I did in fact misrememberize (!) a few things. The author of the 2002 Gun Digest article mentioned FMJ bullets, but did not test them. He was only able to get a round to go off in a magazine by hitting one with a "firing pin" in a test rig. And only that one round would ignite; there was never a "chain fire" of all the rounds in the magazine. The single fired case would split, and that was the end of the action. No burst magazine tube and very little burned powder.
Like that author, I will not recommend that people ignore the conventional wisdom against loading pointy bullets in a tubular magazine. But I think I can agree with him that damage to the gun is extremely unlikely, even if you do.
(I also re-discovered a very "Special" article on page 18 of that edition, LOL!)
