I too have been having trouble with S&B ammo with a recently purchased hard chrome P32. Failure to feed once in a while. I haven't had a hiccup with the blued P32 I bought previous to that. Blazers are causing a few problems with this new P32 also. (Go figure)
Does it need breaking in? Silvertips seem to work fine.
The 73gr. S&B FMJ has worked pretty good in my P-32. I have shot 150 rounds of S&B threw it with zero FTF or FTE. Twice it did cause the slide to lock back, before the magazine was empty. But thats was easy to fix.
Now UMC ammo does cause lots of problems in my P-32.