Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 165gr | Frontier PH HPBT bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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% | 56,202 psi | 88% | 3054 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,667 psi | 90% | 3097 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,580 psi | 90% | 3205 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 94% | 54,752 psi | 86% | 3140 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 82% | 55,129 psi | 86% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,708 psi | 86% | 3087 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 56,130 psi | 88% | 3146 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,036 psi | 74% | 2966 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,785 psi | 65% | 2917 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,868 psi | 86% | 3081 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,868 psi | 86% | 3081 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,536 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,766 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,883 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,186 psi | 85% | 3074 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,898 psi | 88% | 3140 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,043 psi | 89% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,765 psi | 83% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,606 psi | 84% | 3150 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,868 psi | 86% | 3123 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 57,711 psi | 90% | 3048 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3035 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 55,898 psi | 88% | 3140 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 56,521 psi | 89% | 3038 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 3064 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 55,608 psi | 87% | 3091 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 54,882 psi | 86% | 3048 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 56,260 psi | 88% | 3084 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,969 psi | 86% | 3064 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,114 psi | 86% | 3018 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3173 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 56,130 psi | 88% | 3127 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,592 psi | 86% | 3022 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,621 psi | 86% | 3009 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 54,302 psi | 85% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,334 psi | 90% | 3071 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 57,580 psi | 90% | 3182 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 55,187 psi | 86% | 3009 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,797 psi | 89% | 3054 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 3009 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,390 psi | 87% | 3074 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 55,709 psi | 87% | 3166 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 56,086 psi | 88% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,563 psi | 86% | 3143 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 54,766 psi | 86% | 3077 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,782 psi | 89% | 3136 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 59% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,334 psi | 90% | 3051 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,245 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,609 psi | 90% | 3117 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,970 psi | 88% | 3146 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 3173 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 54,259 psi | 85% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,072 psi | 88% | 3058 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 57,363 psi | 90% | 3123 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 56,521 psi | 89% | 3038 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,187 psi | 86% | 3009 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,797 psi | 89% | 3054 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,796 psi | 87% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,740 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,491 psi | 85% | 2956 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,913 psi | 89% | 3120 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 57,392 psi | 90% | 3038 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,157 psi | 85% | 2989 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 56,115 psi | 88% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,201 psi | 85% | 3035 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 55,100 psi | 86% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,186 psi | 85% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,508 psi | 90% | 3071 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 57,058 psi | 89% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,695 psi | 87% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,622 psi | 87% | 3156 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3130 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,522 psi | 90% | 3025 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,811 psi | 87% | 3094 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,317 psi | 85% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,128 psi | 85% | 3028 fps | 98.6% |
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>> | 80% | 32,576 psi | 51% | 2575 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 43,801 psi | 69% | 2854 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 43,482 psi | 68% | 2936 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 92% | 50,981 psi | 80% | 3071 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 51,866 psi | 81% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,800 psi | 66% | 2835 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 45,730 psi | 72% | 2946 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 43,918 psi | 69% | 2897 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,767 psi | 58% | 2782 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,293 psi | 66% | 2838 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,293 psi | 66% | 2838 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,142 psi | 83% | 2976 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,047 psi | 66% | 2864 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,472 psi | 76% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,872 psi | 66% | 2831 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,943 psi | 63% | 2828 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,285 psi | 49% | 2608 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,082 psi | 49% | 2618 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,953 psi | 53% | 2736 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 42,206 psi | 66% | 2874 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 53,998 psi | 85% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,409 psi | 66% | 2910 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 39,943 psi | 63% | 2828 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 46,833 psi | 73% | 2864 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 42,105 psi | 66% | 2861 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 45,600 psi | 71% | 2907 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,211 psi | 76% | 2923 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 49,081 psi | 77% | 2959 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,979 psi | 75% | 2936 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,595 psi | 62% | 2746 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,523 psi | 62% | 2897 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 44,904 psi | 70% | 2923 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,279 psi | 66% | 2785 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,240 psi | 76% | 2894 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 41,698 psi | 65% | 2799 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,427 psi | 74% | 2894 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 43,903 psi | 69% | 2920 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 45,818 psi | 72% | 2841 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,990 psi | 69% | 2822 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 31,937 psi | 50% | 2559 fps | 95% |
| Norma 204 | <<locked>> | 80% | 42,134 psi | 66% | 2818 fps | 95.6% |
| Norma MRP | 75.8 gr | 82% | 36,318 psi | 57% | 2766 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 43,033 psi | 67% | 2841 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 43,714 psi | 69% | 2930 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,916 psi | 66% | 2835 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 39,131 psi | 61% | 2799 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,780 psi | 84% | 2992 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,474 psi | 81% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,729 psi | 69% | 2874 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,959 psi | 66% | 2887 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,318 psi | 57% | 2805 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 50,763 psi | 80% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,137 psi | 72% | 2874 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 41,104 psi | 64% | 2815 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 46,833 psi | 73% | 2864 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,818 psi | 72% | 2841 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 43,990 psi | 69% | 2822 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,069 psi | 82% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,155 psi | 80% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,860 psi | 70% | 2785 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,741 psi | 64% | 2808 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 50,763 psi | 80% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,369 psi | 74% | 2864 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 39,885 psi | 63% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,521 psi | 57% | 2674 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,457 psi | 76% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,527 psi | 70% | 2841 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 38,537 psi | 60% | 2717 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,019 psi | 69% | 2841 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 34,998 psi | 55% | 2687 fps | 98.4% |
| Vihtavuori N560 | 83.2 gr | 90% | 48,385 psi | 76% | 3022 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 45,092 psi | 71% | 2936 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,584 psi | 68% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,600 psi | 71% | 2907 fps | 98.3% |
| Winchester StaBALL HD | 73.2 gr | 80% | 27,731 psi | 43% | 2595 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,060 psi | 64% | 2779 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 78 powders for .300 Norma Mag. loaded with the .308 | 165gr | Frontier PH HPBT. Accurate High Country delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,205 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 1:12.0 twist; slower twists will usually not stabilise this weight. 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 Norma Mag. with the .308 | 165gr | Frontier PH HPBT 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.