Well, if you control projection direction with hard edges, you mean you're not using an averaged projection mesh/cage, and that is generally a bad idea. At that point you're trading skewing artifacts for gaps in the projection/seams, which also suck. The methods in this thread are intended to show how to avoid skewing without introducing other artifacts (but generally at the cost of triangle count

Understanding averaged normals and ray projection/Who put waviness in my normal map? Of interest to most who will read this thread, I wrote an extensive tutorial that covers this topic and many other common baking issues. It's geared towards baking in Toolbag, but most of the Basics and Best Results sections apply universally. Check it out on the Marmoset site: https://www.marmoset.co/posts/toolba