2 of 2 .505 Gibbs factory loads carry 800 ft·lb and expansion velocity for pronghorn; the best reach 1,000 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 | 1,000 | 2,100 | 1,936 | yes |
| Norma African PH Solids 540 gr Norma Solid | 540 | 850 | 2,300 | 1,338 | yes |
Chuck Hawks: ~800 ft·lb at impact with a .24″+ bullet of SD ≥ .215. Legal: CO: 1,000 ft·lb at 100 yd (rifle). Floor used: 800 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, cpw.state.co.us.