Is 300 shots sufficient for the entire face, or do I need 600 shots or more?

This depends on the purpose. For specific areas like around the eyes or double chin, about 100 to 200 shots may be sufficient, while for overall elasticity improvement of the face, around 300 to 400 shots may be needed. If sagging is more pronounced or if you want to manage a wider area (from cheeks to jawline to neck), considering 600 shots or more may be necessary, but prioritizing a design that matches the sagging areas and degree is essential.