Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 155gr | Norma Kalahari bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-17 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.
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 2495 | <<locked>> | 82% | 55,782 psi | 87% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,826 psi | 89% | 3041 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 3081 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,202 psi | 88% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,217 psi | 90% | 3140 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,028 psi | 88% | 3061 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,375 psi | 85% | 3120 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3173 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,535 psi | 87% | 3189 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,898 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,072 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,740 psi | 90% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,376 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,464 psi | 90% | 3169 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3166 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,049 psi | 71% | 3012 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,840 psi | 88% | 3248 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,096 psi | 79% | 3081 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 54,302 psi | 85% | 3048 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3166 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 57,261 psi | 90% | 3087 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,563 psi | 86% | 3061 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 55,622 psi | 87% | 3133 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 55,216 psi | 87% | 3091 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,476 psi | 85% | 3061 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,883 psi | 88% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,912 psi | 88% | 3169 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 57% | 1942 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,492 psi | 89% | 3064 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,463 psi | 87% | 3041 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,650 psi | 86% | 3022 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 54,824 psi | 86% | 3064 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,448 psi | 87% | 3058 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 57,493 psi | 90% | 3127 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,998 psi | 86% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,319 psi | 90% | 3104 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,971 psi | 89% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,796 psi | 87% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,390 psi | 87% | 3051 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 56,971 psi | 89% | 3100 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,788 psi | 72% | 2920 fps | 98% |
| Norma 201 | <<locked>> | 82% | 57,116 psi | 90% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,711 psi | 90% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,362 psi | 88% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,492 psi | 87% | 3110 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 54,520 psi | 85% | 3196 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 55,753 psi | 87% | 3123 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,377 psi | 90% | 3120 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3156 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,491 psi | 85% | 3117 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,834 psi | 75% | 3015 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1991 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,549 psi | 85% | 3045 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,824 psi | 86% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,159 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,564 psi | 87% | 3192 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,063 psi | 69% | 3025 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 54,273 psi | 85% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,404 psi | 85% | 3045 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,014 psi | 88% | 3087 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 56,768 psi | 89% | 3153 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 57,261 psi | 90% | 3087 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,390 psi | 87% | 3051 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 55,796 psi | 87% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,971 psi | 89% | 3100 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,057 psi | 88% | 3107 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,869 psi | 89% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,405 psi | 87% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,172 psi | 86% | 3005 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,275 psi | 88% | 3150 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 57,566 psi | 90% | 2976 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,447 psi | 85% | 3041 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,129 psi | 86% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,508 psi | 90% | 3130 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 54,694 psi | 86% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,897 psi | 86% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,593 psi | 87% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,099 psi | 85% | 3058 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,982 psi | 83% | 3038 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 56,521 psi | 89% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,971 psi | 89% | 3120 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,172 psi | 85% | 3127 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,740 psi | 90% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,622 psi | 87% | 3133 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,934 psi | 74% | 3156 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,217 psi | 90% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,795 psi | 84% | 3058 fps | 97.3% |
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 2495 | <<locked>> | 80% | 52,272 psi | 82% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,835 psi | 78% | 2920 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 36,492 psi | 57% | 2717 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,530 psi | 78% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,797 psi | 59% | 2769 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 46,630 psi | 73% | 2894 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 47,732 psi | 75% | 2992 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,257 psi | 82% | 3107 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,590 psi | 81% | 3120 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,123 psi | 74% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,357 psi | 79% | 2995 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,782 psi | 58% | 2782 fps | 97.6% |
| Alliant Reloder-17 | 68.6 gr | 80% | 41,756 psi | 65% | 2917 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,282 psi | 74% | 2982 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,802 psi | 70% | 2976 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,819 psi | 45% | 2569 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,838 psi | 55% | 2756 fps | 95.1% |
| Alliant Reloder-26 | 73.8 gr | 84% | 33,257 psi | 52% | 2756 fps | 95.3% |
| Bofors RP15 | <<locked>> | 98% | 46,934 psi | 74% | 3018 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,543 psi | 75% | 2933 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,802 psi | 70% | 2976 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,800 psi | 66% | 2792 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 47,863 psi | 75% | 2943 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,740 psi | 62% | 2818 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 45,426 psi | 71% | 2904 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,200 psi | 54% | 2664 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,257 psi | 82% | 3045 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,669 psi | 65% | 2894 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 43% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,040 psi | 83% | 3012 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,052 psi | 77% | 2933 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,213 psi | 80% | 2959 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 42,583 psi | 67% | 2828 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,163 psi | 68% | 2822 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 36,216 psi | 57% | 2717 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 51,648 psi | 81% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,882 psi | 84% | 3041 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,563 psi | 84% | 2976 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,255 psi | 77% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,756 psi | 64% | 2772 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 38,972 psi | 61% | 2746 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 37,579 psi | 59% | 2743 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,664 psi | 84% | 2999 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,230 psi | 85% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,734 psi | 78% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,339 psi | 71% | 2920 fps | 95% |
| Norma MRP | 76.7 gr | 90% | 40,988 psi | 64% | 2923 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,565 psi | 59% | 2766 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,009 psi | 78% | 2999 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,951 psi | 78% | 3087 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,405 psi | 57% | 2743 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 44,440 psi | 70% | 2946 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,834 psi | 75% | 2923 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,367 psi | 70% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,521 psi | 59% | 2785 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,390 psi | 57% | 2785 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,133 psi | 64% | 2953 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 50,952 psi | 80% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,802 psi | 70% | 2877 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,298 psi | 77% | 2969 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 46,340 psi | 73% | 2966 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 41,800 psi | 66% | 2792 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,756 psi | 64% | 2772 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 49,255 psi | 77% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,972 psi | 61% | 2746 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,847 psi | 72% | 2930 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,301 psi | 84% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,876 psi | 72% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,813 psi | 62% | 2710 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,919 psi | 72% | 2959 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 54,143 psi | 85% | 2927 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,078 psi | 71% | 2877 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 33,953 psi | 53% | 2717 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 41,292 psi | 65% | 2825 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 51,227 psi | 80% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,561 psi | 81% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,033 psi | 67% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,957 psi | 61% | 2766 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 43,352 psi | 68% | 2858 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 49,821 psi | 78% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,435 psi | 60% | 2762 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 80% | 29,718 psi | 47% | 2592 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,058 psi | 60% | 2733 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 39,900 psi | 63% | 2822 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,209 psi | 43% | 2595 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,388 psi | 84% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,804 psi | 73% | 2933 fps | 95.6% |
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 88 powders for .300 Weath. Mag. loaded with the .308 | 155gr | Norma Kalahari. Alliant Reloder-26 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,248 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Alliant Reloder-26, Alliant Reloder-17, Norma MRP rank at the top here: for .300 Weath. Mag. with the .308 | 155gr | Norma Kalahari 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.