Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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>> | 84% | 56,478 psi | 89% | 3186 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,840 psi | 88% | 3192 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3209 fps | 98.2% |
| Accurate 4064 | <<locked>> | 86% | 56,840 psi | 89% | 3241 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,114 psi | 85% | 3281 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 82% | 55,854 psi | 88% | 3271 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,087 psi | 89% | 3274 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,390 psi | 87% | 3317 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,492 psi | 89% | 3406 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,288 psi | 85% | 3245 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,520 psi | 85% | 3261 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,795 psi | 86% | 3346 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,144 psi | 88% | 3379 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,505 psi | 85% | 3301 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3235 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,656 psi | 67% | 3120 fps | 96.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3448 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,869 psi | 88% | 3281 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 55,129 psi | 86% | 3258 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 54,650 psi | 86% | 3225 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 86% | 55,651 psi | 87% | 3271 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 92% | 56,347 psi | 88% | 3333 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 90% | 56,159 psi | 88% | 3291 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 56,492 psi | 89% | 3284 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,056 psi | 86% | 3264 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,855 psi | 89% | 3317 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,174 psi | 90% | 3376 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 57% | 2090 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,638 psi | 90% | 3284 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,985 psi | 89% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,579 psi | 89% | 3258 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,782 psi | 87% | 3232 fps | 98% |
| IMR 4350 | <<locked>> | 94% | 55,767 psi | 87% | 3264 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,318 psi | 88% | 3261 fps | 98% |
| IMR 4831 | <<locked>> | 94% | 54,650 psi | 86% | 3274 fps | 99.6% |
| IMR 4895 | <<locked>> | 84% | 55,970 psi | 88% | 3297 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,289 psi | 88% | 3241 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,766 psi | 86% | 3189 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,652 psi | 89% | 3251 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,536 psi | 89% | 3261 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 57,740 psi | 90% | 3304 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,120 psi | 68% | 3035 fps | 96.2% |
| Norma 201 | <<locked>> | 82% | 54,621 psi | 86% | 3212 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,158 psi | 86% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,377 psi | 90% | 3310 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,565 psi | 89% | 3314 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3392 fps | 98% |
| Norma URP | <<locked>> | 94% | 56,420 psi | 88% | 3327 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 84% | 54,650 psi | 86% | 3274 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 55,361 psi | 87% | 3320 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 58% | 2139 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,680 psi | 87% | 3251 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,463 psi | 87% | 3340 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,637 psi | 87% | 3376 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,099 psi | 85% | 3304 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,652 psi | 89% | 3399 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,187 psi | 86% | 3212 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,172 psi | 86% | 3255 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3353 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 90% | 54,650 psi | 86% | 3225 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,536 psi | 89% | 3261 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,289 psi | 88% | 3241 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,652 psi | 89% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,740 psi | 90% | 3304 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,942 psi | 89% | 3317 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,319 psi | 90% | 3271 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,404 psi | 85% | 3235 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,448 psi | 87% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,304 psi | 88% | 3140 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,260 psi | 88% | 3205 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3346 fps | 97% |
| Somchem S335 | <<locked>> | 82% | 55,230 psi | 87% | 3140 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,898 psi | 89% | 3258 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,201 psi | 87% | 3248 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,738 psi | 87% | 3333 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,433 psi | 85% | 3258 fps | 97.3% |
| Unknown powder | <<locked>> | 92% | 57,145 psi | 90% | 3333 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,941 psi | 88% | 3130 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,463 psi | 87% | 3176 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,840 psi | 88% | 3189 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,652 psi | 89% | 3225 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,071 psi | 86% | 3264 fps | 99.6% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 3163 fps | 96% |
| Vihtavuori N540 | <<locked>> | 86% | 57,725 psi | 90% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,259 psi | 85% | 3264 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3327 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,013 psi | 86% | 3232 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,594 psi | 89% | 3340 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,092 psi | 69% | 3271 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,491 psi | 85% | 3241 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3255 fps | 96.3% |
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% | 49,617 psi | 78% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 45,861 psi | 72% | 3002 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 42,264 psi | 66% | 3015 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 46,934 psi | 74% | 3077 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,505 psi | 56% | 2881 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,460 psi | 82% | 3209 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 44,541 psi | 70% | 3035 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 51,837 psi | 81% | 3251 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,037 psi | 77% | 3264 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,904 psi | 70% | 3064 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,008 psi | 75% | 3140 fps | 99.2% |
| Alliant Reloder-16 | 66.9 gr | 80% | 34,838 psi | 55% | 2894 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,363 psi | 62% | 3038 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,082 psi | 80% | 3235 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,850 psi | 48% | 2785 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 98% | 40,001 psi | 63% | 3051 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 36,042 psi | 56% | 2989 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,286 psi | 82% | 3215 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 45,063 psi | 71% | 3071 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 45,281 psi | 71% | 3041 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 45,600 psi | 71% | 3077 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 84% | 43,105 psi | 68% | 3068 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 49,284 psi | 77% | 3159 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 53,011 psi | 83% | 3222 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,227 psi | 51% | 2776 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,574 psi | 78% | 3192 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 45,774 psi | 72% | 3153 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 42% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,734 psi | 80% | 3166 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 53,519 psi | 84% | 3212 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,833 psi | 73% | 3081 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,023 psi | 77% | 3104 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 45,948 psi | 72% | 3071 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,005 psi | 69% | 3015 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 36,564 psi | 57% | 2890 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 49,211 psi | 77% | 3176 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 52,721 psi | 83% | 3186 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,416 psi | 81% | 3133 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 46,963 psi | 74% | 3081 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 38,769 psi | 61% | 2894 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 44,817 psi | 70% | 3051 fps | 95.8% |
| Lovex S071 | <<locked>> | 98% | 40,437 psi | 63% | 2972 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,271 psi | 80% | 3153 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,909 psi | 81% | 3156 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,355 psi | 74% | 3127 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 52,939 psi | 83% | 3248 fps | 95.7% |
| Norma MRP | <<locked>> | 94% | 44,585 psi | 70% | 3173 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,375 psi | 55% | 2877 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,718 psi | 75% | 3146 fps | 99.4% |
| Ramshot Hunter | 76.2 gr | 86% | 42,177 psi | 66% | 3051 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 43% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,585 psi | 71% | 3054 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,663 psi | 81% | 3271 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,858 psi | 66% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,956 psi | 59% | 2963 fps | 95.9% |
| ReloadSwiss RS 70 | 76.8 gr | 84% | 39,711 psi | 62% | 3035 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 48,747 psi | 76% | 3097 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 42,366 psi | 66% | 3009 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 96% | 50,212 psi | 79% | 3219 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 45,281 psi | 71% | 3041 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,769 psi | 61% | 2894 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,721 psi | 83% | 3186 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,963 psi | 74% | 3081 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,817 psi | 70% | 3051 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,497 psi | 68% | 3061 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,534 psi | 84% | 3205 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,923 psi | 80% | 3173 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,938 psi | 81% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,801 psi | 69% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 43,395 psi | 68% | 2956 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,763 psi | 78% | 3212 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,851 psi | 81% | 3087 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,200 psi | 83% | 3192 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 42,830 psi | 67% | 3012 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 31,879 psi | 50% | 2822 fps | 97.5% |
| Somchem S385 | <<locked>> | 94% | 47,732 psi | 75% | 3133 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 38,276 psi | 60% | 2946 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,446 psi | 82% | 3074 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,762 psi | 76% | 3068 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,139 psi | 77% | 3077 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,814 psi | 64% | 2933 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 36,840 psi | 58% | 2884 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 98% | 46,920 psi | 74% | 3100 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 47,630 psi | 75% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,405 psi | 57% | 2881 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 34,113 psi | 53% | 2877 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,245 psi | 57% | 2851 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 43,221 psi | 68% | 3071 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,357 psi | 49% | 2890 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,908 psi | 80% | 3179 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,879 psi | 80% | 3182 fps | 95.3% |
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 107 powders for .300 Weath. Mag. loaded with the .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,448 fps; across all powders the maximum-charge window runs from 2,090 fps to 3,448 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 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 135.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for .300 Weath. Mag. with the .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.