talk on the phone, etc. When loading stick to loading.