Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 178gr | Hornady BTHP Match bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and Norma MRP.
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>> | 94% | 55,405 psi | 87% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,768 psi | 89% | 2976 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,014 psi | 89% | 3094 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 92% | 54,070 psi | 85% | 3031 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,595 psi | 90% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,450 psi | 90% | 3031 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 55,187 psi | 86% | 3035 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2927 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,280 psi | 69% | 2884 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,027 psi | 85% | 2969 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,493 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,926 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,043 psi | 89% | 3022 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,245 psi | 87% | 3031 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,376 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,000 psi | 89% | 3097 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,029 psi | 89% | 2995 fps | 96.2% |
| Bofors RP15 | <<locked>> | 96% | 54,433 psi | 85% | 3015 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2999 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 55,245 psi | 87% | 3031 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 55,448 psi | 87% | 2920 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3022 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 84% | 54,752 psi | 86% | 2972 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 57,203 psi | 90% | 2986 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 55,216 psi | 87% | 2972 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,983 psi | 85% | 2953 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,186 psi | 85% | 2900 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3136 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,114 psi | 86% | 3009 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,942 psi | 89% | 2959 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,695 psi | 89% | 2943 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,898 psi | 89% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,144 psi | 88% | 2956 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 56,768 psi | 89% | 3074 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 57,377 psi | 90% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,709 psi | 87% | 2940 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,476 psi | 85% | 2959 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 39,914 psi | 63% | 2805 fps | 97.5% |
| Norma MRP | <<locked>> | 92% | 55,172 psi | 86% | 3054 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,129 psi | 86% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,737 psi | 84% | 3031 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,682 psi | 90% | 3018 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,072 psi | 88% | 3028 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,768 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,984 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,622 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 3009 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,782 psi | 89% | 2923 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,056 psi | 86% | 2946 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 56,405 psi | 88% | 3009 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 55,448 psi | 87% | 2920 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,377 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,709 psi | 87% | 2940 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,521 psi | 89% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,855 psi | 89% | 2897 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,956 psi | 88% | 3002 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 56,333 psi | 88% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,652 psi | 89% | 2936 fps | 98.1% |
| Somchem S365 | <<locked>> | 88% | 55,506 psi | 87% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,927 psi | 89% | 2979 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 57,566 psi | 90% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,855 psi | 89% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,608 psi | 89% | 2963 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 55,985 psi | 88% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,172 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,969 psi | 86% | 3048 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 98% | 54,839 psi | 86% | 3025 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 3015 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,304 psi | 88% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,752 psi | 86% | 2972 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,157 psi | 85% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,014 psi | 89% | 2979 fps | 99.4% |
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% | 34,519 psi | 54% | 2539 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 46,195 psi | 72% | 2802 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 43,018 psi | 67% | 2831 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 88% | 46,789 psi | 73% | 2897 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,940 psi | 85% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,479 psi | 60% | 2667 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 42,076 psi | 66% | 2779 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 94% | 40,509 psi | 63% | 2740 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 34,069 psi | 53% | 2631 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,914 psi | 61% | 2674 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,280 psi | 69% | 2808 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,256 psi | 80% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,566 psi | 60% | 2667 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,898 psi | 58% | 2664 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,156 psi | 52% | 2569 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,850 psi | 48% | 2533 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,303 psi | 57% | 2707 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,534 psi | 84% | 2933 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 39,204 psi | 61% | 2717 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 39,465 psi | 62% | 2756 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 36,898 psi | 58% | 2664 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,805 psi | 76% | 2805 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 38,841 psi | 61% | 2703 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 47,761 psi | 75% | 2854 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 50,415 psi | 79% | 2871 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,005 psi | 71% | 2789 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,150 psi | 69% | 2772 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,727 psi | 65% | 2694 fps | 100% |
| Hodgdon Retumbo | 77.8 gr | 88% | 36,695 psi | 57% | 2736 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 47,529 psi | 74% | 2881 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 44% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,222 psi | 69% | 2736 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,212 psi | 79% | 2835 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 44,048 psi | 69% | 2749 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,656 psi | 68% | 2726 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 43,323 psi | 68% | 2818 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 47,776 psi | 75% | 2782 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 46,021 psi | 72% | 2769 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 31,821 psi | 50% | 2470 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 44,309 psi | 69% | 2772 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 34,838 psi | 55% | 2677 fps | 95.5% |
| Norma MRP | 73.4 gr | 80% | 36,013 psi | 56% | 2671 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 45,208 psi | 71% | 2789 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,176 psi | 63% | 2759 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 44,150 psi | 69% | 2785 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 35,911 psi | 56% | 2638 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 45% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,209 psi | 72% | 2825 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,353 psi | 70% | 2841 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,417 psi | 52% | 2641 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,601 psi | 73% | 2936 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 53,113 psi | 83% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,641 psi | 67% | 2713 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 37,898 psi | 59% | 2651 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,805 psi | 76% | 2805 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,776 psi | 75% | 2782 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 46,021 psi | 72% | 2769 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,098 psi | 83% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,833 psi | 73% | 2733 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,594 psi | 59% | 2644 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 52,982 psi | 83% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,439 psi | 68% | 2700 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 42,264 psi | 66% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,493 psi | 60% | 2638 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,618 psi | 79% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,731 psi | 73% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,665 psi | 56% | 2562 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,035 psi | 72% | 2785 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,144 psi | 58% | 2648 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 44,657 psi | 70% | 2854 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 41,814 psi | 66% | 2776 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 47,848 psi | 75% | 2946 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,890 psi | 72% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,950 psi | 75% | 2858 fps | 99.2% |
| Winchester StaBALL HD | 72.6 gr | 80% | 29,428 psi | 46% | 2579 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,623 psi | 59% | 2615 fps | 95.3% |
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 76 powders for .300 Norma Mag. loaded with the .308 | 178gr | Hornady BTHP Match. Hodgdon Retumbo delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,136 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 178.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Hodgdon Retumbo, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 178gr | Hornady BTHP Match 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.