.38SPL 148 vs 158?

I see most shooters, especially S&W Model 52's, are using 148g HBWC bullets.
Zero has 148 g and a 158 g HBWC available. 
Looking for opinions/experiments on the heavier head. Must be longer, higher pressures?

Haven't seen those before, would Use more case volume so higher pressures. M52 is unsupported, danger will robinson!

I think that there may be a slip up in communication.
Roze Distributing (Zero outlet) doesn't show 158 hbwc
I think the op may be confusing hbwc & swc in the same sentence.

feel free to correct me
steve

Oops! You're correct Steve! I have been misled! The 158g are indeed SWC.
Thanks for the correction!