Mule Deer's recipe for long range - 400 yard - 7x57 loads (posted on the Magnificent 7x57 thread)
-----------------------------
Have done that with a couple of loads:

The Nosler 140 Tip and 50.0 grains of IMR4350. This was in a "red pad" Ruger No. 1A with the typical very long throat of older Ruger 7x57's, and would be a pretty hot load in some rifles. Muzzle velocity was around 2850 fps.

The Sierra 160 GameKing and 46.0 grains of H4350. This was in my Kilimanjaro custom rifle, which has a minimal throat, so probably wouldn't be too hot in many rifles. Muzzle velocity is right around 2700 fps.
_________________________
John


"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown