Thank you for your response!
What I was trying to do was run a command such as:
Manager.ActiveBrowser.Find.ByContent<HtmlH3>("p:Some Content");
Which would return only h3 elements that matched the content expression.
Basically my project that I am working on testing is big and I was trying to avoid having to add the Find.ByExpression("tagname=h3") for every h3 that I needed to retrieve.