I shot my cow this year at 550 yards. 143 ELDX going 2950fps with RL26 loaded probably too hot with my stock HMR Bergara. I'm at 3900 ft alt. It was off my deck and the temp was about 20F. I was set up on bags front and rear perfect rest. She was standing between my 500 yard gong and 600 yard gong in my alfalfa field next to my house. I waited till she was broadside and hit her right through both lungs and heart. The jacket seperated from the core and neither exited. Both pieces in the far hide. She sat back on her honches then stood back up and then folded over. She was dead when I got up to her. I had forever to wait for the perfect shot.
My new 6.5 PRC gets here Friday. For me at that distance the hit felt too soft, looked too soft. The round did what it was supposed to do I guess? But even with the perfect set up left me wanting a tad more. I wanted a exit in case I needed to track her. I like the recoil and watching the hit with the Creed but at that distance I think I was pushing it. The year before I got my cow at 150 yards with a Barnes and it felt right. The bullet didn't loose a bit of mass and mushroomed perfect. It was a boom, loud thud, knock-down flop.
In my head after I get my new PRC dialed I figure I'm going to try to use a Barnes loaded up for first shot for inside of 300 yards and something heavier grained loaded in the mag for further out. If its a long range shot I can just jack out the Barnes. I"m also playing with the 124 Hammers so theres that. With a PRC I think I can use heavier grained bullets to see how that plays out with felt recoil and how hard they hit my gongs. If I can use mono's with less grains and still pound the gongs hard I'll try those. If not I'll go heavy with the bullet grains. I don't plan to ever shoot over 700 yards at game. I can be pretty sneaky so I figure 700 is my limit at this point.
I have 8 inch gongs from 100 to 1000 yards, ten steps away from me as I type this if I walk out my sliding glass door onto my deck. I reload and use a chrony. I'm saying I wanted a touch more at 550 with the 143 ELDX. This is just my opinion with the Creed. Most elk gurus will say 30 caliber or nothing. My clan were all .270 til my GF got me into 6.5's. -WW
ps. I've never shot that far in my life. I've taken pretty much a elk a year since 1995, and just as many mule deer.