Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 180gr | Sellier & Bellot HPC bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,695 psi | 87% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,058 psi | 89% | 2966 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,348 psi | 90% | 3087 fps | 99% |
| Accurate MAGPRO | <<locked>> | 92% | 54,433 psi | 85% | 3025 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 90% | 54,143 psi | 85% | 2966 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 55,506 psi | 87% | 3028 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 2923 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,556 psi | 70% | 2881 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,331 psi | 85% | 2963 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,389 psi | 85% | 2969 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,201 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,334 psi | 90% | 3012 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,550 psi | 87% | 3022 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,971 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,464 psi | 90% | 3087 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,348 psi | 90% | 2989 fps | 96.4% |
| Bofors RP15 | <<locked>> | 96% | 54,737 psi | 86% | 3005 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2992 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 55,550 psi | 87% | 3022 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 55,651 psi | 87% | 2910 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3015 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,027 psi | 86% | 2966 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,638 psi | 90% | 2979 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 55,506 psi | 87% | 2966 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,476 psi | 85% | 2946 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,665 psi | 86% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3130 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,434 psi | 87% | 3002 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,377 psi | 90% | 2953 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,101 psi | 89% | 2933 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,406 psi | 90% | 2956 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,608 psi | 89% | 2949 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 57,377 psi | 90% | 3068 fps | 98.9% |
| Lovex S065 | <<locked>> | 84% | 54,389 psi | 85% | 2881 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,941 psi | 88% | 2930 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,694 psi | 86% | 2949 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 40,205 psi | 63% | 2802 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 55,535 psi | 87% | 3045 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,390 psi | 87% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,070 psi | 85% | 3022 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 54,317 psi | 85% | 2953 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,492 psi | 89% | 3018 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 59% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,043 psi | 89% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,521 psi | 87% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3127 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 3002 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 56,985 psi | 89% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,274 psi | 87% | 2933 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 56,913 psi | 89% | 3002 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,651 psi | 87% | 2910 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,389 psi | 85% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,941 psi | 88% | 2930 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,710 psi | 89% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,072 psi | 89% | 2887 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,478 psi | 89% | 2999 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,724 psi | 89% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,956 psi | 89% | 2930 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 55,999 psi | 88% | 2953 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,435 psi | 90% | 2976 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 54,288 psi | 85% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,130 psi | 90% | 2940 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,942 psi | 89% | 2953 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,434 psi | 88% | 2946 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,492 psi | 87% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,347 psi | 87% | 3041 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 55,259 psi | 87% | 3018 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3009 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,797 psi | 89% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,230 psi | 87% | 2969 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,607 psi | 86% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,319 psi | 90% | 2969 fps | 99.5% |
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% | 34,838 psi | 55% | 2536 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 46,630 psi | 73% | 2799 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 40,495 psi | 63% | 2762 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 88% | 47,311 psi | 74% | 2894 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 38,812 psi | 61% | 2664 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 42,467 psi | 67% | 2776 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 40,886 psi | 64% | 2736 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 34,287 psi | 54% | 2628 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,218 psi | 61% | 2667 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,454 psi | 70% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,532 psi | 81% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,885 psi | 61% | 2661 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,101 psi | 58% | 2657 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,315 psi | 52% | 2562 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,095 psi | 46% | 2464 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,521 psi | 57% | 2700 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,795 psi | 84% | 2927 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 36,912 psi | 58% | 2651 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 39,740 psi | 62% | 2746 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 37,101 psi | 58% | 2657 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 49,153 psi | 77% | 2802 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,044 psi | 61% | 2694 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 48,153 psi | 75% | 2848 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,604 psi | 79% | 2861 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 45,237 psi | 71% | 2779 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,541 psi | 70% | 2766 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,076 psi | 66% | 2684 fps | 100% |
| Hodgdon Retumbo | 77.6 gr | 88% | 36,912 psi | 58% | 2733 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 47,819 psi | 75% | 2871 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,570 psi | 70% | 2730 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,372 psi | 79% | 2822 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,222 psi | 69% | 2740 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,961 psi | 69% | 2720 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 40,828 psi | 64% | 2753 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,964 psi | 75% | 2772 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,354 psi | 73% | 2762 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 30,023 psi | 47% | 2411 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 44,686 psi | 70% | 2769 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 35,099 psi | 55% | 2677 fps | 95.8% |
| Norma MRP | 73.2 gr | 80% | 36,260 psi | 57% | 2664 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 45,600 psi | 71% | 2782 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,596 psi | 64% | 2759 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,498 psi | 70% | 2779 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 36,187 psi | 57% | 2631 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,442 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,427 psi | 73% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,585 psi | 70% | 2831 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,765 psi | 53% | 2641 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,978 psi | 74% | 2933 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,505 psi | 84% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,190 psi | 63% | 2648 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 38,101 psi | 60% | 2644 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 49,153 psi | 77% | 2802 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,964 psi | 75% | 2772 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,354 psi | 73% | 2762 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,447 psi | 84% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,963 psi | 74% | 2720 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,768 psi | 59% | 2638 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 53,156 psi | 83% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,627 psi | 68% | 2694 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 42,685 psi | 67% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,696 psi | 61% | 2628 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 50,995 psi | 80% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,094 psi | 74% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,839 psi | 56% | 2556 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,412 psi | 73% | 2779 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,492 psi | 59% | 2641 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 44,947 psi | 70% | 2848 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 42,105 psi | 66% | 2769 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 48,399 psi | 76% | 2943 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,108 psi | 72% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,341 psi | 76% | 2848 fps | 99.3% |
| Winchester StaBALL HD | 72.5 gr | 80% | 29,733 psi | 47% | 2575 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,942 psi | 59% | 2608 fps | 95.5% |
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 75 powders for .300 Norma Mag. loaded with the .308 | 180gr | Sellier & Bellot HPC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,130 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 180.0 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. Hodgdon Retumbo, Winchester StaBALL HD, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 180gr | Sellier & Bellot HPC 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.