waveslayer, If bullet is not listed you are limited to using the BC calculator only as there is no doppler data for the bullet available. Stuff below applies directly only if you are using the free Hornady iPhone app. but I suspect other existing versions of calculator will work similarly.
I was able to save a new "Favorite" profile using a bullet I made up that was not available on Hornady's list. Here is what I did:
1. Opened iPhone app
2. Selected "Standard Ballistics Calculator"
3. Selected "Favorites"
4. Made sure "BC Calculator" was selected (lettering displayed on red background)
5. Tapped "+" sign in upper right corner
6. Provided Title, Rifle, and Optics info, and expanded "Bullet/Ammo" menu by tapping field
7. On Select Bullet screen, tapped "Enter BC Value" under the "Don't see your bullet listed?" line
8. On newly displayed dialog screen, enter Bullet Name, Weight, BC, select drag function, and hit "Set'"
9. This returns you to the "Add Favorite" screen. Finish entering load and rifle info, select I/O options and choose Results Units
10. Hit "SAVE" on upper right hand of screen, this will save the data along with the bullet info you provided
You will now be able to reload the saved Favorite by tapping it to bring up a selection menu that allows you "Select, Edit, Clone, or Delete" the entry. If you choose "Select" the saved rifle/bullet data you entered will be loaded for use on the BC Calculator.
Hopefully this is what you were asking clarification for.
If not, simply ignore it!