My current 223 trainer barrel has 7,600 rounds on it and is still shooting sub 1/2 MOA. I've got another barrel ready to spin on but this one wont die.
XBR 8208, 23gr, 2800 fps, 26" Bartlein, Hornady 75 bthp, Dillon progressive loaded. I've shot a ton of the 75 ELD-M too and they shot great...