The article in Gun Digest mentioned above, was a test performed on a Marlin tube mag. The author, filled the tube mag with pointed bullets, and detonated the back cartridge. The result?
Brass being unsuported, the back cartridge burst, and as a result, it did not burn all of it's powder. The pointed bullets ahead of it were seated deeper in their cases. No damage to the tube. He repeated the tests several times, and was unable to damage the tube mag.
He then took the bullets to a vise, and proceeded to try and detonate a primer by driving a pointed bullet on to it with a hammer. NO LUCK! He mashed the bullet points on the primer that's all.
He did not test FMJ bullets, but said he suspected they would detonate.
The Henry Mag mentioned above is weaker, due to the split for the follower.
I'm guessing the bullets were FMJ.
However, even given the above, I will pass by the line waiting to try it, thank you very much!