I can only report to you my experience. I had the mag out, put the pistol down on my bench next to the magnet, and the two stuck together on the grip frame. Was the magnet a strong magnet? You betcha. It was strong enough help get grip screws out from behind my bench if I could get it anywhere near them.
If the frame was non-ferrous could it have been attracted to some steel internal part? Never thought of it and haven’t a clue at this point in time. Could be. Or it could be Schlemeier was misinformed. Or something else.
The only thing I’m sure of is I had to pull the magnet off the frame.
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