Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 200gr | Speer TBBC 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 ReloadSwiss RS 80.
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>> | 90% | 55,303 psi | 87% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,970 psi | 88% | 2812 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,869 psi | 89% | 2943 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 88% | 53,983 psi | 85% | 2887 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 88% | 56,753 psi | 89% | 2874 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 54,911 psi | 86% | 2887 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,884 psi | 89% | 2917 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2877 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,087 psi | 89% | 2874 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,087 psi | 89% | 2874 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,174 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,434 psi | 88% | 2867 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,303 psi | 87% | 2884 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,898 psi | 89% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,478 psi | 89% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,392 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,867 psi | 84% | 2936 fps | 97% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,724 psi | 87% | 2848 fps | 97.5% |
| Bofors RP15 | <<locked>> | 92% | 54,520 psi | 85% | 2871 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 56,231 psi | 88% | 2927 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 55,303 psi | 87% | 2884 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,537 psi | 90% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,636 psi | 86% | 2884 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 57,493 psi | 90% | 2867 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,491 psi | 85% | 2825 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,116 psi | 90% | 2864 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,217 psi | 90% | 2789 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,506 psi | 87% | 2999 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1785 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,811 psi | 87% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,434 psi | 88% | 2805 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,085 psi | 86% | 2805 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 92% | 57,000 psi | 89% | 2930 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,833 psi | 73% | 2789 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 56,159 psi | 88% | 2776 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,549 psi | 85% | 2776 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,768 psi | 89% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,956 psi | 89% | 2858 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2815 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 55,129 psi | 86% | 2897 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,288 psi | 85% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 53,867 psi | 84% | 2887 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 56,782 psi | 89% | 2854 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,304 psi | 88% | 2881 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 60% | 1827 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,173 psi | 88% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,592 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,086 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,317 psi | 87% | 2949 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 57,537 psi | 90% | 2844 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 56,144 psi | 88% | 2858 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 57,537 psi | 90% | 2812 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,159 psi | 88% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,549 psi | 85% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,143 psi | 86% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,738 psi | 87% | 2854 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 55,317 psi | 87% | 2782 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 55,317 psi | 87% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,391 psi | 88% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,796 psi | 87% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,188 psi | 88% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 55,216 psi | 87% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,274 psi | 87% | 2825 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,737 psi | 86% | 2897 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 94% | 55,201 psi | 87% | 2887 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 56,260 psi | 88% | 2953 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3012 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,230 psi | 87% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,696 psi | 90% | 2871 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,912 psi | 88% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,202 psi | 88% | 2825 fps | 99.9% |
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% | 39,537 psi | 62% | 2523 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 52,373 psi | 82% | 2759 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,192 psi | 68% | 2697 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 80% | 40,698 psi | 64% | 2635 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 43,511 psi | 68% | 2648 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 38,943 psi | 61% | 2582 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 37,869 psi | 59% | 2559 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 84% | 30,240 psi | 47% | 2405 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,932 psi | 69% | 2648 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,932 psi | 69% | 2648 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,053 psi | 78% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,526 psi | 68% | 2641 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,479 psi | 62% | 2592 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,348 psi | 60% | 2546 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,996 psi | 52% | 2467 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,772 psi | 67% | 2700 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 46,485 psi | 73% | 2805 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,296 psi | 73% | 2677 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 36,738 psi | 58% | 2526 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 35,099 psi | 55% | 2516 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 39,479 psi | 62% | 2592 fps | 97.5% |
| Bofors RP7 | <<locked>> | 80% | 53,998 psi | 85% | 2759 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 36,100 psi | 57% | 2520 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 53,708 psi | 84% | 2808 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,539 psi | 65% | 2589 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,785 psi | 64% | 2572 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,282 psi | 74% | 2641 fps | 100% |
| Hodgdon Retumbo | 72.8 gr | 80% | 32,242 psi | 51% | 2490 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1594 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,226 psi | 77% | 2694 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 49,617 psi | 78% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,844 psi | 67% | 2582 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 37,608 psi | 59% | 2559 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 35,723 psi | 56% | 2552 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,968 psi | 83% | 2730 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,213 psi | 80% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,185 psi | 54% | 2402 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 49,864 psi | 78% | 2743 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 31,444 psi | 49% | 2461 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 41,713 psi | 65% | 2661 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 50,879 psi | 80% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,333 psi | 59% | 2569 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 49,835 psi | 78% | 2746 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,402 psi | 52% | 2451 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 45% | 1634 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,475 psi | 82% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,865 psi | 80% | 2805 fps | 100% |
| ReloadSwiss RS 76 | 77.9 gr | 80% | 31,270 psi | 49% | 2464 fps | 96.2% |
| ReloadSwiss RS 80 | 88.4 gr | 90% | 40,915 psi | 64% | 2684 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 44,643 psi | 70% | 2625 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 43,091 psi | 68% | 2631 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 53,998 psi | 85% | 2759 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,968 psi | 83% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,213 psi | 80% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,750 psi | 81% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,772 psi | 67% | 2625 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 45,513 psi | 71% | 2615 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 48,385 psi | 76% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,497 psi | 68% | 2608 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 52,330 psi | 82% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,884 psi | 59% | 2487 fps | 97.6% |
| Vihtavuori N550 | <<locked>> | 80% | 51,663 psi | 81% | 2736 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,670 psi | 67% | 2618 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,611 psi | 65% | 2654 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 84% | 39,378 psi | 62% | 2592 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 90% | 42,322 psi | 66% | 2697 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 96% | 49,545 psi | 78% | 2877 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,503 psi | 81% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,911 psi | 84% | 2812 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,389 psi | 55% | 2589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,958 psi | 63% | 2539 fps | 97.6% |
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 .308 | 200gr | Speer TBBC. Vihtavuori N570 delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,785 fps to 3,012 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 0.308" calls for a 1:12.5 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, ReloadSwiss RS 80 rank at the top here: for .300 Norma Mag. with the .308 | 200gr | Speer TBBC 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.