I have been using the Barnes mono's since 1994 on elk & they have never failed me. 6.5x308 wildcat , 260 Rem, 6.5x55, 6.5x06 & 264 mag. Always the 120gr weight & has put elk down decisively every season. Last year using a newly re-barreled 264 mag that for some reason would not shoot the Barnes accurately. I then tried the Hammer 6.5 121gr & accuracy was at 1/2" . At about 80 yds took a very mature elk with a complete pass thru of both front shoulders. The result was a DRT. So both Barnes & Hammer have work flawlessly for me. Only one elk for the Hammer by me but see no reason why they should not continue to work. Blood shot meat was almost non existent. The mono's have proven over & over again to me how they hold together even on extremely close shots.