Just for general info I have been using a 6.5x308 wildcat ( now known as the 260 Rem ) since 1994 using the Barnes 120gr mono @ 3004 fps. This rifle has taken several elk & has never failed me. Also the 6.5x06, 6.5x55 & 264 mag. at higher velocities. Using the Barnes mono they have all taken elk cleanly for me. The mono bullets penetrate well & have never let me down. . If you properly place them they will perform. I have used larger cal's with heavier bullets which have also preformed but prefer the lighter recoil of the 6.5's. This past season I took my elk with a Hammer 6.5 121gr mono because that particular rifle would not shoot the Barnes accurately. Took the elk at about 80 yds with a complete penetration thru the front shoulders. Blood shot meat , almost nothing. A plus when using the copper mono's. As always a proper bullet for the intended game properly placed.