Load Specifications
Load data in caliber .300 WSM with .308 | 155gr | Frontier RSBT bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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 2015 | <<locked>> | 84% | 54,317 psi | 85% | 2864 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,420 psi | 88% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,463 psi | 88% | 2933 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,724 psi | 89% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,884 psi | 89% | 2933 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 56,420 psi | 88% | 2982 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3068 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 56,956 psi | 89% | 3015 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 54,447 psi | 85% | 2959 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,956 psi | 88% | 2966 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,811 psi | 89% | 2940 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,782 psi | 89% | 3140 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,389 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,305 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,042 psi | 86% | 3005 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 3064 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,143 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,624 psi | 61% | 2785 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,917 psi | 67% | 2940 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,768 psi | 89% | 3028 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 54,897 psi | 86% | 2999 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,143 psi | 86% | 2963 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,551 psi | 90% | 2946 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,259 psi | 87% | 2995 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,377 psi | 90% | 3100 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,869 psi | 88% | 2949 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,144 psi | 88% | 3012 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 57,377 psi | 90% | 3087 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 54,244 psi | 85% | 2986 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 57,551 psi | 90% | 3028 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2940 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,000 psi | 89% | 3061 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,594 psi | 89% | 3097 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 56% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,450 psi | 90% | 3009 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,811 psi | 87% | 2986 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,507 psi | 89% | 2982 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,043 psi | 88% | 2953 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 57,087 psi | 89% | 2867 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2986 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,072 psi | 89% | 2995 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,137 psi | 74% | 2897 fps | 98.5% |
| IMR 4895 | <<locked>> | 90% | 56,449 psi | 88% | 3038 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 55,956 psi | 88% | 2966 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,289 psi | 88% | 2953 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,724 psi | 89% | 2992 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,362 psi | 88% | 2940 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 57,276 psi | 90% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,420 psi | 88% | 2989 fps | 98.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3028 fps | 98% |
| Norma 201 | <<locked>> | 88% | 55,492 psi | 87% | 2956 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,275 psi | 88% | 2963 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,244 psi | 85% | 2992 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3051 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 54,795 psi | 86% | 3018 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,114 psi | 85% | 3045 fps | 98.1% |
| Ramshot TAC | <<locked>> | 86% | 56,434 psi | 88% | 2986 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,869 psi | 88% | 3002 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,014 psi | 89% | 2969 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1873 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,259 psi | 87% | 2943 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,463 psi | 88% | 2992 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,535 psi | 87% | 3077 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,027 psi | 86% | 3110 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3087 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,796 psi | 87% | 3117 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 56,594 psi | 89% | 2943 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,144 psi | 88% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,766 psi | 86% | 2989 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,143 psi | 86% | 2963 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,420 psi | 88% | 2989 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,724 psi | 89% | 2992 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,276 psi | 90% | 2992 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3028 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,753 psi | 89% | 3054 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,824 psi | 86% | 2963 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,477 psi | 87% | 2986 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,261 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,464 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,898 psi | 89% | 2940 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 57,203 psi | 90% | 2999 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,420 psi | 88% | 2894 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,172 psi | 85% | 2949 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 55,288 psi | 87% | 2989 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 2995 fps | 100% |
| Unknown powder | <<locked>> | 98% | 56,434 psi | 88% | 3061 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 55,666 psi | 87% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,550 psi | 89% | 2874 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,753 psi | 87% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,724 psi | 87% | 2927 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,116 psi | 90% | 3031 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 55,637 psi | 87% | 2972 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,550 psi | 87% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,348 psi | 90% | 3081 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,003 psi | 66% | 2864 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,737 psi | 86% | 2972 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,985 psi | 89% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,377 psi | 90% | 3087 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,505 psi | 54% | 2769 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,652 psi | 89% | 3015 fps | 100% |
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% | 47,921 psi | 75% | 2766 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,634 psi | 82% | 2884 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,828 psi | 64% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,122 psi | 72% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,951 psi | 78% | 2818 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 38,580 psi | 60% | 2680 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,086 psi | 58% | 2710 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 44,237 psi | 69% | 2795 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 37,666 psi | 59% | 2638 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,325 psi | 73% | 2805 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 46,514 psi | 73% | 2795 fps | 100% |
| Alliant Power Pro 2000-MR | 55.3 gr | 80% | 40,219 psi | 63% | 2818 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,318 psi | 58% | 2661 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,954 psi | 85% | 2867 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,987 psi | 63% | 2726 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,159 psi | 58% | 2720 fps | 95.9% |
| Alliant Reloder-17 | 54.4 gr | 80% | 32,068 psi | 50% | 2615 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,097 psi | 50% | 2615 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,463 psi | 59% | 2808 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,337 psi | 68% | 2795 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 36,927 psi | 58% | 2664 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 48,762 psi | 76% | 2854 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,022 psi | 75% | 2795 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,194 psi | 71% | 2828 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,879 psi | 78% | 2976 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 49,226 psi | 77% | 2848 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,637 psi | 59% | 2664 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 90% | 46,760 psi | 73% | 2907 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 50,908 psi | 80% | 2930 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,643 psi | 70% | 2808 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,082 psi | 50% | 2556 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,218 psi | 60% | 2720 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 94% | 48,892 psi | 77% | 2963 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 41% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,697 psi | 62% | 2690 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,538 psi | 64% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,840 psi | 58% | 2612 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,934 psi | 74% | 2792 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 53,766 psi | 84% | 2822 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 48,791 psi | 76% | 2877 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,601 psi | 75% | 2835 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 36,724 psi | 58% | 2684 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,944 psi | 64% | 2756 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,325 psi | 73% | 2805 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 52,547 psi | 82% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,410 psi | 68% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,324 psi | 69% | 2733 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 39,421 psi | 62% | 2680 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 41,408 psi | 65% | 2717 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 44,614 psi | 70% | 2802 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,424 psi | 68% | 2749 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 43,729 psi | 69% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,349 psi | 62% | 2713 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 37,347 psi | 59% | 2710 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 38,914 psi | 61% | 2723 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 41,553 psi | 65% | 2805 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 46,325 psi | 73% | 2808 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,847 psi | 72% | 2831 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,995 psi | 78% | 2858 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 42% | 1673 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,880 psi | 81% | 2894 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,555 psi | 68% | 2762 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,989 psi | 66% | 2831 fps | 97.9% |
| ReloadSwiss RS 60 | 54.4 gr | 80% | 34,142 psi | 54% | 2687 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,796 psi | 58% | 2723 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,624 psi | 62% | 2795 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 47,297 psi | 74% | 2795 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,220 psi | 65% | 2697 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 34,592 psi | 54% | 2602 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 48,762 psi | 76% | 2854 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,408 psi | 65% | 2717 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,410 psi | 68% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,421 psi | 62% | 2680 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 44,614 psi | 70% | 2802 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,621 psi | 56% | 2654 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,585 psi | 70% | 2782 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,743 psi | 67% | 2762 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,788 psi | 70% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,217 psi | 58% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 46,760 psi | 73% | 2776 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 50,009 psi | 78% | 2884 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,382 psi | 70% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,164 psi | 69% | 2776 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 35,578 psi | 56% | 2612 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 27,470 psi | 43% | 2480 fps | 95.2% |
| Unknown powder | <<locked>> | 86% | 38,072 psi | 60% | 2713 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 49,429 psi | 77% | 2753 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,134 psi | 66% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,741 psi | 64% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,799 psi | 64% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,356 psi | 48% | 2464 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 84% | 35,665 psi | 56% | 2631 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 48,820 psi | 77% | 2861 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,495 psi | 63% | 2700 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 36,172 psi | 57% | 2677 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 34,476 psi | 54% | 2694 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,950 psi | 47% | 2461 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 49,588 psi | 78% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,760 psi | 73% | 2907 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,401 psi | 51% | 2703 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,620 psi | 82% | 2953 fps | 99.9% |
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 118 powders for .300 WSM loaded with the .308 | 155gr | Frontier RSBT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,140 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:10.5 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .300 WSM with the .308 | 155gr | Frontier RSBT 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.