6 of 6 8x57 JRS factory loads carry 800 ft·lb and expansion velocity for pronghorn; the best reach 550 yd (Lapua 180 gr Naturalis (N559)). Ranked, with the drop chart for each.
| Load | gr | Max ethical yd | MV fps | 500 yd ft·lb | Shoulder shot |
|---|---|---|---|---|---|
| Lapua 180 gr Naturalis (N559) | 180 | 550 | 2,641 | 936 | yes |
| Norma 160 gr Ecostrike | 160 | 500 | 2,625 | 822 | yes |
| Norma 180 gr Tipstrike | 180 | 500 | 2,493 | 840 | behind the shoulder only |
| Norma 196 gr Oryx | 196 | 450 | 2,395 | 754 | yes |
| Norma 196 gr Vulkan | 196 | 450 | 2,395 | 797 | behind the shoulder only |
| Norma 196 gr Whitetail SP | 196 | 400 | 2,395 | 683 | behind the shoulder only |
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.