I've been using the Talley lightweight 1pc alloy setups for over a decade on several of my rigs. The only time I had any trouble was when I improperly torqued the top of the rings down (got uneven and one side was touching, the other wasn't). The top of the ring cracked then (after several firings). But that wasn't the fault of Talley, it was my dumba... for not leaving proper spacing and torque on the rings. (on essentially all rings you hafta leave a gap, that assures proper "spring tension" which then holds your scope on. If you screw/stretch the rings until they touch then you aren't holding the scope properly anyway)

I recently moved a few scopes around and despite having great Warne steel rings on a Rem Custom Shop 280 (Was holding on a VXIII 4.5x14x50) I switched the scope to another rifle and put a Conquest 4.5x14x40 on the 280 and wanted a lower fit than the Warnes. The Talley 1 pc lightweight fit like a glove and based on my past experience with them, I have the utmost confidence in the system! If I remember correctly, on the LW 1pc setup Talley uses a heavier, courser thread on the rings instead of a regular machine thread. That makes that connection stronger as well!

GREAT stuff!

ps
The DNZ stuff IS great as well but DADGUM is that a big, UGLY setup! Sticks out like a big ol hairy mole on the nose of a otherwise beautiful woman!