My first .264 was a pre-64 Model 70 Winchester that had belonged for many years to a local rancher. He handloaded the 129-grain Hornady Interlock Spire Point and killed a lot of elk at ranges out to 500+ yards with no problems.
I haven't killed an elk, but my 264 shoots tiny little groups, that you could cover with a quater at 200 yards with this load.