I have used H4831 in all of my 7 mags. I have read a lot of positive results with H1000 as well.
The 'smith that built my LR rifle developed that load. It works, so I use it.
My light weight long range rifle is a 270 WSM. I really like that round, especially in a gun that weighs about 8 lbs scoped. Last week this rifle was shooting 1/2 MOA at 842 yards. I shoot H4831 out of it too. Getting 3180 fps with 140 gr. Berger VLD's.
Wait until you get hold of a really accurate looong range rifle. I've had a few, but I am still amazed by the ability of this sort of rifle to reach out to these distances with that level of precision.
It IS awesome!
Edited to add this; Now that you are shooting to 700, you will quickly see the importance of really good scope, rangefinder, and ballistic software. You also need really accurate data to input to your software.
Do you have an anemometer yet? Elevation is easy, it's the wind that is hard. Is your reticle plumb to the center of bore, and do you have a level on your rifle to keep everything plumb? How about some means of measuring incline?
You are entering another level of precision shooting, and will need the right tools to be successful. I got tired of missing varmints by inches, and the right tools, along with learning how to use them, has increased my kill percentage dramatically.
My limit on the 7 mag is 800 yards. Any closer than that and it's not sporting.