Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 165gr | Barnes TTSX BT bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Norma MRP 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.
A valid access license is required to use the Personalized Load Calculator.
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 3100 | <<locked>> | 96% | 54,607 psi | 86% | 3031 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,159 psi | 88% | 3077 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,217 psi | 88% | 3186 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 96% | 57,290 psi | 90% | 3189 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 57,638 psi | 90% | 3045 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,232 psi | 90% | 3130 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,013 psi | 86% | 3130 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,567 psi | 64% | 2887 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,508 psi | 90% | 3130 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,508 psi | 90% | 3130 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,376 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,290 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,694 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,710 psi | 89% | 3117 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,665 psi | 86% | 3123 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,753 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 3094 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,072 psi | 88% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3166 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 56,333 psi | 88% | 3031 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,210 psi | 74% | 3012 fps | 96.7% |
| Bofors RP5 | <<locked>> | 96% | 54,665 psi | 86% | 3123 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 55,434 psi | 87% | 3025 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 3045 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,362 psi | 88% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,491 psi | 85% | 3074 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 57,305 psi | 90% | 3091 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 54,911 psi | 86% | 3064 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,740 psi | 90% | 3114 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,537 psi | 90% | 3058 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,299 psi | 79% | 3150 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 54,940 psi | 86% | 3110 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 58% | 1936 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,058 psi | 89% | 3025 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,956 psi | 89% | 3061 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,072 psi | 89% | 3051 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,521 psi | 89% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,130 psi | 88% | 3054 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,420 psi | 88% | 3166 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 57,406 psi | 90% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,421 psi | 90% | 3048 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,390 psi | 87% | 3038 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2986 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 54,273 psi | 85% | 3058 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 54,404 psi | 85% | 3146 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 54,679 psi | 86% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,392 psi | 90% | 3192 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 57,508 psi | 90% | 3120 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3117 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,246 psi | 88% | 3038 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,027 psi | 85% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,260 psi | 88% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,810 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3153 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 56,376 psi | 88% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,998 psi | 86% | 3041 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,159 psi | 88% | 3107 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,434 psi | 87% | 3025 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,421 psi | 90% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,406 psi | 90% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,390 psi | 87% | 3038 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,476 psi | 85% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,782 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,768 psi | 89% | 2995 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,709 psi | 87% | 3100 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,173 psi | 88% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,565 psi | 89% | 3031 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 54,824 psi | 86% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,565 psi | 89% | 3077 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 57,696 psi | 90% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,724 psi | 89% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,057 psi | 88% | 3051 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 55,869 psi | 88% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,215 psi | 85% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,418 psi | 85% | 3136 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3107 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,463 psi | 88% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,679 psi | 86% | 3077 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,782 psi | 89% | 3074 fps | 98.9% |
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% | 33,460 psi | 52% | 2602 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 42,366 psi | 66% | 2831 fps | 99.4% |
| Accurate High Country | 81.4 gr | 88% | 45,426 psi | 71% | 2979 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 92% | 49,647 psi | 78% | 3051 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,908 psi | 80% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,785 psi | 64% | 2815 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 44,657 psi | 70% | 2927 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 35,462 psi | 56% | 2749 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,089 psi | 64% | 2815 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,089 psi | 64% | 2815 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,822 psi | 81% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,843 psi | 64% | 2841 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,326 psi | 74% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,640 psi | 64% | 2808 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,408 psi | 65% | 2861 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,008 psi | 47% | 2575 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,111 psi | 50% | 2651 fps | 95.7% |
| Alliant Reloder-26 | 76.2 gr | 80% | 32,634 psi | 51% | 2700 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 41,017 psi | 64% | 2851 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 52,620 psi | 82% | 2976 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,947 psi | 69% | 2946 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 41,408 psi | 65% | 2861 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 45,730 psi | 72% | 2844 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 43,976 psi | 69% | 2904 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 52,707 psi | 83% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,295 psi | 69% | 2884 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 47,181 psi | 74% | 2910 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 47,790 psi | 75% | 2936 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,876 psi | 73% | 2917 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,479 psi | 60% | 2723 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,377 psi | 60% | 2867 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 43,743 psi | 69% | 2900 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 43% | 1732 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,577 psi | 84% | 2972 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,278 psi | 65% | 2769 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,137 psi | 74% | 2874 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 40,451 psi | 63% | 2776 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,470 psi | 73% | 2874 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 45,876 psi | 72% | 2966 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 53,940 psi | 85% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,498 psi | 70% | 2818 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 42,830 psi | 67% | 2802 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 32,677 psi | 51% | 2582 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,104 psi | 64% | 2799 fps | 95.3% |
| Norma MRP | 77.7 gr | 84% | 37,869 psi | 59% | 2808 fps | 96% |
| Norma URP | <<locked>> | 80% | 41,858 psi | 66% | 2822 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 45,905 psi | 72% | 2979 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 40,785 psi | 64% | 2812 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 37,869 psi | 59% | 2772 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,533 psi | 82% | 2972 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,270 psi | 79% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,424 psi | 66% | 2851 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,843 psi | 64% | 2864 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,724 psi | 59% | 2848 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,400 psi | 77% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,107 psi | 71% | 2858 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 39,929 psi | 63% | 2792 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 45,730 psi | 72% | 2844 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,498 psi | 70% | 2818 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 53,940 psi | 85% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,830 psi | 67% | 2802 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,981 psi | 80% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,009 psi | 78% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,555 psi | 68% | 2762 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,581 psi | 62% | 2785 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 49,385 psi | 77% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,516 psi | 78% | 2910 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 38,609 psi | 61% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,840 psi | 59% | 2713 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 47,311 psi | 74% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,366 psi | 68% | 2822 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 88% | 40,059 psi | 63% | 2756 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 42,685 psi | 67% | 2822 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 33,634 psi | 53% | 2657 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 90% | 47,166 psi | 74% | 3002 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 46,818 psi | 73% | 2976 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,540 psi | 67% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,469 psi | 70% | 2884 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,542 psi | 42% | 2552 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,740 psi | 62% | 2753 fps | 95% |
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 | 165gr | Barnes TTSX BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,241 fps. ADI AR 2225 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. The 165.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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. Accurate High Country, Norma MRP, Alliant Reloder-26 rank at the top here: for .300 Norma Mag. with the .308 | 165gr | Barnes TTSX 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.