| LoadID | 4393 |
| Bullet | Speer spitzer |
| Bullet Weight | 250 grs |
| Powder | IMR 4350 |
| Powder Weight | 78.0 grs |
| Primer | CCI 250 |
| Brass Make | Norma |
| Barrel Length | 21.5 (inches) |
| C.O.L | (inches) |
| Velocity | 2720 fps |
| Group 100 yds | 0.75 (inches) |
| Submitted By | Float Pilot |
| Gun Info | Custom M-70 Winchester |
| Comment | M-70 Winchester rebarreled to 358 Norma Mag. This load is very accurate. The COL was sized just to load in the magazine. With one more grain the velocity went up 100 FPS, but the accuracy declined considerably. |