What's the minimum arrow weight in grains per pound (GPP) of a Bear Archery Grizzly? It's a 2015 model with 35# if that matters.
Most recurves and selfbows I have shot behave best with an arrow that is close to or at 10GPP. My definition of behave though is related to performance related to hunting - I want a heavier arrow to have more kinetic energy downrange. I shoot no less than 9GPP, the lighter arrows just have to much string twang for me and makes me nervous.
I'd start with 10GPP and then work my way up or down depending on your arrow flight and penetration.