Load Specifications
Load data in caliber .300 WSM with .3085 | 150gr | Prvi Partizan SP 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.
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% | 56,173 psi | 88% | 2953 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,230 psi | 87% | 2979 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,216 psi | 87% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,521 psi | 87% | 2979 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 55,405 psi | 87% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,172 psi | 86% | 3110 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,347 psi | 87% | 3058 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,405 psi | 88% | 3054 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,476 psi | 85% | 3009 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,405 psi | 87% | 2986 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,288 psi | 87% | 3179 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,797 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,188 psi | 90% | 3104 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3169 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,172 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,350 psi | 63% | 2881 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,440 psi | 71% | 3054 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,448 psi | 87% | 3071 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 57,537 psi | 90% | 3100 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,305 psi | 90% | 3061 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,072 psi | 88% | 2989 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,580 psi | 90% | 3091 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,883 psi | 88% | 3140 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,259 psi | 85% | 2989 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,810 psi | 86% | 3054 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 94% | 55,999 psi | 88% | 3130 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 98% | 56,594 psi | 89% | 3091 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 55,898 psi | 88% | 3068 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3038 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,796 psi | 87% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,158 psi | 86% | 3140 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,563 psi | 56% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,144 psi | 88% | 3054 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,636 psi | 86% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,245 psi | 87% | 3028 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,621 psi | 86% | 2995 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 3087 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,753 psi | 87% | 3041 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,574 psi | 78% | 2999 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 54,984 psi | 86% | 3081 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,476 psi | 85% | 3009 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,506 psi | 87% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,824 psi | 86% | 2979 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,796 psi | 87% | 3035 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,158 psi | 86% | 3035 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 56,159 psi | 88% | 3071 fps | 97.9% |
| Norma 201 | <<locked>> | 88% | 57,667 psi | 90% | 3054 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,839 psi | 86% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,347 psi | 88% | 3091 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,172 psi | 85% | 3097 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 57,276 psi | 90% | 3120 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3150 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 54,650 psi | 86% | 3022 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,259 psi | 85% | 3041 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,216 psi | 87% | 3005 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 56% | 1929 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,305 psi | 90% | 3038 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,955 psi | 86% | 3031 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,143 psi | 85% | 3117 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,682 psi | 90% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,071 psi | 86% | 3130 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,621 psi | 86% | 3163 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 55,245 psi | 87% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,607 psi | 86% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,392 psi | 90% | 3091 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,305 psi | 90% | 3061 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,158 psi | 86% | 3035 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,506 psi | 87% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,796 psi | 87% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,159 psi | 88% | 3071 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,506 psi | 87% | 3097 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,985 psi | 89% | 3058 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,450 psi | 90% | 3081 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,579 psi | 87% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,825 psi | 87% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,550 psi | 87% | 2986 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 55,651 psi | 87% | 3041 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,172 psi | 86% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,579 psi | 89% | 3048 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,537 psi | 90% | 3087 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 3097 fps | 100% |
| Unknown powder | <<locked>> | 96% | 55,347 psi | 87% | 3107 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 57,566 psi | 90% | 2933 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,303 psi | 87% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,447 psi | 85% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,389 psi | 85% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,288 psi | 87% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,767 psi | 87% | 3074 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 57,682 psi | 90% | 3068 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,302 psi | 85% | 2999 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,101 psi | 88% | 3123 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,541 psi | 70% | 2969 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,203 psi | 90% | 3071 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,477 psi | 87% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,999 psi | 88% | 3130 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,289 psi | 57% | 2881 fps | 98.4% |
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% | 49,734 psi | 78% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,525 psi | 67% | 2776 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,153 psi | 75% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,660 psi | 76% | 2861 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,219 psi | 63% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,289 psi | 57% | 2743 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 45,861 psi | 72% | 2887 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 39,015 psi | 61% | 2726 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,964 psi | 75% | 2897 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,472 psi | 76% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | 58.9 gr | 80% | 41,829 psi | 66% | 2917 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,725 psi | 61% | 2749 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,568 psi | 65% | 2818 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,318 psi | 57% | 2756 fps | 95.6% |
| Alliant Reloder-17 | 58 gr | 80% | 33,489 psi | 52% | 2707 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,473 psi | 49% | 2648 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,291 psi | 62% | 2913 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,165 psi | 71% | 2890 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 38,464 psi | 60% | 2753 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 47,630 psi | 75% | 2894 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,705 psi | 78% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,992 psi | 74% | 2920 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,040 psi | 82% | 3077 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 50,981 psi | 80% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,276 psi | 62% | 2756 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 88% | 45,498 psi | 71% | 2940 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 94% | 49,995 psi | 78% | 2976 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,311 psi | 73% | 2900 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,357 psi | 49% | 2592 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,914 psi | 63% | 2815 fps | 98.8% |
| Hodgdon Superformance | 70.5 gr | 92% | 47,659 psi | 75% | 3002 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 41% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,147 psi | 64% | 2779 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,293 psi | 66% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,159 psi | 60% | 2700 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,600 psi | 71% | 2828 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,761 psi | 75% | 2917 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,369 psi | 73% | 2871 fps | 95.4% |
| IMR 4831 | <<locked>> | 90% | 36,100 psi | 57% | 2720 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 42,583 psi | 67% | 2851 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 47,964 psi | 75% | 2897 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 45,252 psi | 71% | 2867 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,730 psi | 72% | 2822 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 40,959 psi | 64% | 2769 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,654 psi | 64% | 2759 fps | 95.4% |
| Lovex S070 | <<locked>> | 90% | 43,642 psi | 68% | 2841 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,933 psi | 70% | 2838 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 45,295 psi | 71% | 2848 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,930 psi | 64% | 2805 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 36,550 psi | 57% | 2746 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 40,582 psi | 64% | 2818 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 43,555 psi | 68% | 2907 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,892 psi | 75% | 2900 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,558 psi | 75% | 2923 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,677 psi | 81% | 2946 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 42% | 1729 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,751 psi | 84% | 2986 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,409 psi | 66% | 2799 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,918 psi | 69% | 2927 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,621 psi | 56% | 2782 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,129 psi | 57% | 2759 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,696 psi | 61% | 2828 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 48,834 psi | 77% | 2884 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,743 psi | 67% | 2785 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,187 psi | 57% | 2694 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 47,630 psi | 75% | 2894 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,654 psi | 64% | 2759 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,252 psi | 71% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,959 psi | 64% | 2769 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 43,642 psi | 68% | 2841 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,130 psi | 58% | 2743 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,238 psi | 72% | 2874 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,396 psi | 70% | 2854 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,195 psi | 72% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,508 psi | 60% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,513 psi | 71% | 2812 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 52,011 psi | 82% | 2982 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,861 psi | 72% | 2789 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,021 psi | 72% | 2871 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,970 psi | 58% | 2700 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 28,747 psi | 45% | 2572 fps | 95.9% |
| Unknown powder | <<locked>> | 86% | 39,624 psi | 62% | 2805 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 51,068 psi | 80% | 2841 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,511 psi | 68% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,322 psi | 66% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,293 psi | 66% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,575 psi | 49% | 2543 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 84% | 37,347 psi | 59% | 2723 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 50,531 psi | 79% | 2956 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,003 psi | 66% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,753 psi | 59% | 2769 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 34,127 psi | 53% | 2733 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,183 psi | 49% | 2546 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 51,764 psi | 81% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,498 psi | 71% | 2940 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,763 psi | 50% | 2736 fps | 96.1% |
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 96 powders for .300 WSM loaded with the .3085 | 150gr | Prvi Partizan SP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,212 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 1:15.5 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 SP 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.