I dont know how much less bullet drop you want but here are some balistic tables on 308, 7mm Mag, and 300 Ultra Mag.

308 With 150 Grain Bullet
Velocity
Muzzle - 2820
100 - 2611
200 - 2410
300 - 2219
400 - 2037
500 - 1863

Energy
Muzzle - 2648
100 - 2269
200 - 1935
300 - 1640
400 - 1381
500 - 1156

Bullet Drop
100 - 1.8
150 - 1.6
200 - Zero
250 - -3.1
300 - -7.8
400 - -22.6
500 - -46.0

7mm Mag With 150 Grain Bullet
Velocity
Muzzle - 3110
100 - 2927
200 - 2751
300 - 2582
400 - 2419
500 - 2262

Energy
Muzzle - 3221
100 - 2852
200 - 2520
300 - 2220
400 - 1948
500 - 1704

Bullet Drop
100 - 1.3
150 - 1.2
200 - Zero
250 - -2.3
300 - -5.9
400 - -17.0
500 - -34.0

300 Ultra Mag With 180 Grain Bullet
Velocity
Muzzle - 3250
100 - 3048
200 - 2856
300 - 2672
400 - 2495
500 - 2325

Energy
Muzzle - 4221
100 - 3714
200 - 3260
300 - 2853
400 - 2487
500 - 2160

Bullet Drop
100 - 2.0
150 - 2.3
200 - 1.7
250 - Zero
300 - -2.8
400 - -12.3
500 - -27.3

I feel that a 7mm is a decent step up from a 308 without gettin into the Ultra Mags. The 7mm has mild recoil compared to the Ultra Mags also.