I used to ride my horse in the back woods as fart from civilization as I could manage. I packed my OD 3" M66 in my hand made copy of a Bianchi 5BHL under jacket or vest. On one occasion I had charge of 2 youngsters on small ponies when it was clear we were being stalked by coy-dogs. I didn't get much of a glimpse but the were a half dozen moving through the brush just beyond eye sight. Despite the falling temperatures, I opened my coat up to allow access... felt for the back up speedloaders in my pockets... I headed to less remote areas & the critters fell behind...
There were a few on-duty incidents but nothing that required firing a shot which was just as well with me.