Here's a couple of bad reviews for the PT Gold. These are from the Savage smokeless crowd. So, maybe pushing the bullet too hard is the problem.
"I do not know if it was a bad shot on my part but Saturday evening I knocked a big doe down,then she got up and took off.There was very little blood and we lost her.260 grain pt gold 42.5imr4759 rcr distance 57 yards.This is a very accurate load on paper but i am going to try and use something else for hunting"
Another one.
"first bullet i used in my ML. 43grs 4759. HPH 12 win 209. very accurate like MOA. first and last deer i took with them was broad side at 40 yds. it was like a bomb went off on the side of her chest. 12"+ entrance wound with little pentration only fragments into the onside lung. she died anyway but bullet preformance was poor at best. this bullet is WAY too soft for Savage guns. might be OK of BP or Subs but not smokeless."