I am the proud owner of a new Winchester Model 70 Sporter in .264 Winchester Magnum. While I wait to take posession of the rifle, I am gathering dies and components to load for it. The only.264 WM brass that midway has in stock is Nosler Custom. It is more expensive than either Winchester or Norma and I am not sure that the quality of the brass is good enough to justify the cost. I have read that 7mm RM brass can be easily necked down and used in a .264 WM. If I do that, would I need to trim the brass after necking down? Is necking down 7mm RM brass a good way to go or would I be better off waiting for Winchester or Norma .264 brass to be in stock? I load for 6.5x55 and 6.5-284 using Berger VLD's and Hornady AMAX's. It is my understanding that top loads in the .264 WM produce too much velocity for reliable flight/terminal performance from thin jacketed bullets like these. For use on antelope, deer, and the occasional elk, what type and weight of bullet should I be considering for optimum performance? Should I be considering a bonded bullet of some kind or would a monometal bullet be a better choice? I have primarily used the 140's in my smaller cased 6.5's. With what bullet weight does the .264 WM do its best work and what should my expectations be for velocity in that weight? Finally, I am planning to start load development/break-in using Retumbo. What other powders should I consider? I look forward to sorting out my new rifle. Thanks in advance for any advice from my fellow .264 WM shooters.