I wouldn't worry about energy, the 160gr FTX has over 1000lbs at 300yds starting out at 2400fps, handloads will beat that, the 150gr NBT at 2500 has even more.
Tim
http://www.hornady.com/store/30-30-Win-160-gr-FTX-LEVERevolution/ Gun / Ammunition : .30-30 Win. (SAAMI)
Bullet : .308, 150, Nosler BalTip 30150
Bullet weight : 150 grains or 9.72 Grams
Muzzle velocity : 2500 fps
Crosswind speed : 10 Mph
Ballistic Coefficient(s) (G1):
C1=0.435@V>0 fps;
Table of Various Zero Ranges - Trajectory Path to LOS in inches
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Range 50 yd. 100 yd. 150 yd. 200 yd. 250 yd. 300 yd. 350 yd. 400 yd. 450 yd. 500 yd.
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50 yd. Zero X +0.5 -0.7 -3.7 -8.6 -15.4 -24.7 -36.7 -51.5 -69.4
100 yd. Zero -0.2 X -1.4 -4.6 -9.7 -16.8 -26.3 -38.5 -53.6 -71.7
150 yd. Zero +0.2 +1.0 X -2.7 -7.4 -13.9 -23.0 -34.7 -49.3 -66.9
200 yd. Zero +0.9 +2.3 +2.1 X -3.9 -9.8 -18.2 -29.2 -43.1 -60.1
250 yd. Zero +1.7 +3.9 +4.4 +3.1 X -5.1 -12.7 -22.9 -36.0 -52.2
300 yd. Zero +2.6 +5.6 +7.0 +6.6 +4.3 X -6.7 -16.1 -28.4 -43.7
350 yd. Zero +3.5 +7.5 +9.8 +10.4 +9.0 +5.7 X -8.5 -19.8 -34.1
400 yd. Zero +4.6 +9.6 +13.0 +14.6 +14.3 +12.1 +7.4 X -10.3 -23.5
450 yd. Zero +5.7 +11.9 +16.4 +19.2 +20.0 +18.9 +15.4 +9.1 X -12.1
500 yd. Zero +6.9 +14.3 +20.1 +24.0 +26.1 +26.2 +23.9 +18.8 +10.9 X
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174 yd. PB Zero +0.6 +1.6 +0.9 -1.5 -5.8 -12.1 -20.8 -32.2 -46.5 -63.8
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Velocity fps. 2401.3 2304.9 2210.7 2118.7 2028.7 1940.7 1855.2 1773.0 1693.8 1617.1
Energy ft.lbs. 1920.3 1769.3 1627.7 1495.1 1370.7 1254.4 1146.3 1047.0 955.4 870.9
Deflection in. 0.1 0.8 2.0 3.7 5.8 8.3 11.6 15.8 20.7 26.2
Correction MOA/mph 0.023 0.076 0.127 0.175 0.221 0.265 0.318 0.377 0.438 0.500
Time sec 0.061 0.125 0.191 0.261 0.333 0.407 0.486 0.570 0.657 0.749