That amount will bring you to around 156 ppm of nitrites, which will give you that cure like flavor. If you want it to taste more like fresh sausage you can go much lower.
I should have included the below link with my original post, but I couldn't find it this morning. If you don't have time to read the entire article, scroll down to "What Will Happen if Too Little or Too Much Cure is Added?". This site takes the information from the USDA and FDA sites. The only time I've seen them differ from the USDA is when they state you can hot smoke sausage without a cure safely at 180°F, while the USDA states the minimum low temperature is 225°F. When the USDA does not have a regulation/recommendation, such as a minimum amount of cure, they will use the standards recommended by experts and scientists in the field.
Curing