Load Specifications
Load data in caliber .300 WSM with .3085 | 150gr | Prvi Partizan FMJ bullet and 96 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, Hodgdon Superformance 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>> | 84% | 55,666 psi | 87% | 2943 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,447 psi | 85% | 2963 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,246 psi | 88% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,319 psi | 90% | 3015 fps | 97% |
| Accurate 4064 | <<locked>> | 90% | 54,650 psi | 86% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,549 psi | 85% | 3097 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,882 psi | 86% | 3045 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 55,840 psi | 88% | 3041 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,348 psi | 90% | 3048 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,549 psi | 85% | 2969 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,607 psi | 86% | 3166 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,115 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,507 psi | 89% | 3091 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 3156 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,029 psi | 89% | 3196 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,929 psi | 63% | 2867 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,759 psi | 70% | 3035 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,853 psi | 86% | 3061 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 56,869 psi | 89% | 3087 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,681 psi | 89% | 3048 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,419 psi | 87% | 2976 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,927 psi | 89% | 3077 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,129 psi | 86% | 3127 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 54,186 psi | 85% | 3041 fps | 99% |
| Hodgdon H414 | <<locked>> | 98% | 57,334 psi | 90% | 3146 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 94% | 54,447 psi | 85% | 3051 fps | 96% |
| Hodgdon H4895 | <<locked>> | 86% | 55,492 psi | 87% | 3058 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,793 psi | 81% | 3022 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,868 psi | 86% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,491 psi | 85% | 3123 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 56% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,768 psi | 89% | 3061 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,390 psi | 87% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,361 psi | 87% | 3025 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,245 psi | 87% | 3002 fps | 97.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3074 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,201 psi | 87% | 3028 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,998 psi | 86% | 3084 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,607 psi | 86% | 3068 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 57,348 psi | 90% | 3048 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,682 psi | 90% | 3031 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,752 psi | 86% | 3022 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,667 psi | 90% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,419 psi | 87% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,607 psi | 86% | 3022 fps | 98.4% |
| Lovex S070 | <<locked>> | 98% | 55,593 psi | 87% | 3058 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 56,942 psi | 89% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,711 psi | 90% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,738 psi | 87% | 3077 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3136 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 56,434 psi | 88% | 3100 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3133 fps | 98.4% |
| Ramshot TAC | <<locked>> | 84% | 54,070 psi | 85% | 3005 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,435 psi | 90% | 3084 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,607 psi | 86% | 2992 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,013 psi | 56% | 1926 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,855 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,404 psi | 85% | 3018 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,174 psi | 90% | 3159 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,826 psi | 89% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,201 psi | 85% | 3114 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3205 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 54,723 psi | 86% | 2976 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,522 psi | 90% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,724 psi | 89% | 3077 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,681 psi | 89% | 3048 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,607 psi | 86% | 3022 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,752 psi | 86% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,419 psi | 87% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,593 psi | 87% | 3058 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,665 psi | 86% | 3081 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,376 psi | 88% | 3045 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,826 psi | 89% | 3068 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,085 psi | 86% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,463 psi | 87% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,027 psi | 86% | 2972 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 55,042 psi | 86% | 3025 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,462 psi | 85% | 2927 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,912 psi | 88% | 3035 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,898 psi | 89% | 3074 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 3084 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,723 psi | 86% | 2890 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,332 psi | 87% | 2913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,406 psi | 90% | 3002 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,708 psi | 86% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,911 psi | 86% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,043 psi | 88% | 3081 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 54,201 psi | 85% | 2992 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,550 psi | 89% | 3015 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,969 psi | 86% | 3081 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,685 psi | 68% | 2949 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,521 psi | 89% | 3058 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,273 psi | 85% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,609 psi | 90% | 3150 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,752 psi | 56% | 2861 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,826 psi | 89% | 3077 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% | 49,211 psi | 77% | 2848 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,989 psi | 66% | 2762 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,226 psi | 77% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,169 psi | 79% | 2897 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,711 psi | 62% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,882 psi | 56% | 2730 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 45,426 psi | 71% | 2877 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,595 psi | 60% | 2713 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,456 psi | 74% | 2887 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,863 psi | 75% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | 58.3 gr | 80% | 41,466 psi | 65% | 2904 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,276 psi | 60% | 2736 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,147 psi | 64% | 2805 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,955 psi | 56% | 2743 fps | 95.4% |
| Alliant Reloder-17 | 57.4 gr | 80% | 33,156 psi | 52% | 2694 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,067 psi | 49% | 2631 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,682 psi | 61% | 2894 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,585 psi | 70% | 2874 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 38,043 psi | 60% | 2740 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 50,009 psi | 78% | 2933 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,255 psi | 77% | 2874 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,586 psi | 73% | 2907 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,343 psi | 80% | 3061 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,841 psi | 61% | 2743 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 46,905 psi | 74% | 2963 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 92% | 51,039 psi | 80% | 2992 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 45,861 psi | 72% | 2887 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,893 psi | 48% | 2572 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,843 psi | 66% | 2854 fps | 99.1% |
| Hodgdon Superformance | 69.7 gr | 92% | 47,050 psi | 74% | 2986 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,947 psi | 69% | 2835 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 45,469 psi | 71% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,538 psi | 64% | 2749 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,832 psi | 72% | 2828 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,224 psi | 74% | 2904 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,774 psi | 72% | 2858 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 37,115 psi | 58% | 2743 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 42,134 psi | 66% | 2838 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,456 psi | 74% | 2887 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 54,012 psi | 85% | 2979 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,788 psi | 70% | 2858 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,295 psi | 71% | 2808 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 40,495 psi | 63% | 2756 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 40,074 psi | 63% | 2743 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 45,992 psi | 72% | 2884 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,469 psi | 70% | 2828 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,831 psi | 70% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,495 psi | 63% | 2792 fps | 98% |
| Norma URP | <<locked>> | 86% | 36,013 psi | 56% | 2730 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,147 psi | 63% | 2805 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 42,873 psi | 67% | 2890 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 47,500 psi | 74% | 2890 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,949 psi | 74% | 2910 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,271 psi | 80% | 2936 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 42% | 1722 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,272 psi | 83% | 2976 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,643 psi | 70% | 2841 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,453 psi | 68% | 2917 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,288 psi | 55% | 2769 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,116 psi | 60% | 2805 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,814 psi | 64% | 2877 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 48,530 psi | 76% | 2874 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,264 psi | 66% | 2772 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 35,752 psi | 56% | 2680 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 50,009 psi | 78% | 2933 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,074 psi | 63% | 2743 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,788 psi | 70% | 2858 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,495 psi | 63% | 2756 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 45,992 psi | 72% | 2884 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,738 psi | 58% | 2733 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,876 psi | 72% | 2864 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,961 psi | 69% | 2841 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,730 psi | 72% | 2779 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,101 psi | 60% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,194 psi | 71% | 2802 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 51,372 psi | 81% | 2966 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,411 psi | 71% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,426 psi | 71% | 2858 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 36,535 psi | 57% | 2687 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 28,297 psi | 44% | 2556 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 51,547 psi | 81% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,064 psi | 72% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,785 psi | 65% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,438 psi | 67% | 2766 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,751 psi | 54% | 2618 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,710 psi | 59% | 2733 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 47,616 psi | 75% | 2881 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,944 psi | 64% | 2753 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 37,202 psi | 58% | 2733 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 33,591 psi | 53% | 2717 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,777 psi | 48% | 2533 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,268 psi | 74% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,137 psi | 74% | 2969 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,415 psi | 49% | 2717 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,526 psi | 68% | 2844 fps | 99% |
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 96 powders for .300 WSM loaded with the .3085 | 150gr | Prvi Partizan FMJ. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,205 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.3085" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 WSM with the .3085 | 150gr | Prvi Partizan FMJ 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.