There was a fellow posting around here on some forum, may have been here, that used the heavy 75-80 Match bullets in his 223 for his kids. They had shot some mule deer and he took pictures of the damage. Wow! I was amazed and I am not easily "amazed". lol. My Marine SIL said even as far back as 2002, his first tour of the sandbox, their SgtMajor had procured them BlackHills 9mm HP and the 77gr OTM of some kind. Pure death and destruction he said...but Force Recon guys can shoot...very accurate and very fast, ha. I know this isn't 150TTSX, but hey, as the OP, I can "visit"....most Texans use or have used very small caliber rifles....the deer are close, for one thing and small. Plus, its fun to play with different ammo! smile