I loaded up and shot about 20 of these last weekend from my 7 1/2" Bisley. I was shooting into clay and gypsum based soil, so not really a good "how will they do on game" test. Loaded over 300-MP, they went into 1.25" at 25 yards, they really expanded, and half of them shed the jacket while the core continued on. With one exception, the cores stayed in one piece, on one, the core clipped a rock, it held together, but it was strung out like a string. I feel these would be a perfectly good bullet to use on deer.