Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 150gr | Norma SPFN bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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% | 55,303 psi | 87% | 3166 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 56,884 psi | 89% | 3219 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 54,549 psi | 85% | 3127 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,682 psi | 90% | 3264 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 55,390 psi | 87% | 3261 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,234 psi | 65% | 3009 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,738 psi | 87% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,406 psi | 90% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,100 psi | 86% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,174 psi | 90% | 3251 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,187 psi | 86% | 3255 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,101 psi | 88% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3232 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,913 psi | 89% | 3333 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,114 psi | 85% | 3235 fps | 98% |
| Bofors RP3 | <<locked>> | 82% | 56,840 psi | 89% | 3173 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 3143 fps | 96.1% |
| Bofors RP5 | <<locked>> | 96% | 55,187 psi | 86% | 3255 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 55,840 psi | 88% | 3156 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 3169 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 56,884 psi | 89% | 3189 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,897 psi | 86% | 3209 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 84% | 54,099 psi | 85% | 3163 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,434 psi | 87% | 3196 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,230 psi | 85% | 3176 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,244 psi | 85% | 3140 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,879 psi | 80% | 3281 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 55,274 psi | 87% | 3241 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 58% | 2044 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,421 psi | 90% | 3166 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,406 psi | 90% | 3196 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,276 psi | 90% | 3186 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 57,145 psi | 90% | 3209 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,608 psi | 89% | 3182 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 56,855 psi | 89% | 3297 fps | 97.6% |
| Lovex S065 | <<locked>> | 86% | 54,505 psi | 85% | 3130 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 56,028 psi | 88% | 3176 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,721 psi | 83% | 3123 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 54,824 psi | 86% | 3192 fps | 98% |
| Norma MRP | <<locked>> | 94% | 55,042 psi | 86% | 3281 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 55,259 psi | 87% | 3199 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,708 psi | 84% | 3248 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 88% | 54,201 psi | 85% | 3196 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3251 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 59% | 2090 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,565 psi | 89% | 3169 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,360 psi | 85% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,884 psi | 89% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,056 psi | 86% | 3264 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3281 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 57,087 psi | 89% | 3173 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,376 psi | 87% | 3173 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,565 psi | 89% | 3238 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 55,840 psi | 88% | 3156 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,505 psi | 85% | 3130 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 56,028 psi | 88% | 3176 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,998 psi | 86% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,130 psi | 90% | 3041 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,290 psi | 90% | 3133 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,115 psi | 88% | 3232 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 56,681 psi | 89% | 3163 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,130 psi | 90% | 3159 fps | 96.8% |
| Somchem S365 | <<locked>> | 90% | 55,405 psi | 87% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,116 psi | 90% | 3209 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 54,520 psi | 85% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,174 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,681 psi | 89% | 3186 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 56,434 psi | 88% | 3196 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,911 psi | 86% | 3212 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,926 psi | 86% | 3268 fps | 96.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3238 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,840 psi | 89% | 3146 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,085 psi | 86% | 3209 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,348 psi | 90% | 3205 fps | 98.5% |
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>> | 82% | 34,330 psi | 54% | 2726 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 43,091 psi | 68% | 2963 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 51,271 psi | 80% | 3068 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 44,179 psi | 69% | 3005 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 48,269 psi | 76% | 3120 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 38,595 psi | 60% | 2936 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,373 psi | 82% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,220 psi | 65% | 2969 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,558 psi | 75% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,990 psi | 69% | 2995 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,047 psi | 66% | 2989 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,705 psi | 48% | 2697 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,882 psi | 55% | 2831 fps | 96% |
| Alliant Reloder-26 | 80.4 gr | 80% | 33,359 psi | 52% | 2822 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 44,454 psi | 70% | 3041 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 53,156 psi | 83% | 3114 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,643 psi | 70% | 3071 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 42,047 psi | 66% | 2989 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,166 psi | 72% | 2972 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 96% | 44,498 psi | 70% | 3025 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 53,258 psi | 83% | 3127 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 44,773 psi | 70% | 3009 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 47,456 psi | 74% | 3035 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 51,750 psi | 81% | 3130 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,647 psi | 79% | 3110 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,986 psi | 61% | 2848 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,640 psi | 65% | 3061 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,179 psi | 69% | 3025 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 1831 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,911 psi | 84% | 3107 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,727 psi | 65% | 2890 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,572 psi | 75% | 3005 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 41,075 psi | 64% | 2904 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,893 psi | 78% | 3058 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 49,661 psi | 78% | 3159 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 45,179 psi | 71% | 2949 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 43,482 psi | 68% | 2933 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 35,737 psi | 56% | 2766 fps | 95.7% |
| Norma 204 | <<locked>> | 82% | 44,599 psi | 70% | 2989 fps | 95.5% |
| Norma MRP | 81.9 gr | 84% | 38,334 psi | 60% | 2930 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,409 psi | 66% | 2949 fps | 98.9% |
| Ramshot Grand | <<locked>> | 92% | 46,383 psi | 73% | 3100 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 41,234 psi | 65% | 2933 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 41,510 psi | 65% | 2963 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 44% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,040 psi | 83% | 3110 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,473 psi | 79% | 3163 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,047 psi | 67% | 2979 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,379 psi | 65% | 2992 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,566 psi | 60% | 2969 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 50,096 psi | 79% | 3054 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,631 psi | 76% | 3045 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 43,265 psi | 68% | 2979 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,166 psi | 72% | 2972 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,179 psi | 71% | 2949 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 43,482 psi | 68% | 2933 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,314 psi | 80% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,386 psi | 79% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,237 psi | 69% | 2890 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,888 psi | 67% | 2972 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 50,053 psi | 78% | 3051 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,951 psi | 78% | 3031 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,204 psi | 61% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 41,104 psi | 64% | 2897 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,892 psi | 75% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,816 psi | 69% | 2949 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 40,654 psi | 64% | 2877 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,250 psi | 68% | 2946 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,301 psi | 54% | 2779 fps | 97.4% |
| Vihtavuori N560 | 89.7 gr | 92% | 51,126 psi | 80% | 3199 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 47,587 psi | 75% | 3104 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,989 psi | 67% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,933 psi | 70% | 3012 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,209 psi | 43% | 2667 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,221 psi | 68% | 2940 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 81 powders for .300 Norma Mag. loaded with the .308 | 150gr | Norma SPFN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,379 fps; across all powders the maximum-charge window runs from 2,044 fps to 3,379 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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. 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Norma Mag. with the .308 | 150gr | Norma SPFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 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.