Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | RWS Kegelspitz bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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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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% | 57,101 psi | 89% | 3048 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,476 psi | 85% | 3058 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3163 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 57,595 psi | 90% | 3104 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,071 psi | 86% | 3156 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,348 psi | 90% | 3136 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,014 psi | 88% | 3202 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 98% | 53,766 psi | 84% | 3186 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,319 psi | 90% | 3271 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,868 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,071 psi | 86% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,825 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,319 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,535 psi | 87% | 3189 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3251 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3179 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,688 psi | 73% | 3094 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,012 psi | 85% | 3264 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 3166 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 55,898 psi | 88% | 3127 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3251 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 55,071 psi | 86% | 3104 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 84% | 56,217 psi | 88% | 3143 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,363 psi | 90% | 3215 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 56,637 psi | 89% | 3169 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,521 psi | 89% | 3176 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,130 psi | 88% | 3140 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,450 psi | 90% | 3179 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 53,708 psi | 84% | 3182 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 1998 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,696 psi | 90% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,898 psi | 89% | 3120 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,912 psi | 88% | 3097 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 56,202 psi | 88% | 3140 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,652 psi | 89% | 3133 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 55,477 psi | 87% | 3150 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,521 psi | 89% | 3159 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,347 psi | 87% | 3120 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3225 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 57,072 psi | 89% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,029 psi | 89% | 3133 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,868 psi | 86% | 3117 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,500 psi | 74% | 2995 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 54,433 psi | 85% | 3117 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,203 psi | 90% | 3196 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 56,666 psi | 89% | 3281 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 57,421 psi | 90% | 3202 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,288 psi | 87% | 3143 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,608 psi | 87% | 3241 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 56,246 psi | 88% | 3196 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,850 psi | 78% | 3104 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,014 psi | 88% | 3123 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,666 psi | 89% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,071 psi | 86% | 3179 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,450 psi | 90% | 3274 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,890 psi | 72% | 3117 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,448 psi | 87% | 3071 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,927 psi | 88% | 3120 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,682 psi | 90% | 3173 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 54,868 psi | 86% | 3176 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 88% | 55,071 psi | 86% | 3104 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,029 psi | 89% | 3133 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,072 psi | 89% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,868 psi | 86% | 3117 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,566 psi | 90% | 3182 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,594 psi | 89% | 3002 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,637 psi | 89% | 3081 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,389 psi | 85% | 3169 fps | 97.6% |
| Somchem S355 | <<locked>> | 86% | 55,796 psi | 87% | 3117 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 57,000 psi | 89% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,492 psi | 87% | 3150 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 55,883 psi | 88% | 3031 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,173 psi | 88% | 3048 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,203 psi | 90% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,753 psi | 87% | 3136 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3117 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 54,418 psi | 85% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,969 psi | 86% | 3140 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,304 psi | 88% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,782 psi | 89% | 3268 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,521 psi | 87% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,363 psi | 90% | 3215 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,371 psi | 77% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,593 psi | 87% | 3140 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 2495 | <<locked>> | 80% | 53,664 psi | 84% | 2995 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,995 psi | 80% | 2995 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 37,826 psi | 59% | 2789 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,865 psi | 80% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,914 psi | 61% | 2841 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 47,587 psi | 75% | 2966 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 45,963 psi | 72% | 3009 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 50,357 psi | 79% | 3120 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,142 psi | 83% | 3202 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,298 psi | 76% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,488 psi | 81% | 3068 fps | 99.9% |
| Alliant Reloder-16 | 67 gr | 80% | 37,811 psi | 59% | 2854 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,062 psi | 67% | 2989 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,600 psi | 71% | 2999 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,398 psi | 73% | 3054 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,847 psi | 44% | 2575 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,911 psi | 56% | 2828 fps | 95.6% |
| Alliant Reloder-26 | 77.6 gr | 84% | 34,490 psi | 54% | 2831 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 45,556 psi | 71% | 3035 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 48,863 psi | 77% | 3009 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,398 psi | 73% | 3054 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,815 psi | 67% | 2864 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,066 psi | 77% | 3018 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 40,843 psi | 64% | 2890 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,758 psi | 69% | 2920 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,837 psi | 83% | 3110 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,346 psi | 55% | 2736 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,650 psi | 84% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,946 psi | 67% | 2969 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,172 psi | 85% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,067 psi | 78% | 3005 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,344 psi | 82% | 3038 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 40,988 psi | 64% | 2838 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,121 psi | 69% | 2897 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 37,391 psi | 59% | 2789 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 52,837 psi | 83% | 3100 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,967 psi | 81% | 3061 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 51,445 psi | 81% | 3156 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 50,459 psi | 79% | 3005 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,785 psi | 65% | 2844 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 39,987 psi | 63% | 2818 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 36,608 psi | 57% | 2759 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 50,850 psi | 80% | 3054 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,630 psi | 73% | 2999 fps | 95.3% |
| Norma MRP | 80.7 gr | 90% | 42,583 psi | 67% | 3002 fps | 96% |
| Norma URP | <<locked>> | 80% | 38,667 psi | 61% | 2838 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,474 psi | 81% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,619 psi | 81% | 3169 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,550 psi | 59% | 2818 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 42,975 psi | 67% | 2963 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,052 psi | 77% | 2999 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,716 psi | 72% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,783 psi | 61% | 2858 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,536 psi | 59% | 2861 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 42,627 psi | 67% | 3038 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 52,272 psi | 82% | 3018 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,977 psi | 72% | 2949 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,676 psi | 79% | 3048 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 44,744 psi | 70% | 2979 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,815 psi | 67% | 2864 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,785 psi | 65% | 2844 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 50,459 psi | 79% | 3005 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,987 psi | 63% | 2818 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,195 psi | 74% | 3005 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,963 psi | 74% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,857 psi | 64% | 2779 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,338 psi | 69% | 2972 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,253 psi | 72% | 2946 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 35,215 psi | 55% | 2789 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 42,525 psi | 67% | 2897 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 52,533 psi | 82% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,721 psi | 83% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,106 psi | 69% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,972 psi | 63% | 2835 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 44,947 psi | 70% | 2936 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 50,966 psi | 80% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,494 psi | 62% | 2835 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,777 psi | 48% | 2661 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 52,953 psi | 83% | 3199 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,262 psi | 62% | 2805 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,017 psi | 64% | 2894 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,079 psi | 44% | 2667 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,121 psi | 71% | 2946 fps | 95.1% |
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 95 powders for .300 Weath. Mag. loaded with the .308 | 150gr | RWS Kegelspitz. Norma MRP delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,281 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 150.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | RWS Kegelspitz they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.