Load Specifications
Load data in caliber .300 Norma Mag. with .310 | 200gr | Rhino Penetrator bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 57,290 psi | 90% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,549 psi | 85% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,115 psi | 88% | 2917 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 55,376 psi | 87% | 2848 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 57,014 psi | 89% | 2917 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2881 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2848 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,535 psi | 87% | 2844 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,535 psi | 87% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,897 psi | 86% | 2838 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,246 psi | 90% | 2910 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,201 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,708 psi | 86% | 2887 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,506 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2900 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,389 psi | 85% | 2818 fps | 97% |
| Bofors RP15 | <<locked>> | 94% | 56,405 psi | 88% | 2897 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 54,360 psi | 85% | 2894 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,246 psi | 90% | 2910 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,289 psi | 88% | 2785 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,739 psi | 89% | 2910 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 55,999 psi | 88% | 2841 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,536 psi | 89% | 2851 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,477 psi | 87% | 2835 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,912 psi | 88% | 2766 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,392 psi | 90% | 3025 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,594 psi | 89% | 2877 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,679 psi | 86% | 2776 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,450 psi | 90% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,911 psi | 86% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,261 psi | 90% | 2831 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 55,172 psi | 86% | 2897 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,092 psi | 71% | 2756 fps | 98.1% |
| Lovex S065 | <<locked>> | 82% | 54,911 psi | 86% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,826 psi | 89% | 2805 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,201 psi | 87% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,608 psi | 87% | 2831 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,426 psi | 71% | 2779 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 57,276 psi | 90% | 2930 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,565 psi | 89% | 2822 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,941 psi | 88% | 2917 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 55,405 psi | 87% | 2831 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,404 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 1814 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,679 psi | 86% | 2812 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,855 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,085 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 2982 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 56,246 psi | 88% | 2818 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 88% | 54,549 psi | 85% | 2828 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 56,289 psi | 88% | 2785 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,911 psi | 86% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,826 psi | 89% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,464 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,143 psi | 85% | 2825 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 54,056 psi | 85% | 2759 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 57,450 psi | 90% | 2825 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,882 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,505 psi | 85% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,607 psi | 86% | 2785 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,348 psi | 90% | 2818 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,246 psi | 90% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,913 psi | 89% | 2930 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 57,276 psi | 90% | 2917 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 98% | 54,099 psi | 85% | 2913 fps | 98.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2969 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,580 psi | 90% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,202 psi | 88% | 2844 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,766 psi | 84% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,766 psi | 86% | 2799 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 38,377 psi | 60% | 2497 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 50,923 psi | 80% | 2733 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 42,380 psi | 66% | 2667 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 42,453 psi | 67% | 2621 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 37,869 psi | 59% | 2552 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 36,854 psi | 58% | 2530 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 29,312 psi | 46% | 2372 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,728 psi | 67% | 2618 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,776 psi | 76% | 2736 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,337 psi | 66% | 2612 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,305 psi | 60% | 2562 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,057 psi | 58% | 2520 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,097 psi | 50% | 2441 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,118 psi | 64% | 2667 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,037 psi | 75% | 2831 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,124 psi | 75% | 2707 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 35,723 psi | 56% | 2500 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 36,187 psi | 57% | 2539 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 38,305 psi | 60% | 2562 fps | 97% |
| Bofors RP7 | <<locked>> | 80% | 52,736 psi | 83% | 2733 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 35,056 psi | 55% | 2487 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 52,446 psi | 82% | 2785 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,451 psi | 63% | 2559 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,697 psi | 62% | 2543 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,919 psi | 72% | 2618 fps | 100% |
| Hodgdon Retumbo | 72.7 gr | 82% | 33,460 psi | 52% | 2526 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 52,533 psi | 82% | 2815 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,254 psi | 76% | 2671 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,099 psi | 85% | 2753 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,312 psi | 76% | 2677 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,930 psi | 66% | 2559 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 80% | 36,651 psi | 57% | 2536 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,811 psi | 58% | 2575 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 51,706 psi | 81% | 2703 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,183 psi | 79% | 2700 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,156 psi | 52% | 2375 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 48,501 psi | 76% | 2713 fps | 99% |
| Norma 217 | <<locked>> | 90% | 32,387 psi | 51% | 2487 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 40,321 psi | 63% | 2631 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 49,690 psi | 78% | 2717 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,216 psi | 57% | 2539 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 48,457 psi | 76% | 2720 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,430 psi | 51% | 2425 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,966 psi | 80% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,168 psi | 77% | 2776 fps | 100% |
| ReloadSwiss RS 76 | 75.9 gr | 80% | 30,284 psi | 47% | 2431 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,409 psi | 66% | 2713 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 43,482 psi | 68% | 2595 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 41,858 psi | 66% | 2602 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 52,736 psi | 83% | 2733 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,706 psi | 81% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,183 psi | 79% | 2700 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,604 psi | 79% | 2657 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,524 psi | 65% | 2595 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 44,237 psi | 69% | 2585 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 47,123 psi | 74% | 2674 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,351 psi | 66% | 2585 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 51,010 psi | 80% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,796 psi | 58% | 2461 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 80% | 50,459 psi | 79% | 2713 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,524 psi | 65% | 2595 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,292 psi | 63% | 2621 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 84% | 38,145 psi | 60% | 2559 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 43,772 psi | 69% | 2726 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 98% | 51,300 psi | 80% | 2907 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,212 psi | 79% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,634 psi | 82% | 2785 fps | 100% |
| Winchester StaBALL HD | 72.8 gr | 80% | 33,794 psi | 53% | 2556 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,899 psi | 61% | 2513 fps | 97.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .300 Norma Mag. loaded with the .310 | 200gr | Rhino Penetrator. Hodgdon Retumbo delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,025 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.31" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .300 Norma Mag. with the .310 | 200gr | Rhino Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.