Load Specifications
Bullet:.308 | 190gr | Speer Impact
Bullet Manufacturer:Speer
Bullet Weight:190 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 Norma Mag. load data
Case Length (l3):2.49"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:104 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:11.5
Load data in caliber .300 Norma Mag. with .308 | 190gr | Speer Impact bullet and 144 powders. The key underlying parameters are shown in the table above.
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>> | 92% | 56,637 psi | 89% | 2877 fps | 100% |
| Accurate 3100 | <<locked>> | 92% | 55,129 psi | 86% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,725 psi | 90% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,347 psi | 88% | 2881 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,375 psi | 85% | 2966 fps | 99.1% |
| Accurate High Country | <<locked>> | 90% | 56,695 psi | 89% | 3005 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 90% | 55,274 psi | 87% | 2972 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 90% | 53,824 psi | 84% | 2946 fps | 98% |
| ADI AR 2209 | <<locked>> | 88% | 54,578 psi | 86% | 2907 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 56,956 psi | 89% | 2943 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,318 psi | 88% | 2976 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 92% | 54,795 psi | 86% | 2946 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,389 psi | 85% | 2940 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2913 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,747 psi | 76% | 2900 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,384 psi | 74% | 2874 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,955 psi | 86% | 2907 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,276 psi | 90% | 2940 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,955 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,101 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,331 psi | 85% | 2897 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,594 psi | 89% | 2933 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,536 psi | 89% | 2972 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,056 psi | 86% | 2943 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,447 psi | 85% | 2887 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,521 psi | 89% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,609 psi | 90% | 3002 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,014 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,592 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,217 psi | 90% | 3009 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,334 psi | 90% | 2933 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,159 psi | 88% | 2907 fps | 96.8% |
| Bofors RP15 | <<locked>> | 94% | 55,724 psi | 87% | 2956 fps | 99.7% |
| Bofors RP15 | <<locked>> | 94% | 54,259 psi | 85% | 2930 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3009 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2982 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,536 psi | 89% | 2972 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 55,056 psi | 86% | 2943 fps | 99.7% |
| Bofors RP7 | <<locked>> | 82% | 55,709 psi | 87% | 2848 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 54,665 psi | 86% | 2828 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 55,941 psi | 88% | 2969 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 98% | 54,389 psi | 85% | 2940 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 82% | 55,376 psi | 87% | 2904 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 54,128 psi | 85% | 2881 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,580 psi | 90% | 2913 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 56,579 psi | 89% | 2894 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 55,941 psi | 88% | 2910 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 90% | 54,723 psi | 86% | 2887 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,926 psi | 86% | 2894 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,246 psi | 90% | 2927 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,071 psi | 86% | 2828 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,537 psi | 90% | 2861 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,521 psi | 89% | 3084 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,795 psi | 86% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,825 psi | 87% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,447 psi | 85% | 2913 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1827 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 58% | 1818 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,421 psi | 90% | 2890 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,318 psi | 88% | 2867 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,043 psi | 89% | 2871 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,883 psi | 88% | 2848 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,346 psi | 85% | 2844 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,463 psi | 88% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,637 psi | 89% | 2890 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,463 psi | 87% | 2867 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 92% | 54,491 psi | 85% | 2953 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 56,724 psi | 89% | 2989 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2805 fps | 97.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,917 psi | 67% | 2776 fps | 97% |
| Lovex S065 | <<locked>> | 82% | 54,360 psi | 85% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 84% | 56,652 psi | 89% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,115 psi | 88% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,114 psi | 86% | 2848 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,433 psi | 85% | 2844 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,391 psi | 88% | 2871 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,868 psi | 86% | 2890 fps | 99.5% |
| Norma 204 | <<locked>> | 86% | 57,406 psi | 90% | 2927 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 44,802 psi | 70% | 2831 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 43,207 psi | 68% | 2802 fps | 99% |
| Norma MRP | <<locked>> | 90% | 56,507 psi | 89% | 2989 fps | 100% |
| Norma MRP | <<locked>> | 90% | 54,926 psi | 86% | 2963 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,753 psi | 87% | 2881 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,708 psi | 86% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,201 psi | 87% | 2976 fps | 99.4% |
| Ramshot Grand | <<locked>> | 94% | 57,667 psi | 90% | 3012 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 54,650 psi | 86% | 2890 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 57,058 psi | 89% | 2923 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,711 psi | 90% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,028 psi | 88% | 2943 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,276 psi | 60% | 1870 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,174 psi | 60% | 1860 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,725 psi | 90% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,304 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,086 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,621 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,493 psi | 90% | 3077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,709 psi | 87% | 3051 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3035 fps | 98.7% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 2999 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 88% | 55,535 psi | 87% | 2877 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 54,447 psi | 85% | 2854 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 57,609 psi | 90% | 2946 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 56,231 psi | 88% | 2923 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 55,709 psi | 87% | 2848 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,665 psi | 86% | 2828 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,360 psi | 85% | 2815 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,652 psi | 89% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,115 psi | 88% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,114 psi | 86% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,913 psi | 89% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,811 psi | 87% | 2802 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,188 psi | 90% | 2943 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,811 psi | 87% | 2920 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 57,145 psi | 90% | 2874 fps | 98.8% |
| Somchem S361 | <<locked>> | 88% | 55,898 psi | 88% | 2848 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 56,652 psi | 89% | 2887 fps | 100% |
| Somchem S365 | <<locked>> | 86% | 55,303 psi | 87% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,244 psi | 85% | 2861 fps | 99.9% |
| Somchem S385 | <<locked>> | 90% | 56,536 psi | 89% | 2894 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,782 psi | 89% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,595 psi | 90% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,333 psi | 88% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,595 psi | 90% | 2897 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 94% | 56,173 psi | 88% | 2874 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 56,681 psi | 89% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 55,492 psi | 87% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,550 psi | 89% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,071 psi | 86% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,144 psi | 88% | 2986 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 90% | 54,650 psi | 86% | 2959 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 96% | 56,449 psi | 88% | 2972 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 54,882 psi | 86% | 2943 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3035 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,695 psi | 87% | 3009 fps | 98.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 3025 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,855 psi | 89% | 2828 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,637 psi | 87% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,579 psi | 87% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,331 psi | 85% | 2884 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,985 psi | 89% | 3022 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,824 psi | 86% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,983 psi | 85% | 2854 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,449 psi | 88% | 2890 fps | 99.7% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,826 psi | 59% | 2546 fps | 98.6% |
| Accurate 3100 | <<locked>> | 80% | 36,869 psi | 58% | 2523 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 50,299 psi | 79% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 49,124 psi | 77% | 2772 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,220 psi | 65% | 2713 fps | 96.2% |
| Accurate High Country | <<locked>> | 80% | 40,045 psi | 63% | 2687 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 84% | 44,730 psi | 70% | 2779 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 84% | 43,613 psi | 68% | 2756 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,785 psi | 65% | 2671 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 40,799 psi | 64% | 2648 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 39,958 psi | 63% | 2664 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 82% | 39,073 psi | 61% | 2638 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 90% | 38,798 psi | 61% | 2635 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 40,451 psi | 63% | 2667 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 30,806 psi | 48% | 2474 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 31,952 psi | 50% | 2507 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,221 psi | 66% | 2674 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,263 psi | 65% | 2651 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,051 psi | 75% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,065 psi | 74% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,829 psi | 66% | 2667 fps | 97.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,886 psi | 64% | 2644 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,739 psi | 59% | 2608 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,811 psi | 58% | 2585 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,564 psi | 57% | 2569 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,549 psi | 56% | 2549 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,531 psi | 49% | 2484 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,719 psi | 48% | 2461 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,567 psi | 64% | 2720 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,175 psi | 61% | 2694 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,676 psi | 79% | 2815 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,676 psi | 78% | 2792 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 35,114 psi | 55% | 2543 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 36,622 psi | 57% | 2579 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 38,247 psi | 60% | 2651 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 37,043 psi | 58% | 2621 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 37,739 psi | 59% | 2608 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 36,811 psi | 58% | 2585 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 52,272 psi | 82% | 2792 fps | 99.7% |
| Bofors RP7 | <<locked>> | 80% | 51,227 psi | 80% | 2769 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 36,985 psi | 58% | 2592 fps | 95.5% |
| Hodgdon H1000 | <<locked>> | 88% | 38,653 psi | 61% | 2631 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 51,721 psi | 81% | 2841 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 50,691 psi | 79% | 2822 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 54,056 psi | 85% | 2858 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 53,040 psi | 83% | 2838 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 42,641 psi | 67% | 2667 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 82% | 41,771 psi | 65% | 2648 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,872 psi | 66% | 2651 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,973 psi | 64% | 2628 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,440 psi | 71% | 2677 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,338 psi | 69% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 35,273 psi | 55% | 2635 fps | 96.1% |
| Hodgdon Retumbo | <<locked>> | 84% | 34,330 psi | 54% | 2605 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 51,866 psi | 81% | 2877 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 80% | 50,546 psi | 79% | 2851 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1631 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,543 psi | 75% | 2726 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 46,572 psi | 73% | 2707 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,592 psi | 84% | 2815 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,591 psi | 82% | 2795 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,747 psi | 75% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,673 psi | 73% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,350 psi | 65% | 2608 fps | 95.6% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,495 psi | 63% | 2585 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 82% | 38,682 psi | 61% | 2641 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 84% | 40,335 psi | 63% | 2677 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,696 psi | 61% | 2680 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,478 psi | 59% | 2651 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 51,242 psi | 80% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 50,198 psi | 79% | 2746 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,472 psi | 78% | 2756 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,631 psi | 76% | 2740 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 32,677 psi | 51% | 2421 fps | 97.2% |
| Lovex S071 | <<locked>> | 80% | 31,850 psi | 50% | 2402 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 48,008 psi | 75% | 2772 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 46,876 psi | 73% | 2749 fps | 98.4% |
| Norma 217 | <<locked>> | 90% | 31,763 psi | 50% | 2523 fps | 95.1% |
| Norma 217 | <<locked>> | 92% | 32,938 psi | 52% | 2556 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,769 psi | 62% | 2680 fps | 98.3% |
| Norma MRP | <<locked>> | 80% | 38,624 psi | 61% | 2654 fps | 97.9% |
| Norma URP | <<locked>> | 80% | 48,979 psi | 77% | 2776 fps | 100% |
| Norma URP | <<locked>> | 80% | 48,066 psi | 75% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,319 psi | 60% | 2648 fps | 95.5% |
| Ramshot Grand | <<locked>> | 82% | 37,289 psi | 58% | 2621 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,935 psi | 75% | 2779 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 46,760 psi | 73% | 2753 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 34,360 psi | 54% | 2530 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 82% | 33,315 psi | 52% | 2503 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 45% | 1673 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 1663 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,372 psi | 79% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,110 psi | 77% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,660 psi | 76% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,224 psi | 74% | 2812 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 32,068 psi | 50% | 2539 fps | 95.8% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 31,125 psi | 49% | 2510 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,814 psi | 66% | 2759 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,555 psi | 68% | 2799 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 43,033 psi | 67% | 2651 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 80% | 42,105 psi | 66% | 2628 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 41,336 psi | 65% | 2654 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,350 psi | 63% | 2631 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 52,272 psi | 82% | 2792 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,227 psi | 80% | 2769 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,242 psi | 80% | 2766 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,198 psi | 79% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,472 psi | 78% | 2756 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,631 psi | 76% | 2740 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,082 psi | 78% | 2717 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,153 psi | 77% | 2697 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,017 psi | 64% | 2651 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,016 psi | 63% | 2628 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 43,874 psi | 69% | 2641 fps | 96.2% |
| Somchem S361 | <<locked>> | 80% | 42,801 psi | 67% | 2615 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 46,325 psi | 73% | 2730 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 45,136 psi | 71% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,785 psi | 65% | 2635 fps | 98.3% |
| Somchem S385 | <<locked>> | 80% | 40,872 psi | 64% | 2615 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 53,388 psi | 84% | 2740 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,430 psi | 79% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,371 psi | 77% | 2749 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,332 psi | 57% | 2510 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 80% | 35,433 psi | 56% | 2487 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,792 psi | 78% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 48,791 psi | 76% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,814 psi | 64% | 2644 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,740 psi | 62% | 2625 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 80% | 39,755 psi | 62% | 2671 fps | 95% |
| Vihtavuori N560 | <<locked>> | 82% | 41,582 psi | 65% | 2710 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 40,263 psi | 63% | 2667 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 39,102 psi | 61% | 2641 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 43,178 psi | 68% | 2776 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 44,846 psi | 70% | 2812 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 50,502 psi | 79% | 2956 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,588 psi | 78% | 2723 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,501 psi | 76% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,909 psi | 81% | 2844 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 50,691 psi | 79% | 2822 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,170 psi | 52% | 2602 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,836 psi | 50% | 2575 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,319 psi | 60% | 2559 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,304 psi | 58% | 2536 fps | 96% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 144 powders for .300 Norma Mag. loaded with the .308 | 190gr | Speer Impact. Hodgdon Retumbo delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,084 fps. ADI AR 2217 gives the best case fill at 100 %, and 144 of the 144 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 190.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2217, ADI AR 2225 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.