Hornady 250gr GMX
Average Penetration (inches): 19.5
Average Weight Retained (grain): 247.4
Average Weight Retained (%): 98.9
Average Expansion (inches): 0.753
Note: If this was a beauty contest, the GMX would win for sure. Very impressed with this bullet. I was surprised that it expanded deeper in its hollow point than the TTSX since the TTSX is supposed to expand to lower velocity. I haven't shot any game animal with anything by Barnes bullets in over 10 years but I might have to try the GMX next year!
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Nosler 260gr Partition

Average Penetration (inches): 17.83
Average Weight Retained (grain): 207.3
Average Weight Retained (%): 79.7
Average Expansion (inches): 0.690
Note: Typical Partition performance. The top lead portions are just sitting on top of those bullets, they are no longer attached.
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