No .30-40 Krag factory load we have sourced carries 1,500 ft·lb for elk past the muzzle. Here is why, load by load.
| Load | gr | Max ethical yd | MV fps | 500 yd ft·lb | Shoulder shot |
|---|---|---|---|---|---|
| Hornady Custom 180 gr SP (Spire Point) InterLock | 180 | wrong bullet | 2,430 | 940 | behind the shoulder only |
| Remington 180 gr Pointed Soft Point Core-Lokt | 180 | wrong bullet | 2,430 | 845 | behind the shoulder only |
| Winchester Super-X 180 gr Power-Point | 180 | wrong bullet | 2,430 | 871 | behind the shoulder only |
1,500 ft·lb is the number most repeated (Guns & Ammo, Backfire); Hawks says 1,200, Boddington floats 2,000. Avoid quick-opening and match bullets. Legal: SD: ≥ .243 and 1,700 ft·lb at muzzle · 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.gunsandammo.com, www.chuckhawks.com, www.petersenshunting.com, regulations.justia.com.