Jon was into sports cars from young adulthood, including doing some racing.

As I noted ealier in this thread, "performance" cars aren't an unusual addiction for rifle loonies, but they obviously don't use them for hunting. (Though Jon might have been shooting groundhogs, as they're known in the East, from the roof of his Lamborghini.) I know of a couple other well-known gun writers who're into sports cars, along with several non-writer rifle loonies, and one really well-known gun writer is really still into American "muscle cars," though I believe he's also in his 70's now. Brad O'Connor, Jack O'Connor's son, really likes fast Italian cars. In fact he drove one from his home near Seattle to his last prairie dog shoot in Montana, though once he rode into the PD country with friends in their pickups.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck