If what you are after is a rifle to take a bull elk at 1000 yards, then I would consider a 300 win. mag. You had said that you were going to build this gun, I would contact Dave Manson at manson precision reamers and have him make you a reamer that cuts the belt ten thousands deeper and a headspace guage to go with that. I have one sitting here and am waiting for my krieger barrel to show up so I can get this done. I bought a rem sendero, and it was a piece of junk, they replaced the first rifle for me and the second was no better. The barrel to reciever alignment is horrible. The best that I can get is a 6 inch group at 700 yards, and that is after 2 years of dealing with rem and alot of reloading. Hope this helps.