2 of 2 .505 Gibbs factory loads carry 1,500 ft·lb and expansion velocity for moose; the best reach 600 yd (Norma African PH (Woodleigh Soft Nose) 600 gr). Ranked, with the drop chart for each.
| Load | gr | Max ethical yd | MV fps | 500 yd ft·lb | Shoulder shot |
|---|---|---|---|---|---|
| Norma African PH (Woodleigh Soft Nose) 600 gr | 600 | 600 | 2,100 | 1,936 | yes |
| Norma African PH Solids 540 gr Norma Solid | 540 | 400 | 2,300 | 1,338 | yes |
At least 1,500 ft·lb at impact, ideally nearer 2,000, with a bullet that stays together. Legal: CO: 1,000 ft·lb at 100 yd, ≥ 85 gr. Floor used: 1,500 ft·lb at impact plus the bullet's published expansion velocity. Orange = a target or varmint bullet (construction, not energy); red = never carries the energy. Sources: www.chuckhawks.com, www.nhrifleman.com.