I have a fairly thick beard but I love the thinner grinds and have no problem getting nice shaves from them. The reason for liking the the thinners grinds is the sound feedback I get as they plow it down. I have a TI that just sings to me with each pass. I also have a wedge that that is just as efficient in beard removal but it's so quiet. Very much like an SBD fart.
Usually thicker grinds
What makes a razor particularly good for heavy beards?
One that is properly honed.
Thats it.
I couldn't agree more.+1
Especially for beginners. Heavy grind and/or hard steel are the optimum choices. After becoming proficient one will be able to shave with any type of grind.