I've never had a Sierra bullet shed it's jacket, and I've never had a deer complain about me shooting it with a Sierra. Never had a deer run far since I stoped using 00 buckshot many years ago. And I've never had a Sierra tech try to push their products on me when I asked them about another brand bullet. To the contrary I was told that the Speer 70 grn .224 bullet was the best on the market if I was to use them on whitetails. You guys must use a different Tech line than I do. And if you didn't try to get 3500 fps from all your bullets they wouldn't blow up and shed jackets so bad .By the way the bullets in the infamous comparison test was sierra 165 gk, speer trophy bonded 165gr, hornady 165gr interbond, swift 165gr scirroco ,and nosler 180 gr accubond. I think if the test was rigged or flawed in any way they would have been sewed many times by now,it's just to easy to duplicate. The test was done at 308 win volicities,not 30-378