I use Herter's shells in 12, 16, and 20 with complete reliability and satisfaction in 'most' guns.
That said, steel headed shells of EU origin can and do have rims that are on the small side of specification. Older guns with chambers near maximum may not be compatible.
Steel has less rebound, and can indeed be a tad 'sticky'.
I do appreciate the low cost factory shells from Herter's, Rio, Estate, etc.
Activ taught us years ago that no metallic rim is necessary on a shotshell, just a steel ring contained in the plastic to give the extractor something firm to grab on to. The market rejected it.
