My Remington 700 243 shot the 75gr VMaxs fairly well, yours might not like them. Its actually been a few years since I've shot my 700. I might hafta load 10 of the Vmaxs up an go do some bangin now.

For now, I'd work on your breathing an trigger control. The rest will come with practice.

I also never let a rifle barrel get overly warm. I shoot 3 shot groups mainly, I'll shoot the group. Walk down range to my target, while leaving the action open on the rifle to cool. Then I take my time getting back, and if I am shooting more than 1 rifle, I'll shoot that rifle next and give the other plenty of time to cool off. When I find my load, I then cold bore sight in my rifle. I shoot one shot, and let the gun cool for a good 10 minutes, then shoot my 2nd shot, and so on.