Any opinions on this ammo for a GLOCK 17? I can get it for 58 cents a round. Is it worth it at that price? Also, I realize it's rated as training ammo, but how effective is it at stopping an attacker if necessary?

Exactly!Price aside, yesterday I fired 100 rounds through my GLOCK 17 MOS and it was very accurate and cycled without any problems whatsoever. While I have Federal HST hollow points loaded in a few mags for self-defense this is excellent practice ammo. And, if the truth be told, I wouldn't want to be on the wrong end of the muzzle of a gun using this ammo. LOL