Load Specifications
Load data in caliber .300 WSM with .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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 2015 | <<locked>> | 86% | 56,652 psi | 89% | 3114 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,129 psi | 86% | 3136 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,288 psi | 87% | 3136 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,506 psi | 87% | 3189 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 55,274 psi | 87% | 3182 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3251 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 88% | 55,695 psi | 87% | 3212 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 56,811 psi | 89% | 3205 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,723 psi | 86% | 3163 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 55,506 psi | 87% | 3146 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,521 psi | 89% | 3284 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,593 psi | 87% | 3333 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,826 psi | 89% | 3235 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,217 psi | 88% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,522 psi | 90% | 3261 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 3255 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,128 psi | 85% | 3301 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2943 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,912 psi | 88% | 3225 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 57,624 psi | 90% | 3251 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,682 psi | 90% | 3209 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,594 psi | 89% | 3150 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,288 psi | 85% | 3192 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,217 psi | 88% | 3301 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 54,708 psi | 86% | 3153 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,056 psi | 86% | 3202 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 96% | 56,217 psi | 88% | 3278 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 56,289 psi | 88% | 3225 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,037 psi | 77% | 3120 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,854 psi | 88% | 3258 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 55,622 psi | 87% | 3281 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 55% | 1988 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,333 psi | 88% | 3205 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 54,433 psi | 85% | 3189 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,390 psi | 87% | 3176 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,100 psi | 86% | 3140 fps | 96.4% |
| IMR 4198 | <<locked>> | 82% | 56,086 psi | 88% | 3081 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,217 psi | 88% | 3186 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 3071 fps | 97.4% |
| IMR 4895 | <<locked>> | 90% | 55,419 psi | 87% | 3238 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 54,723 psi | 86% | 3163 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 54,998 psi | 86% | 3146 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,506 psi | 87% | 3189 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,535 psi | 87% | 3136 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 56,057 psi | 88% | 3189 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,419 psi | 87% | 3179 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3212 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 54,563 psi | 86% | 3156 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 54,955 psi | 86% | 3159 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,681 psi | 89% | 3245 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 53,969 psi | 85% | 3238 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 57,464 psi | 90% | 3271 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,084 psi | 83% | 3225 fps | 97.1% |
| Ramshot TAC | <<locked>> | 86% | 55,376 psi | 87% | 3173 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,839 psi | 86% | 3196 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,869 psi | 88% | 3163 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,650 psi | 56% | 2034 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,389 psi | 85% | 3146 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,492 psi | 87% | 3179 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,259 psi | 85% | 3271 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,838 psi | 84% | 3304 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 3274 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3301 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 86% | 55,448 psi | 87% | 3146 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,056 psi | 86% | 3153 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 57,174 psi | 90% | 3238 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 57,682 psi | 90% | 3209 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,419 psi | 87% | 3179 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,506 psi | 87% | 3189 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,057 psi | 88% | 3189 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3212 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,696 psi | 90% | 3169 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,448 psi | 87% | 3245 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,072 psi | 89% | 3150 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,609 psi | 90% | 3212 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,360 psi | 85% | 3179 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,217 psi | 88% | 3100 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,376 psi | 88% | 3091 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,912 psi | 88% | 3123 fps | 96.5% |
| Somchem S321 | <<locked>> | 84% | 56,188 psi | 88% | 3199 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,477 psi | 87% | 3094 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,072 psi | 89% | 3202 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 57,537 psi | 90% | 3235 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,370 psi | 76% | 3179 fps | 99.9% |
| Unknown powder | <<locked>> | 98% | 55,259 psi | 87% | 3248 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 84% | 54,752 psi | 86% | 3051 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,593 psi | 87% | 3077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,549 psi | 85% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,752 psi | 86% | 3127 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3159 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,927 psi | 88% | 3219 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 54,375 psi | 85% | 3169 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 54,476 psi | 85% | 3153 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,202 psi | 88% | 3271 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,872 psi | 64% | 3028 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3215 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,854 psi | 88% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,217 psi | 88% | 3278 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,651 psi | 87% | 3212 fps | 99.8% |
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 2015 | <<locked>> | 80% | 47,050 psi | 74% | 2963 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,445 psi | 81% | 3077 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,668 psi | 62% | 2864 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,165 psi | 71% | 3012 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 37,478 psi | 59% | 2848 fps | 99.5% |
| Accurate 4350 | <<locked>> | 90% | 38,769 psi | 61% | 2930 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 43,250 psi | 68% | 2972 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,854 psi | 58% | 2805 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,310 psi | 71% | 2989 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 45,368 psi | 71% | 2992 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,881 psi | 83% | 3219 fps | 99.6% |
| Alliant Power Pro 2000-MR | 60 gr | 80% | 39,305 psi | 62% | 2982 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,289 psi | 57% | 2825 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,678 psi | 83% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,001 psi | 61% | 2894 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 90% | 38,653 psi | 61% | 2943 fps | 95.2% |
| Alliant Reloder-17 | 62 gr | 84% | 35,882 psi | 56% | 2897 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 98% | 35,462 psi | 56% | 2877 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,482 psi | 67% | 2969 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 35,853 psi | 56% | 2825 fps | 96.8% |
| Bofors RP7 | <<locked>> | 96% | 54,143 psi | 85% | 3146 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,224 psi | 74% | 2986 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,179 psi | 69% | 3009 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,631 psi | 76% | 3163 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 48,138 psi | 75% | 3045 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 42,105 psi | 66% | 2949 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 48,878 psi | 77% | 3143 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,613 psi | 68% | 2986 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 33,228 psi | 52% | 2762 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,246 psi | 58% | 2887 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 96% | 51,576 psi | 81% | 3205 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,208 psi | 41% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,870 psi | 61% | 2861 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 39,378 psi | 62% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,042 psi | 56% | 2779 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 92% | 51,793 psi | 81% | 3081 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 52,765 psi | 83% | 3031 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,647 psi | 78% | 3068 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 38,116 psi | 60% | 2897 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,929 psi | 63% | 2930 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 45,310 psi | 71% | 2989 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 51,372 psi | 81% | 3087 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,235 psi | 66% | 2949 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 43,453 psi | 68% | 2913 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 38,508 psi | 60% | 2851 fps | 97.9% |
| Lovex S065 | <<locked>> | 90% | 43,250 psi | 68% | 2946 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 49,530 psi | 78% | 3091 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,424 psi | 66% | 2927 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 42,670 psi | 67% | 2940 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 38,421 psi | 60% | 2881 fps | 96.5% |
| Norma URP | <<locked>> | 90% | 38,914 psi | 61% | 2930 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,971 psi | 60% | 2887 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 96% | 46,499 psi | 73% | 3100 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,310 psi | 71% | 2982 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,831 psi | 70% | 3009 fps | 98.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,008 psi | 77% | 3041 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 41% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,807 psi | 80% | 3087 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,486 psi | 76% | 3054 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,712 psi | 64% | 2999 fps | 96.5% |
| ReloadSwiss RS 60 | 59.1 gr | 80% | 33,460 psi | 52% | 2844 fps | 97.6% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 41,350 psi | 65% | 3012 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,556 psi | 70% | 3091 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 46,311 psi | 73% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,350 psi | 63% | 2871 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,721 psi | 53% | 2759 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 54,143 psi | 85% | 3146 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,250 psi | 68% | 2946 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,235 psi | 66% | 2949 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 38,508 psi | 60% | 2851 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 96% | 49,530 psi | 78% | 3091 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,853 psi | 84% | 3107 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,664 psi | 54% | 2808 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,664 psi | 84% | 3097 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,526 psi | 68% | 2953 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,727 psi | 65% | 2933 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,859 psi | 69% | 2887 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,405 psi | 57% | 2733 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,008 psi | 77% | 3005 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,110 psi | 77% | 3077 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 43,453 psi | 68% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,265 psi | 68% | 2953 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 34,664 psi | 54% | 2772 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 30,487 psi | 48% | 2743 fps | 95.4% |
| Unknown powder | <<locked>> | 90% | 42,482 psi | 67% | 3002 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,385 psi | 76% | 2949 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,118 psi | 64% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,711 psi | 62% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,813 psi | 62% | 2858 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,457 psi | 46% | 2608 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 88% | 39,813 psi | 62% | 2910 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 47,718 psi | 75% | 3051 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 39,479 psi | 62% | 2874 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 40,306 psi | 63% | 2959 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 38,232 psi | 60% | 2966 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 33,518 psi | 53% | 2726 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 48,588 psi | 76% | 3100 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 48,878 psi | 77% | 3143 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,735 psi | 81% | 3143 fps | 99.5% |
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 113 powders for .300 WSM loaded with the .308 | 135gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,333 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, 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 4350, ADI AR 2209 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 WSM 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 3100, ADI AR 2209, Alliant Reloder-19 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.