Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 139gr | IBEX TRD bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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% | 55,492 psi | 87% | 3251 fps | 99.4% |
| Accurate 4350 | <<locked>> | 88% | 56,768 psi | 89% | 3304 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 57,580 psi | 90% | 3264 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,739 psi | 89% | 3337 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 96% | 54,636 psi | 86% | 3323 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,709 psi | 87% | 3245 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,463 psi | 88% | 3356 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,157 psi | 85% | 3317 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,376 psi | 88% | 3323 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,505 psi | 85% | 3327 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,317 psi | 87% | 3323 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 3301 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,854 psi | 88% | 3412 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3369 fps | 97.8% |
| Bofors RP3 | <<locked>> | 82% | 57,014 psi | 89% | 3264 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 54,505 psi | 85% | 3327 fps | 97.5% |
| Bofors RP7 | <<locked>> | 86% | 55,695 psi | 87% | 3238 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 56,942 psi | 89% | 3278 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 86% | 54,462 psi | 85% | 3287 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,130 psi | 90% | 3301 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,246 psi | 90% | 3307 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,319 psi | 90% | 3278 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,270 psi | 79% | 3343 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 86% | 54,491 psi | 85% | 3314 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 58% | 2113 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,087 psi | 89% | 3248 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,695 psi | 89% | 3268 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,724 psi | 89% | 3261 fps | 98.8% |
| IMR 4831 | <<locked>> | 90% | 56,724 psi | 89% | 3287 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,985 psi | 88% | 3251 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 98% | 55,999 psi | 88% | 3363 fps | 96.4% |
| Lovex S065 | <<locked>> | 86% | 54,563 psi | 86% | 3212 fps | 99.4% |
| Lovex S070 | <<locked>> | 88% | 56,086 psi | 88% | 3258 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 3209 fps | 99.1% |
| Norma 204 | <<locked>> | 88% | 54,157 psi | 85% | 3261 fps | 97% |
| Norma MRP | <<locked>> | 94% | 54,099 psi | 85% | 3353 fps | 98.6% |
| Norma URP | <<locked>> | 88% | 54,897 psi | 86% | 3278 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 56,637 psi | 89% | 3379 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 90% | 57,145 psi | 90% | 3333 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,071 psi | 86% | 3314 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2162 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,318 psi | 88% | 3251 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,290 psi | 90% | 3369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,376 psi | 88% | 3320 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,201 psi | 85% | 3340 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 3343 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 84% | 57,174 psi | 90% | 3261 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,737 psi | 86% | 3238 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 94% | 55,869 psi | 88% | 3310 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 86% | 55,695 psi | 87% | 3238 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,563 psi | 86% | 3212 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 56,086 psi | 88% | 3258 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,592 psi | 86% | 3255 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,681 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,305 psi | 90% | 3212 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,448 psi | 87% | 3304 fps | 97.6% |
| Somchem S355 | <<locked>> | 84% | 56,811 psi | 89% | 3255 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,782 psi | 89% | 3232 fps | 95.8% |
| Somchem S365 | <<locked>> | 90% | 54,723 psi | 86% | 3287 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,840 psi | 89% | 3287 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,418 psi | 85% | 3166 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,536 psi | 89% | 3271 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 98% | 56,130 psi | 88% | 3258 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,057 psi | 88% | 3278 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 94% | 54,737 psi | 86% | 3301 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,057 psi | 88% | 3225 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,462 psi | 85% | 3287 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,695 psi | 87% | 3461 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,507 psi | 89% | 3271 fps | 97.6% |
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>> | 84% | 37,927 psi | 59% | 2887 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 43,918 psi | 69% | 3058 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,068 psi | 80% | 3150 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 46,862 psi | 73% | 3140 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 94% | 51,140 psi | 80% | 3255 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,446 psi | 82% | 3186 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,307 psi | 65% | 3048 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,326 psi | 74% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 46,702 psi | 73% | 3133 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,889 psi | 70% | 3130 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,604 psi | 50% | 2792 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 35,476 psi | 56% | 2917 fps | 95.1% |
| Alliant Reloder-26 | 79.3 gr | 80% | 34,142 psi | 54% | 2920 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 47,094 psi | 74% | 3179 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,664 psi | 84% | 3205 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 44,889 psi | 70% | 3130 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,514 psi | 73% | 3054 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 53,447 psi | 84% | 3215 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 44,947 psi | 70% | 3094 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,384 psi | 74% | 3110 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,577 psi | 84% | 3241 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,320 psi | 62% | 2936 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 44,324 psi | 69% | 3199 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,063 psi | 69% | 3100 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 44% | 1893 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,737 psi | 84% | 3192 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,974 psi | 66% | 2969 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,558 psi | 75% | 3084 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 41,684 psi | 65% | 2992 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,779 psi | 83% | 3192 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 52,388 psi | 82% | 3294 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,687 psi | 72% | 3035 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 44,063 psi | 69% | 3018 fps | 96.6% |
| Lovex S071 | <<locked>> | 88% | 36,883 psi | 58% | 2864 fps | 95.2% |
| Norma 204 | <<locked>> | 84% | 47,529 psi | 74% | 3130 fps | 95.4% |
| Norma MRP | 82.7 gr | 86% | 41,321 psi | 65% | 3081 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 42,743 psi | 67% | 3038 fps | 98.4% |
| Ramshot Grand | <<locked>> | 94% | 49,400 psi | 77% | 3238 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,524 psi | 65% | 3018 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 44,628 psi | 70% | 3104 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,939 psi | 83% | 3189 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,009 psi | 78% | 3251 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,323 psi | 68% | 3068 fps | 98.4% |
| ReloadSwiss RS 70 | 78.6 gr | 80% | 41,481 psi | 65% | 3068 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 41,568 psi | 65% | 3114 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 50,647 psi | 79% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 51,474 psi | 81% | 3176 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 46,151 psi | 72% | 3117 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,514 psi | 73% | 3054 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,687 psi | 72% | 3035 fps | 98% |
| Shooters World SW4350 | <<locked>> | 80% | 44,063 psi | 69% | 3018 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,227 psi | 80% | 3199 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,488 psi | 79% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,715 psi | 70% | 2972 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 45,745 psi | 72% | 3114 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 50,372 psi | 79% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,185 psi | 83% | 3166 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,581 psi | 62% | 2995 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 41,597 psi | 65% | 2982 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,167 psi | 75% | 3058 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,063 psi | 69% | 3035 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 43,511 psi | 68% | 3015 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,714 psi | 69% | 3035 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 35,302 psi | 55% | 2884 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,004 psi | 67% | 2992 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 45,049 psi | 71% | 3094 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,442 psi | 45% | 2772 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 46,354 psi | 73% | 3081 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 69 powders for .300 Norma Mag. loaded with the .308 | 139gr | IBEX TRD. Winchester StaBALL HD delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,113 fps to 3,461 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 69 of the 69 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 139.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, Hodgdon Retumbo 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, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for .300 Norma Mag. with the .308 | 139gr | IBEX TRD 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.