Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 150gr | Impala LW CFN bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,667 psi | 90% | 3186 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,390 psi | 87% | 3176 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,563 psi | 86% | 3264 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 94% | 55,535 psi | 87% | 3261 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,869 psi | 88% | 3130 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,042 psi | 86% | 3205 fps | 98% |
| ADI AR 2213 | <<locked>> | 96% | 56,681 psi | 89% | 3264 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,931 psi | 67% | 3035 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,492 psi | 87% | 3205 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,492 psi | 87% | 3205 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,348 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,114 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,449 psi | 88% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,824 psi | 86% | 3196 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,681 psi | 89% | 3268 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,624 psi | 90% | 3248 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 3241 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,244 psi | 85% | 3278 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,680 psi | 87% | 3248 fps | 98.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3163 fps | 96.4% |
| Bofors RP5 | <<locked>> | 96% | 56,681 psi | 89% | 3268 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 57,392 psi | 90% | 3163 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3176 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 86% | 56,391 psi | 88% | 3219 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 55,405 psi | 87% | 3166 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,666 psi | 89% | 3199 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,463 psi | 87% | 3182 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,709 psi | 87% | 3146 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,214 psi | 82% | 3294 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 56,594 psi | 89% | 3248 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2031 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,085 psi | 86% | 3140 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,013 psi | 86% | 3127 fps | 99% |
| IMR 4831 | <<locked>> | 88% | 55,419 psi | 87% | 3163 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,667 psi | 90% | 3182 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 96% | 54,404 psi | 85% | 3238 fps | 96.8% |
| Lovex S065 | <<locked>> | 86% | 56,246 psi | 88% | 3140 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 57,740 psi | 90% | 3186 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3143 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 56,043 psi | 88% | 3196 fps | 98% |
| Norma MRP | <<locked>> | 94% | 56,434 psi | 88% | 3294 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 56,768 psi | 89% | 3205 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,882 psi | 86% | 3255 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,622 psi | 87% | 3205 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3261 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 2080 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,767 psi | 87% | 3235 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,911 psi | 86% | 3189 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,449 psi | 88% | 3274 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 3291 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 82% | 55,564 psi | 87% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,594 psi | 89% | 3176 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 92% | 54,520 psi | 85% | 3186 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 86% | 57,392 psi | 90% | 3163 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,246 psi | 88% | 3140 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 57,740 psi | 90% | 3186 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,478 psi | 89% | 3179 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,056 psi | 86% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,390 psi | 87% | 3081 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,580 psi | 90% | 3241 fps | 98.5% |
| Somchem S355 | <<locked>> | 82% | 55,100 psi | 86% | 3117 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,911 psi | 86% | 3104 fps | 96.1% |
| Somchem S365 | <<locked>> | 90% | 56,971 psi | 89% | 3212 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,303 psi | 87% | 3159 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 84% | 56,086 psi | 88% | 3084 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,071 psi | 86% | 3140 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,491 psi | 85% | 3133 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,549 psi | 85% | 3150 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,797 psi | 89% | 3228 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,246 psi | 88% | 3278 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3258 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,360 psi | 85% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,594 psi | 89% | 3219 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,592 psi | 86% | 3330 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,810 psi | 86% | 3146 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 3100 | <<locked>> | 80% | 34,693 psi | 54% | 2720 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 45,556 psi | 71% | 2992 fps | 99.4% |
| Accurate High Country | <<locked>> | 88% | 47,674 psi | 75% | 3130 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 92% | 51,735 psi | 81% | 3192 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,576 psi | 82% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 45,542 psi | 71% | 3018 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 49,748 psi | 78% | 3130 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 96% | 38,130 psi | 60% | 2907 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 43,250 psi | 68% | 2959 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 43,250 psi | 68% | 2959 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,969 psi | 85% | 3104 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,830 psi | 67% | 2986 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,240 psi | 77% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,859 psi | 67% | 2953 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 43,729 psi | 69% | 3012 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,880 psi | 52% | 2743 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 34,650 psi | 54% | 2808 fps | 95.7% |
| Alliant Reloder-26 | 77.9 gr | 80% | 35,636 psi | 56% | 2874 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 43,308 psi | 68% | 2999 fps | 95.1% |
| Bofors RP30 | <<locked>> | 98% | 46,470 psi | 73% | 3100 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 43,729 psi | 69% | 3012 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 47,979 psi | 75% | 2989 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 46,137 psi | 72% | 3041 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,499 psi | 73% | 3028 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 48,878 psi | 77% | 3045 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 52,968 psi | 83% | 3133 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,083 psi | 82% | 3120 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,843 psi | 64% | 2874 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 43,337 psi | 68% | 3087 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 45,774 psi | 72% | 3045 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,221 psi | 68% | 2907 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,950 psi | 77% | 3015 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 43,265 psi | 68% | 2933 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 51,111 psi | 80% | 3064 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 47,906 psi | 75% | 3107 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,108 psi | 74% | 2969 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 45,382 psi | 71% | 2953 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 36,172 psi | 57% | 2756 fps | 95.7% |
| Norma 204 | <<locked>> | 82% | 46,137 psi | 72% | 3005 fps | 95.8% |
| Norma MRP | 79.4 gr | 84% | 40,437 psi | 63% | 2966 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,208 psi | 69% | 2972 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 47,979 psi | 75% | 3120 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 43,033 psi | 67% | 2959 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 40,451 psi | 63% | 2923 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1867 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,011 psi | 82% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,049 psi | 71% | 3005 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,076 psi | 68% | 3012 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 40,408 psi | 63% | 3002 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 52,214 psi | 82% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 47,181 psi | 74% | 2999 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 42,308 psi | 66% | 2940 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 47,979 psi | 75% | 2989 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,108 psi | 74% | 2969 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,382 psi | 71% | 2953 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,910 psi | 83% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,866 psi | 81% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,137 psi | 72% | 2907 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 44,657 psi | 70% | 2995 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,011 psi | 82% | 3064 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 51,576 psi | 81% | 3045 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 41,205 psi | 65% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 40,451 psi | 63% | 2864 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 49,603 psi | 78% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,542 psi | 71% | 2969 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 42,453 psi | 67% | 2900 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 45,194 psi | 71% | 2972 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 36,811 psi | 58% | 2828 fps | 98.1% |
| Vihtavuori N560 | <<locked>> | 92% | 52,620 psi | 82% | 3212 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 49,559 psi | 78% | 3130 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,454 psi | 70% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,688 psi | 73% | 3031 fps | 97.8% |
| Winchester StaBALL HD | 74.8 gr | 80% | 29,588 psi | 46% | 2740 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 88% | 45,034 psi | 71% | 2959 fps | 95.7% |
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 | 150gr | Impala LW CFN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,330 fps. ADI AR 2225 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 150.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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, Winchester StaBALL HD, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 150gr | Impala LW CFN 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.