The boy took these two critters this year with a 6.8 garage build. He just took the 3x3 this past weekend.
Ammo was Hornady 120gr SST for both. I've always had great luck with Hornady and wanted to give their 120SST a try.
Antelope was shot around 200 yards and was a complete pass through as expected. I found no fragments but she dropped like a rock in a plume of dust, so I'm guessing the spine was damaged by fragments but I found zero evidence of that. The lungs were mush.
The muley was hit at probably a little under 150 yards and the heart was destroyed and the the bullet did fragment. 2 pieces lodged right under the skin on the opposite side, it didn't have enough juice to exit. I'd guess less than half the bullet weight was retained in the two recovered fragments, but I didn't care enough to actually weigh them. This was definitely more fragmentation that I expected on a chest/rib shot and not penetrating was disappointing. He only took two hops and went down, no tracking at all which is always nice. There was a big bloodshot area on the ribcage on the opposite side of the entry wound. I should have taken pics but the bloodshot area was maybe 12" long by 6" high. Weird wound, usually the bloodshot area is just around the exit hole.
The boy likes hunting with the AR platform but I'm not thrilled the 120SST couldn't penetrate and did alot of internal damage. I'm thinking Barnes or ProHunters for next year.