Before I switched to magnum calibres, I used a .270 or a .30-06, and in both I used Winchester Silvertips....THE ORIGINALS. The 270 I used 130 gr, and I never had a problem once with them...even punching through both shoulders. The original Winchester Silvertip is what you'd call a CONTROLLED EXPANSION bullet. The very few that didn't go all the way through, we found during butchering and they were perfect mushroom shape. This told me that we had very near to or 100% bullet retention, and for knockdown power....THAT is what you want.