I had never used a 223 to take big game before and was not a fan of trying it. I am not a big fan of Barnes bullets, had horrific results with the original X bullets!!!!!!
Last fall I had a Mule Deer hunt where the DNR begged me to use mono bullets to save the F'n Condors. didn't want to use one of my custom barreled rifles with the vile Barnes so I used my 223 with the 62gr TTSX................One shot and was obvious it was dead before it hit the ground, worked much better than I expected.