Not getting all available evidence on a timely basis could cause a FReeper to go nuts.:O{
F,this info would put a number of handgun cartridges in our possibilities list.
The lady that had a flat and found a bullet inside the tire upon repair,weeds out some slower cartridges I think.
When a tire is spinning at hiway speeds,I don't think any of the "less powerful" handgun cartridges could penetrate.