Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 150gr | Ferrobull Entox Sport bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Hodgdon H414.
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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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 2700 | <<locked>> | 82% | 56,289 psi | 88% | 3133 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 55,941 psi | 88% | 3186 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 55,709 psi | 87% | 3114 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,580 psi | 90% | 3235 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,883 psi | 88% | 3156 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,013 psi | 86% | 3225 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,623 psi | 89% | 3287 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,898 psi | 89% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,942 psi | 89% | 3199 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,882 psi | 86% | 3245 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,173 psi | 88% | 3261 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,375 psi | 85% | 3209 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,057 psi | 88% | 3278 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3258 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 3179 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,508 psi | 90% | 3350 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3255 fps | 98.1% |
| Bofors RP3 | <<locked>> | 82% | 54,041 psi | 85% | 3133 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 56,057 psi | 88% | 3278 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 57,058 psi | 89% | 3186 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,443 psi | 76% | 3117 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,288 psi | 85% | 3153 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,985 psi | 88% | 3235 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 55,274 psi | 87% | 3189 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 96% | 56,608 psi | 89% | 3222 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,361 psi | 87% | 3199 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,100 psi | 86% | 3159 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,935 psi | 75% | 3225 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,681 psi | 89% | 3274 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 57% | 2034 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,158 psi | 86% | 3133 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,566 psi | 90% | 3176 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 54,853 psi | 86% | 3159 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,129 psi | 86% | 3153 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 54,346 psi | 85% | 3169 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,230 psi | 85% | 3146 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,041 psi | 85% | 3255 fps | 96.9% |
| Lovex S062 | <<locked>> | 82% | 55,419 psi | 87% | 3127 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,303 psi | 87% | 3146 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,927 psi | 89% | 3196 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,647 psi | 78% | 3074 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 56,246 psi | 88% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,970 psi | 88% | 3219 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 55,811 psi | 87% | 3304 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 56,130 psi | 88% | 3219 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,508 psi | 90% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,621 psi | 86% | 3271 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 90% | 55,143 psi | 86% | 3219 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,852 psi | 83% | 3202 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 58% | 2080 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,244 psi | 85% | 3136 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,579 psi | 87% | 3255 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,740 psi | 90% | 3261 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,188 psi | 88% | 3291 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 3222 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,116 psi | 90% | 3140 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,302 psi | 85% | 3136 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,362 psi | 88% | 3196 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 57,493 psi | 90% | 3261 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 57,058 psi | 89% | 3186 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,303 psi | 87% | 3146 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,419 psi | 87% | 3127 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,927 psi | 89% | 3196 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,057 psi | 88% | 3196 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,998 psi | 86% | 3015 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,824 psi | 86% | 3097 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,029 psi | 89% | 3258 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 57,638 psi | 90% | 3186 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,578 psi | 86% | 3120 fps | 96.2% |
| Somchem S365 | <<locked>> | 92% | 56,188 psi | 88% | 3225 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,346 psi | 85% | 3169 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 57,740 psi | 90% | 3094 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,579 psi | 87% | 3104 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,505 psi | 85% | 3156 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3205 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,202 psi | 88% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,377 psi | 90% | 3219 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,317 psi | 87% | 3228 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,854 psi | 88% | 3291 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3186 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,288 psi | 85% | 3117 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,217 psi | 88% | 3238 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3333 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,549 psi | 85% | 3163 fps | 98% |
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 2700 | <<locked>> | 80% | 52,605 psi | 82% | 3071 fps | 98.3% |
| Accurate 3100 | <<locked>> | 86% | 36,564 psi | 57% | 2795 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,185 psi | 82% | 3058 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,437 psi | 63% | 2913 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,139 psi | 77% | 3038 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,773 psi | 70% | 3025 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 49,226 psi | 77% | 3146 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,980 psi | 78% | 3061 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,374 psi | 84% | 3143 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,189 psi | 61% | 2927 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,976 psi | 70% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,643 psi | 70% | 3018 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,395 psi | 66% | 3005 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,631 psi | 45% | 2641 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,940 psi | 55% | 2844 fps | 95.9% |
| Alliant Reloder-26 | 80.4 gr | 82% | 33,388 psi | 52% | 2835 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 44,730 psi | 70% | 3058 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,531 psi | 79% | 3074 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,395 psi | 66% | 3005 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,005 psi | 69% | 2933 fps | 96.6% |
| Hodgdon H1000 | <<locked>> | 98% | 45,194 psi | 71% | 3045 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 50,879 psi | 80% | 3091 fps | 99.7% |
| Hodgdon H414 | 74.9 gr | 80% | 42,511 psi | 67% | 2969 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,353 psi | 71% | 2995 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 52,692 psi | 83% | 3153 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,735 psi | 81% | 3133 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,680 psi | 57% | 2808 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,800 psi | 66% | 3074 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,698 psi | 65% | 2979 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,663 psi | 81% | 3077 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,070 psi | 85% | 3114 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 39,726 psi | 62% | 2851 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,571 psi | 71% | 2969 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 38,711 psi | 61% | 2861 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,879 psi | 80% | 3084 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 50,270 psi | 79% | 3179 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 51,982 psi | 81% | 3068 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,960 psi | 67% | 2913 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 41,205 psi | 65% | 2887 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 35,418 psi | 56% | 2766 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 52,736 psi | 83% | 3127 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,324 psi | 71% | 3012 fps | 95.7% |
| Norma MRP | 81.9 gr | 86% | 38,725 psi | 61% | 2946 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,089 psi | 63% | 2907 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,534 psi | 84% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,992 psi | 74% | 3120 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 39,088 psi | 61% | 2890 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 41,916 psi | 66% | 2979 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 44% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,705 psi | 79% | 3071 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,790 psi | 75% | 3127 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,480 psi | 63% | 2933 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,015 psi | 61% | 2940 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,783 psi | 61% | 2982 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 53,751 psi | 84% | 3087 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,500 psi | 74% | 3015 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,458 psi | 78% | 3068 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 43,787 psi | 69% | 2999 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,005 psi | 69% | 2933 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,960 psi | 67% | 2913 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 51,982 psi | 81% | 3068 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,205 psi | 65% | 2887 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,066 psi | 77% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,385 psi | 76% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,974 psi | 66% | 2848 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,395 psi | 68% | 2992 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,616 psi | 75% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,865 psi | 80% | 3054 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,695 psi | 57% | 2858 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,394 psi | 65% | 2913 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 54,215 psi | 85% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,571 psi | 71% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,568 psi | 65% | 2910 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 40,988 psi | 64% | 2890 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,779 psi | 83% | 3048 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,017 psi | 64% | 2907 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 31,836 psi | 50% | 2723 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 94% | 52,011 psi | 82% | 3222 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 98% | 47,761 psi | 75% | 3114 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,712 psi | 64% | 2874 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,685 psi | 67% | 2972 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,050 psi | 42% | 2671 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,990 psi | 69% | 2963 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 92 powders for .300 Norma Mag. loaded with the .308 | 150gr | Ferrobull Entox Sport. Alliant Reloder-26 delivers the highest muzzle velocity at 3,350 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,350 fps. ADI AR 2217 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 150.0 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-23 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. Alliant Reloder-26, Norma MRP, Hodgdon H414 rank at the top here: for .300 Norma Mag. with the .308 | 150gr | Ferrobull Entox Sport they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.