I have been shooting a Remington 700 Milspec 5r in .300WM for a number of years now. Now that I have reached the 1000yd stage I'm considering a rifle that will take me beyond this range. I have settled on a Weatherby Mark Accumark RC but can't make my mine up on the round to use. Anybody have any experience firing these cartridges long range target? Like you input before I spend big bucks.