What's the bullet you have in mind ajax? I think the best bullet out there is the Berger 180gr vld. Currently I'm shooting A 210 gr Berger out of my 300 WSM @2900fps (WIN780). This set up is great but two things I don't like about it.
First the recoil. My gun weighs 16.5 pounds, so recoil is mild on the pain scale, but controlling it accurately is a difficult task.
Second, the 210 grs bullets and 68gr(+/-) powder per round and norma brass @$170/100gets costly. To be a consistently good 1000yd+ shooter takes lots of practice.
I used to shoot 6.5-284 but found it wore out barrels too fast.
My next Barrel will be a .284 Shehane which is a has a slightly larger body than the standard .284 and allows an extra 3.5 grains of powder. This decision may also change if the availablilty of Reloder 17 in Canada does not change. Apparently with 55-ish grains Reloader 17 and a 30-32" tube people are clocking +3000fps with a 180 gr Berger VLD. IMO nothing will touch that B.C./fps combo unless using the 7mmWSM/RUM at the cost of 20%+ more powder and reduced barrel life. Also a Very fast 6mm with 115gr VLD's may beat it , but once again I hate changing barrels often.
My decisions for 1000yd and (+) shooting will now start with the best B.C. bullet with a targeted speed that shows LR performance with reasonable barrel life and recoil. Then comes availability of quality brass and other components (I have to find out the availability of .284 Shehane dies, apparently Redding makes them on a limited basis for Bill, and his store may carry them). I also don't like fiddling with brass too much. I prefer to just chamber a factory brass and fire form.
Anyhow my 2 cents.