I had one. It was very handy to carry while hunting the thick stuff, and packed a surprising punch. Don't sell a .44 Mag rifle short when loaded with a heavy cast bullet.
I had changed sear and spring, then shimmed the bolt. With the load I was shooting, I could count on 1.5 to 2 inch groups at 100 yards. That would've been a long shot in the terrain I hunted with it.
L'il gun and a 300 grain Beartooth WFN at just under 1600 fps shot through every deer I shot with it, from any angle.
Recoil was surprisingly stout, looking at the little rifle and cartridge.
That rifle falls into the group of "Just why in hell did I sell it?".