Yes, I had the chance to speak with Jim Cirillo about a year before his untimely death. He was a great man, and a very personable one, and as you say, funny as can be. If you ever get a chance to talk to Pat Rogers (formerly of Gunsite, now running his own EAG Tactical training outfit), you'll find a kindred spirit there.

As a revolver shooter Jim was obviously not concerned about magazine capacity. That doesn't mean he didn't think having lots of ammo on hand was unnecessary. He did say, both in print and in person, he carried multiple revolvers on his person on stake-out squad ops. IIRC, he carried 4 revolvers as a rule. He was also very adept with a speedloader.

"I'm gonna have to science the schit out of this." Mark Watney, Sol 59, Mars