Savage110, Wow I didn't know I was in the professional long range hunting section. I do have a lot to learn about hunting and the best way to do that is ask questions. You would suggest that I should feel stupid and unworthy of asking a question in you forum. Your right that I have never shot an elk and have only been elk hunting once. We don't have a lot of elk in MN and in my line of work I don't get nearly as much time to hunt in the fall as I would like. When comparing the .300WSM and the creedmoor I don't feel it is as cut and dry as you would lead on. Lets just throw out there that we are taking a 1000 yard shot. One could argue that the 150 gr round at 3300 fps and a b.c. of .437 is just as good as the 180 gr at 3010 fps with a b.c. of .527 for the .300. The 150gr gives up a little energy but gains flatter trajectory. I used factory Winchester xp3 load data for the .300 WSM bullets. Then lets use the data that I provided in my OP. A 140 gr bullet going 2700 fps. and a .612 b.c. At 1000 yards the energy of the .300 with the 150 gr is at 687 ft lb at 1436 fps and the creedmoor with the 140 gr is at 660 ft lb's.at 1457 fps. That looks like a wash to me. Keep in mind that this is a mild load for the creedmoor. I could sacrifice a little accuracy and work up a load close if not at 2900 fps and still be under a moa. then the creedmoor would pass the .300 in fps and energy at a little over 700 yards. If you look at the numbers one could argue that the longer the shoot the better the creedmoor would be or at least just as good. So I don't feel it was a dumb question and as far as I know I asked it in the right section too.
First question... did you read the rest of my post?
Next... did you really want advise or did you just want folks to say, yeah go ahead and hunt elk with your CM?
Next.... this isn't the "professional long range site", it's the Long Range Hunting site.
My intent was not to make you feel stupid. It was to clarify the purpose of this forum. Like I said... no offense... if you take offense that's your problem.
There is no way on Earth you are going to compare a 6.5 Creedmoor to a 300 WSM. You are picking and choosing your bullets to draw twisted conclusions. In my 300 WSM, with a 24" barrel, I can get 2930 with RL17 and a 210 Berger with a BC of .631 and probably the same MV with a 215 with a BC of .696 With H4350 I can get 2750. The 210 and 215 are 50% larger than the 6.5 140 bullet with a higher BC and a higher velocity. You do the math. There is no comparison.
If you have taken the time to read posts in these forums from elk hunters who live in elk country you will see that the vast majority of them prefer 300 and 338 mags for Long Range Elk Hunting. There's a reason for that. Like I said, I have a friend who hunts elk with a 243, but not at Long Range and it would not be my first choice for any range.
I'm guessing your hunt will be in Montana or Wyoming or Colorado or some western state that offers out of state elk hunting. I don't have a problem with out of state hunters getting a chance at our elk, but guided hunters do get more priviledge than the average resident in this state and that rubs me a little. If you do come here or another state and you decide to leave your 300 or 338 at home, make sure when you pull the trigger you get the job done. You get what I'm saying?