I may have spoke too soon...
Although I didn't have to start from scratch and reload the entire app, as I was playing around with all the various gun/ammunition profiles I discovered that when I tried to get a solution for certain profiles, the app would simply quit/crash and go to my home screen.
Every time. If I clicked a load, it would bottom out and crash.
For those specific rifle/ammo combinations, when I recreated them it seemed to now work fine.
I mention it only so that someone doesn't think that just because it works for one of their profiles it will work for all of them without some re-entry of data. It was a lot easier and less frustrating re-entering the info sitting at my desk rather than out at the range laying on my belly in the sun.