I ran into issues with Total Seal iron rings on the last build I did here. They were so "brittle" it was NOT possible to get them on the pistons without them breaking into several pieces.
The good news is that I told them about it and they next day air shipped replacement iron rings that were fine.
I've been using their file fit Moly top, iron second ring packs for quite a few years with no issues otherwise. You MUST check the oil rings as well because I've ran into several sets that needed some material removed from them as they "butted" together in the bores.
With most ring packs even when you order file-fit the oil rings don't need anything done to them.....