I have a Star Modelo Super chambered in 9mm Bergmann-Bayard (9mm Largo), and I stoke it with Silvertips when its rotation as house gun comes up. It's as accurate as my Model 10s, and shows no evidence of excessive anything on the recovered brass. The ST 125gr HP consistently outshoots the 130gr FMJ, either W-W or R-P, at least in my pistol. I would be quite confident w/this load in a SD situation.
After some initial "plunk tests", I found that the STs would headspace on the mouth, but would kind of "wedge" in the chamber without the relief in the barrel hood. After cutting a very minor relief, I expected the cartridge to go deep, but found that it stopped just flush w/the hood, just as the Blazer and Spanish milsurp Largos do. Big-fun pistol, and reliable enough for defense.
Larry