I need some help. I've been trying to do load development with my Remington 700 Long Range in .300 Win Mag and I'm having trouble. I had a pretty good load with 208gr A-MAXs and they shot under .5 MOA but then they got discontinued and I decided to try the new 200gr Hornady ELD-X bullets. Well now I've fired 20 rounds with them from 74gr up to 75 gr of IMR 7828 and cannot get them to shoot. This was the node with the A-MAXs and it's not working. I will get 3 shots go within .5" then get two flyers. Will mirage cause this or what? Because I'm getting frustrated and I'm about to give up on it for awhile. I've scrubbed and scrubbed the barrel until almost all the copper is gone and that didn't help. I've left copper in it, same results. Besides telling me to get a new barrel, can anyone give me any ideas? Couple people have told me it might be the mirage but I don't see much of it when I look through the scope on 4x or on 16x. Any help is appreciated thanks.