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[Byron]

I tested Winchester SXT 130 grain HP and Speer 135 grain HP Gold Dot from my S&W 642 yesterday. I fired down into a 55 gallon drum full of water. Three Gold Dots expanded to mid 50 caliber and one to about 40. There was only a few grains loss of weight. The Winchester two rounds both expanded to mid 50's with one shedding its jacket. Both only lost a few grains of weight. I fired two Remington UMC 125 grain +P HP's. Expanion was in the mid 40 caliber with no loss of weight. Byron