While your external ballistics calculation is "close enough" you are mistaken in the terminal ballistics Ron. Upon impact, that bullets forward momentum is greatly reduced while the rotational speed is reduced significantly less. Here's a ballistics gel test of another type bullet. It shows what I mean. watch closely and you will see the turns in the gel clearly.

And by the way DAAAANNNNNGGGGG that little RIP bullet is a NASTY little critter too for a PD bullet!!