Certainly within it's magnetic field, right? I think you're reaching.....
Actually, I shot a Level II match this weekend where I was NOT allowed to use my magnet on a stage because stage description said magazines had to be placed "in" pouches.
RM ruling? Real RM? Did the WSB specifically say "may not use magnet mag pouches?" What would they have done with a competitor running only magnet mag pouches?
The Stage was one where the gun was loaded on a table, all magazines to be used on the stage must start on the table, after start magazines can be placed in carriers. Many shooters grabbed mags and stuck in their pouches. At lunch I was told by someone who had to reshoot the stage because he used his magnet that it wasnt being allowed on the stage, so since I wanted to use mine on that stage also I made a point to ask the RO on the walkthrough and he said if I used it I would get a procedural. The WSB did not say anything about magnets, just that magazines had to be "in" carriers. I Didn't take it up with the RM.