1 of 1 .300 RCM factory loads carry 1,000 ft·lb and expansion velocity for mule deer; the best reach 850 yd (Hornady Precision Hunter 178 gr ELD-X). Ranked, with the drop chart for each.
| Load | gr | Max ethical yd | MV fps | 500 yd ft·lb | Shoulder shot |
|---|---|---|---|---|---|
| Hornady Precision Hunter 178 gr ELD-X | 178 | 850 | 2,900 | 1,756 | yes |
Deer-class rules of thumb; a slightly bigger animal than a whitetail. Legal: CO: 1,000 ft·lb at 100 yd. Floor used: 1,000 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: chuckhawks.com, www.petersenshunting.com.