Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 130gr | Barnes X BT bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 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 2700 | <<locked>> | 82% | 55,985 psi | 88% | 3284 fps | 97.6% |
| Accurate 3100 | <<locked>> | 98% | 56,101 psi | 88% | 3346 fps | 99% |
| Accurate 4064 | <<locked>> | 82% | 56,855 psi | 89% | 3307 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,479 psi | 90% | 3406 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 55,143 psi | 86% | 3314 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 57,566 psi | 90% | 3432 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,434 psi | 88% | 3346 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,681 psi | 89% | 3373 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,000 psi | 89% | 3458 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,853 psi | 86% | 3422 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,942 psi | 89% | 3419 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,737 psi | 86% | 3415 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3415 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,501 psi | 76% | 3323 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,912 psi | 88% | 3507 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3396 fps | 96.5% |
| Bofors RP3 | <<locked>> | 82% | 54,447 psi | 85% | 3310 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,737 psi | 86% | 3415 fps | 96.9% |
| Bofors RP7 | <<locked>> | 88% | 56,739 psi | 89% | 3340 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 54,389 psi | 85% | 3320 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 88% | 55,216 psi | 87% | 3386 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 86% | 54,534 psi | 85% | 3337 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,302 psi | 85% | 3320 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 55,405 psi | 87% | 3415 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,825 psi | 58% | 2172 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,810 psi | 86% | 3297 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,058 psi | 89% | 3327 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 57,638 psi | 90% | 3366 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,534 psi | 85% | 3304 fps | 98% |
| IMR 4831 | <<locked>> | 92% | 57,450 psi | 90% | 3389 fps | 99.9% |
| Lovex S062 | <<locked>> | 82% | 55,448 psi | 87% | 3301 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,274 psi | 87% | 3307 fps | 99.1% |
| Lovex S070 | <<locked>> | 90% | 56,710 psi | 89% | 3353 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 3235 fps | 98.1% |
| Norma 203B | <<locked>> | 82% | 56,072 psi | 88% | 3356 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,940 psi | 86% | 3356 fps | 96.5% |
| Norma MRP | <<locked>> | 96% | 54,578 psi | 86% | 3448 fps | 98.1% |
| Norma URP | <<locked>> | 90% | 55,448 psi | 87% | 3379 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 82% | 56,724 psi | 89% | 3376 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3471 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 90% | 54,244 psi | 85% | 3366 fps | 98.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3330 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2224 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,493 psi | 90% | 3356 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,273 psi | 85% | 3419 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,101 psi | 89% | 3422 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,027 psi | 86% | 3438 fps | 99.6% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,037 psi | 75% | 3346 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 57,566 psi | 90% | 3320 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,636 psi | 86% | 3310 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 56,550 psi | 89% | 3406 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 88% | 56,739 psi | 89% | 3340 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,274 psi | 87% | 3307 fps | 99.1% |
| Shooters World Precision | <<locked>> | 82% | 55,448 psi | 87% | 3301 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,710 psi | 89% | 3353 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,419 psi | 87% | 3363 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,549 psi | 85% | 3182 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,984 psi | 86% | 3251 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,072 psi | 88% | 3399 fps | 97.1% |
| Somchem S355 | <<locked>> | 86% | 57,595 psi | 90% | 3356 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,201 psi | 87% | 3389 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,493 psi | 90% | 3383 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 82% | 57,725 psi | 90% | 3274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,551 psi | 90% | 3281 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,419 psi | 87% | 3274 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,348 psi | 90% | 3373 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3346 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 82% | 56,086 psi | 88% | 3274 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,797 psi | 89% | 3376 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 96% | 54,868 psi | 86% | 3392 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,014 psi | 89% | 3327 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,405 psi | 87% | 3386 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3488 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,305 psi | 90% | 3366 fps | 97.1% |
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% | 52,620 psi | 82% | 3222 fps | 97% |
| Accurate 3100 | <<locked>> | 88% | 40,553 psi | 64% | 3031 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 53,534 psi | 84% | 3251 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,408 psi | 65% | 3084 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,052 psi | 77% | 3199 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 50,662 psi | 79% | 3297 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,966 psi | 78% | 3232 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,185 psi | 83% | 3310 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,320 psi | 62% | 3077 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,686 psi | 70% | 3225 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 50,386 psi | 79% | 3291 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 48,080 psi | 75% | 3284 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,863 psi | 47% | 2802 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 37,956 psi | 59% | 3058 fps | 95.3% |
| Alliant Reloder-26 | 83 gr | 84% | 36,767 psi | 58% | 3068 fps | 95.6% |
| Bofors RP15 | <<locked>> | 98% | 50,560 psi | 79% | 3333 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,995 psi | 80% | 3251 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 48,080 psi | 75% | 3284 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,628 psi | 70% | 3091 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 50,966 psi | 80% | 3255 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 42,554 psi | 67% | 3117 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 48,124 psi | 75% | 3205 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,115 psi | 58% | 2963 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 82% | 44,759 psi | 70% | 3199 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1949 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,532 psi | 81% | 3238 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,577 psi | 84% | 3264 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 45,237 psi | 71% | 3123 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,455 psi | 71% | 3117 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 39,392 psi | 62% | 3022 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 52,185 psi | 82% | 3241 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,584 psi | 68% | 3071 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 41,989 psi | 66% | 3048 fps | 95.2% |
| Lovex S071 | <<locked>> | 92% | 39,291 psi | 62% | 3002 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 52,591 psi | 82% | 3294 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 51,445 psi | 81% | 3291 fps | 95.6% |
| Norma MRP | 86.3 gr | 90% | 44,527 psi | 70% | 3238 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 40,480 psi | 63% | 3068 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 52,982 psi | 83% | 3314 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 53,417 psi | 84% | 3399 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,247 psi | 62% | 3041 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 48,370 psi | 76% | 3258 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 44% | 1998 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,734 psi | 80% | 3228 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,239 psi | 74% | 3291 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,828 psi | 64% | 3091 fps | 97.1% |
| ReloadSwiss RS 70 | 78.3 gr | 80% | 39,320 psi | 62% | 3091 fps | 96.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 44,802 psi | 70% | 3264 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 54,157 psi | 85% | 3261 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,167 psi | 75% | 3189 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 49,632 psi | 78% | 3271 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,628 psi | 70% | 3091 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,584 psi | 68% | 3071 fps | 96.9% |
| Shooters World Precision | <<locked>> | 80% | 52,185 psi | 82% | 3241 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,989 psi | 66% | 3048 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,718 psi | 76% | 3235 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,341 psi | 76% | 3081 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,844 psi | 67% | 3005 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 49,197 psi | 77% | 3268 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,051 psi | 75% | 3182 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 37,101 psi | 58% | 3022 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 44,730 psi | 70% | 3130 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 54,259 psi | 85% | 3222 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,201 psi | 85% | 3228 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,890 psi | 72% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,771 psi | 65% | 3064 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 46,746 psi | 73% | 3159 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,692 psi | 83% | 3219 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,481 psi | 65% | 3068 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 80% | 33,185 psi | 52% | 2900 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,843 psi | 64% | 3022 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 42,728 psi | 67% | 3120 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 30,371 psi | 48% | 2910 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 94% | 50,183 psi | 79% | 3235 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 74 powders for .300 Norma Mag. loaded with the .308 | 130gr | Barnes X BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,507 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,507 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 74 of the 74 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 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Norma Mag. with the .308 | 130gr | Barnes X BT 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.