Re: best long range 7mm for 1200 yrds+?
If I was in your shoes, which I was last year. I built the 7-338norma mag improved. There are some things you will want to consider when you start shooting out at 1mile and further(you will be there before you know it). Now I am no expert I am just passing on information I learned when myself and Nate planned and tested his 284 Jazz my new rifle. Top notch brass, and a standard magazine is what I was after. My Jazz is built off a Custom long action with 300win mag bottom metal.
Not much info is out yet since I am the only one with one and haven't had much time to test it out. With about 150rounds down the barrel we are using US869 at 97-98 grs. and getting 3200+fps with 180(bergers) and 189(Bob C.). ES of less than 10fps. This was nowhere near a max load. I was happy with the results and decided why push it harder.
"Amazing things can happen when preparation meet opportunity" Richard Schatz
"The will to win, compares little with the will to prepare to win" Donovan Moran