Just finished up testing the Hornady 223 75gr BTHP round (#80265) from my 1 in 7 Palmetto State Armory 14.7'' CHF 1 in 7 twist barrel. The test was shot at 15 ft, 60 degrees, and 300 ft of elevation and the Clear Ballistics FBI spec gel block was used with 4 layers of denim.
-2386fps, 948 ft/lbs energy
-Expansion/fragmentation started at the 4''
-Jacket separation occurred at 10''
-Deepest penetration point was 19''
The manufacture of the gel block, Clear Ballistics, claims their gel meets FBI specs for testing. I calibrate my gel per their specs prior to testing and use 4 layers of denim per IWBA protocol.
However, by no means am I saying this test is a substitute for the great work industry professionals like Dr. Roberts and others do. I'm just a shooter that likes to learn about the products I use.
Here's the video of the test:
Hornady TAP 223 75gr BTHP HD Video Test Link