He passed away 8/11/2024
I came across his articles in Precision Shooting magazine in the 90's. He introduced rimfire barrel tuners there in 1994.
@tonykharper has posted a series of reminiscence threads on forum.accurateshooter.com, hopefully he will cross post them here or I will link them with his say so.
Know there is some bad blood between these forums, and tuners are a controversial topic for many. But there is no denying the impact Bill Calfee and tuners had on the Rimfire Benchrest world.