Chris,
Your approach is all wrong. Energy in itself does not kill an animal, neither does a bullet's "Knock-down power", expressed in FPE. Shot placement and velocities high enough to produce reliable expansion at your maximum range is what matters. Shooting any animal in the leg with any bullet will not result in a kill, but placing same bullet in the proper place (head, and heart/lung) will result in clean kills every time.
You've mentioned Berger bullets, VLDs specifically. Those are great hunting bullets, however, they have a minimum expansion velocity of 1,800fps. That velocity determines the maximum distance you can expect to get reliable, clean kills, assume proper shot placement.
You can/will be able to get 168 VLDs up to 2,700ft/s through your 18" barrel, although your accuracy node may be a little slower or faster...you have to work up a load for your rifle.
Also note that the Berger VLDs tend to be very picky about seating depth. They like to be either 0.010" jammed into the lands or about .035" jumped to the lands...for me, they've produced crappy groups (1.0" to 1.5") out side of this narrow window.
In order to stretch your range a bit, you could also consider the Hornady AMAX...they have a much lower expansion velocity (probably in the 1,300 - 1,500 ft/s range) and are much less picky about seating depth.
P.S. Please drop the "meters" crap. You are an american, shooting in the states, with ranges, equipment and optics mostly calibrated and denoted in yards, feet, & inches...saying "i shot at 300meters (328.2yards) is douchy.
