What do you plan to shoot with it?

I don't shoot at 700 yards because my range steel only goes out to 565 yards.

The only thing I have shot the steel with in my 300RUM at 565 yards are 180 ETips.

I normally use my 308 to shoot the 565 yard steel. My favorite bullets are 125 TNTs cause they are cheap.

At 700yards with the RUM I would think there would be several decent choices.

At much farther yardage, it would make more sense to split hairs.

It isn't energy that kills, its holes.