Depends on what you're thinking of in terms of a rifle.   One of our members over at ArizonaGunOwners just completed a 6.5 Creedmore rifle and is extremely happy with it.  You can find the thread over there www.arizonagunowners.com in the "Rifles" section under the title, She's Done by car-ram-rod.   Might be a chance to take a look at a real world rifle by somebody you can chat with about it who speaks long range rifle shooting. 

An interesting article to be sure. Thanks for sharing it. I found it very interesting since I am in the beginning stages of building up a long range rifle. Ballistics has never really been my thing. From reading about those three though I would lean toward the 260 Remington round. I have read a little about it but not a whole lot. The 6.5 Creedmore I have heard more about than read and from what I have heard it is good. The Lupua round I haven’t ever heard of. Sounds like any of the three would be a good choice. I suppose if it was up to me it would come down to barrel life, which one puts the least wear on a barrel?

How do those compare to 308? I would assume with them being more modern that they are probably better at least for hitting targets. I don’t know how they would compare when it came to snipping bad guys. Best guess is out of that lot the 260 Remington would hit the hardest which is the other reason I would initially lean to that round out of the three.

Another thing I think the 260 Reminton has going for it is, that it seems closer to 308 than the others so I would think that it would be easier to get it to feed from AICS mags. I don't know if you are going that route but, I rather like the AICS stock system.

7mm WSM.

But between the two in the OP... .260.

I took the 6.5CM out of consideration because of barrel life.

I have a 7WSM.  The only problem with it is finding brass.  It doesn't exist.  Supposedly Winchester will make some in 2015.  They didn't make any in 2014.  Everyone that I know that shoots 7WSM says that finding brass is the main downside to it.  I've got 50 brass.  Wish I had 300.

I plan to use this next rifle in PRS type competitions as well as F-Class.  Right now the big thing is .260 and 6.5CM.  Some local guys are jumping on the x47.  One "advantage" of the x47 is that it uses a small primer, which supposedly means the brass will last longer because of fewer loose primer pockets.

Wish I had the money to just do both.  In terms of cost, the .260 seems to be less expensive for brass.  Both will use the same components.  The .260 uses the .308 profile so I wouldn't need to buy a new headspace gauge.

I'm still up in the air on this.

Regarding 7mm WSM brass:

.270 WSW brass can be used.  You will need to expand the case necks, but in this instance good full length resizing dies are enough.  It can be found.