Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 140gr | Barnes RRLP 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 Accurate High Country.
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 2495 | <<locked>> | 82% | 57,290 psi | 90% | 3169 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,781 psi | 86% | 3182 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3287 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 54,201 psi | 85% | 3176 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,506 psi | 87% | 3287 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 54,984 psi | 86% | 3373 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 86% | 57,638 psi | 90% | 3268 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,362 psi | 88% | 3327 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,479 psi | 90% | 3402 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,579 psi | 89% | 3323 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,579 psi | 89% | 3323 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,013 psi | 86% | 3232 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,085 psi | 86% | 3255 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,057 psi | 88% | 3350 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,740 psi | 90% | 3376 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,840 psi | 88% | 3314 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3376 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3304 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,847 psi | 73% | 3209 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,447 psi | 85% | 3389 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,518 psi | 82% | 3287 fps | 96.9% |
| Bofors RP3 | <<locked>> | 84% | 56,072 psi | 88% | 3251 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3376 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 55,259 psi | 87% | 3228 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 56,275 psi | 88% | 3264 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 57,551 psi | 90% | 3340 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 56,869 psi | 89% | 3294 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,449 psi | 88% | 3264 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,522 psi | 90% | 3304 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 54,114 psi | 85% | 3304 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 57% | 2093 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,898 psi | 89% | 3245 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,014 psi | 88% | 3225 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 56,420 psi | 88% | 3261 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,840 psi | 89% | 3261 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 55,738 psi | 87% | 3274 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 56,536 psi | 89% | 3287 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3350 fps | 96.2% |
| Lovex S062 | <<locked>> | 84% | 57,290 psi | 90% | 3241 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,145 psi | 90% | 3258 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 55,100 psi | 86% | 3245 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,732 psi | 75% | 3114 fps | 98.2% |
| Norma 203B | <<locked>> | 82% | 54,389 psi | 85% | 3238 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,595 psi | 90% | 3320 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 57,130 psi | 90% | 3406 fps | 99% |
| Norma URP | <<locked>> | 92% | 57,725 psi | 90% | 3327 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,434 psi | 87% | 3264 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3373 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 56,594 psi | 89% | 3323 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,401 psi | 79% | 3225 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 2139 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,144 psi | 88% | 3245 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,043 psi | 89% | 3369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,477 psi | 87% | 3304 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,824 psi | 84% | 3330 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,253 psi | 72% | 3235 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,709 psi | 87% | 3199 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,144 psi | 88% | 3245 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,404 psi | 85% | 3232 fps | 96% |
| Rottweil R 905 | <<locked>> | 96% | 55,230 psi | 87% | 3297 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 88% | 55,259 psi | 87% | 3228 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,145 psi | 90% | 3258 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 57,290 psi | 90% | 3241 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,100 psi | 86% | 3245 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,056 psi | 85% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,666 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,942 psi | 89% | 3202 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,752 psi | 86% | 3291 fps | 97.4% |
| Somchem S355 | <<locked>> | 86% | 56,043 psi | 88% | 3241 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 57,348 psi | 90% | 3330 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,941 psi | 88% | 3271 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 56,086 psi | 88% | 3156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,246 psi | 88% | 3169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,392 psi | 90% | 3215 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,130 psi | 88% | 3264 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3241 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 54,679 psi | 86% | 3163 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,419 psi | 87% | 3264 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 56,637 psi | 89% | 3333 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,203 psi | 90% | 3392 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,985 psi | 88% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,740 psi | 90% | 3343 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,038 psi | 78% | 3369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,231 psi | 88% | 3264 fps | 97.5% |
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 2495 | <<locked>> | 80% | 53,838 psi | 84% | 3120 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,227 psi | 80% | 3117 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 38,058 psi | 60% | 2900 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,995 psi | 80% | 3123 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,073 psi | 61% | 2956 fps | 97.5% |
| Accurate High Country | 88.8 gr | 94% | 51,213 psi | 80% | 3297 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,732 psi | 75% | 3087 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 46,122 psi | 72% | 3123 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,534 psi | 84% | 3333 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 46,456 psi | 73% | 3123 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 46,456 psi | 73% | 3123 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,356 psi | 76% | 3114 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,663 psi | 81% | 3192 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,753 psi | 59% | 2963 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,265 psi | 68% | 3110 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,905 psi | 72% | 3117 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,586 psi | 73% | 3173 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,733 psi | 47% | 2736 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,071 psi | 57% | 2940 fps | 95.3% |
| Alliant Reloder-26 | 81.8 gr | 84% | 34,737 psi | 54% | 2943 fps | 95.6% |
| Bofors RP15 | <<locked>> | 96% | 45,934 psi | 72% | 3153 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,994 psi | 77% | 3130 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,586 psi | 73% | 3173 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,888 psi | 67% | 2976 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 49,284 psi | 77% | 3140 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 40,973 psi | 64% | 3002 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 46,746 psi | 73% | 3097 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,447 psi | 56% | 2848 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,940 psi | 85% | 3248 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 43,207 psi | 68% | 3084 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 43% | 1873 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,212 psi | 79% | 3130 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,417 psi | 82% | 3159 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 43,729 psi | 69% | 3012 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,309 psi | 69% | 3012 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 37,565 psi | 59% | 2900 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 53,026 psi | 83% | 3225 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 51,692 psi | 81% | 3278 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 50,604 psi | 79% | 3127 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,887 psi | 66% | 2956 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 39,987 psi | 63% | 2927 fps | 95.3% |
| Lovex S071 | <<locked>> | 92% | 36,767 psi | 58% | 2867 fps | 95% |
| Norma 203B | <<locked>> | 80% | 51,024 psi | 80% | 3176 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,862 psi | 73% | 3114 fps | 95.1% |
| Norma MRP | 85 gr | 90% | 42,815 psi | 67% | 3120 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,682 psi | 61% | 2946 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 51,822 psi | 81% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,112 psi | 82% | 3294 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,666 psi | 59% | 2927 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 96% | 43,236 psi | 68% | 3074 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 44% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,139 psi | 77% | 3114 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,948 psi | 72% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,972 psi | 61% | 2969 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,768 psi | 59% | 2976 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 43,091 psi | 68% | 3156 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,243 psi | 82% | 3143 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,021 psi | 72% | 3064 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,966 psi | 80% | 3169 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 45,107 psi | 71% | 3100 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 42,888 psi | 67% | 2976 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,887 psi | 66% | 2956 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 50,604 psi | 79% | 3127 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,987 psi | 63% | 2927 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,340 psi | 74% | 3123 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,036 psi | 74% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,988 psi | 64% | 2890 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 47,819 psi | 75% | 3156 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,340 psi | 73% | 3068 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 35,186 psi | 55% | 2897 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 42,743 psi | 67% | 3012 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,634 psi | 82% | 3104 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,765 psi | 83% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,150 psi | 69% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,118 psi | 63% | 2949 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 45,136 psi | 71% | 3048 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,184 psi | 80% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,682 psi | 62% | 2946 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 33,083 psi | 52% | 2828 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 53,301 psi | 84% | 3320 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,349 psi | 62% | 2913 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 41,133 psi | 64% | 3005 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,224 psi | 44% | 2769 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 48,573 psi | 76% | 3127 fps | 95.8% |
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 84 powders for .300 Norma Mag. loaded with the .308 | 140gr | Barnes RRLP. Norma MRP delivers the highest muzzle velocity at 3,406 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,406 fps. Accurate 3100 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, 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, Accurate High Country rank at the top here: for .300 Norma Mag. with the .308 | 140gr | Barnes RRLP 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.