How to Get More Projection from Breast Implants?

You already have a large implant. You could always get a more projecting implant e.g allergan style 45. However, this might not be what you need. Once you choose a higher profile ,your implant diameter gets narrower.
Your goals must be well communicated with a board certified plastic surgeon in your area. An honest professional advice will balance between your goals and the safety of this procedure. Best of luck!

A 500cc High Profile Saline will PROJECT MORE than a 500cc High Profile Silicone implant. More specifically you will want the end of the volume range to be 500cc. This gets confusing but you really need something in the range of a 400cc High Profile Saline implant that can be filled to 500cc at the end of its recommended fill range. These vary slightly among the manufacturers so it is important to discuss it with your surgeon. Of course, you will be trading off the benefits of the silicone implants if you exchange the implants. Furthermore the increased projection will come at the cost of the width and may mean that you have less cleavage or outer fullness.

Breast implants help to project breast tissue forward and increase the overall volume of the breast.

They are also used to help "fill out" breast volume that has been lost from having children (regardless of whether you have breastfed or not!) or following weight loss.

However, implants often do not address all of a woman's goals on their own.

If the aim is to achieve greater projection in addition to greater volume, a breast lift (mastopexy) may also be required.

For many women, it is necessary to "redrape the crepe" of loose, baggy skin around the augmented breast.

A Board-Certified Plastic Surgeon with a great deal of experience in breast augmentation and lifts can help evaluate your specific situation and guide you in the best option to achieve your goals.