Macarons not rising fully?

Hello! I’m following Claire Saffitz NYT chocolate macaron recipe, minus the cocoa powder, and it seems like my macarons are well mixed and getting feet but not rising as much as I’d like? Is this an issue of oven temp, or does this look like a macaronage issue? I feel like I’m this close to perfect shells :’)

I’m baking them for 17-20m at 300F.