Isn't the .22 magnum a rimfire? How'd he pull the bullets to reload the 60 grain Hornady's and how did he crimp the bullets in place once he did? To my knowledge nobody makes a shellholder small enough to fit the rim so it's very difficult to use a collet type puller and an impact puller used with rimfire would probably be WAY too noisy. I've pulled a few .22 rimfire bullets for use in .223 subsonic loads, but it involved a collet puller and inserting the whole .22 shell through the depriming hole in a .308 shellholder, it was WAY too much of a pain to ever make a habit of it.
Sorry to ask so many questions, but you started me thinking, a .22 magnum barrel in a 1/7" twist would be awesome for suppressed shooting if loaded with 90 to 100 grain bullets. Even the .22 Hornet really has too much case capacity for good ballistic uniformity at subsonic velocities but that .22 mag case would be perfect!
I noticed that you, like me, are from Texas, I'm pretty sure that a little bird once told me that its been illegal to hunt deer in Texas with a rimfire for over 60 years.
If you think it proper, feel free to reply via PM, I don't want to totally hijack the OP's thread.