Sounds like a bullet and not a cartridge issue. No?
I think the cartridge has been used effectively on deer sized game by many here. Enough so as to prove it?s an adequate round within its ?scope of authority ?.
Hope you have better luck with your new bullet choices.
I do put the blame on bullet choice. Maybe my thoughts were wrong about 158 gr HP bullets being the best choice in a revolver at that velocity. I have read many people got great results with that weight bullet although not that brand. It also seems to me 180 gr jacketed would work better in a 357 Maximum or 10" contenders with higher velocities. I do not know how to post a picture but, I do have one after skinning. I just wanted to share these results and maybe save someone else the grief.