To my knowledge, the .357 Silvertip was only made in the 145 grain load. I have not seen any other weights.
I have fired a lot of those rounds, out of various revolvers and two carbines. The load seems to work very well, and appears spectacularly explosive out of a 24 inch barrel rifle. The biggest thing that keeps me from regularly carrying it is the annoying blast. It seems, to me, far worse than Federal, Remington, or Speer 125 grain HPs (I currently carry Speed Gold Dots).
The concussion was so great that I actually thought my beloved 5 inch 27-2 had begun to spit from the barrel/cylinder gap, as I thought I was feeling something hit my face. Fortunately, that was not the case. But with any revolver I've shot these rounds from, I can feel the concussion on my cheeks and forehead.