Load Specifications
Bullet Manufacturer:WM Bullets
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:16.5
Load data in caliber .300 WSM with .308 | 150gr | WM Bullets 30/30 Winchester bullet and 95 powders. The key underlying parameters are shown in the table above.
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% | 56,565 psi | 89% | 2959 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,622 psi | 87% | 2982 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,290 psi | 90% | 3054 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,578 psi | 86% | 2976 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 55,753 psi | 87% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,753 psi | 87% | 3120 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,912 psi | 88% | 3068 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,985 psi | 89% | 3068 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,795 psi | 86% | 3015 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,825 psi | 87% | 2992 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,825 psi | 87% | 3192 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,072 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,522 psi | 90% | 3110 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,710 psi | 89% | 3179 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,375 psi | 85% | 3159 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,770 psi | 64% | 2894 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,803 psi | 72% | 3064 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,738 psi | 87% | 3081 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 54,143 psi | 85% | 3051 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,186 psi | 85% | 3015 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,391 psi | 88% | 2999 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,317 psi | 85% | 3045 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,188 psi | 88% | 3146 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 55,071 psi | 86% | 3061 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 54,955 psi | 86% | 3114 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 94% | 55,288 psi | 87% | 3071 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 86% | 56,478 psi | 89% | 3081 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3045 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,130 psi | 88% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,637 psi | 87% | 3153 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 56% | 1893 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,740 psi | 90% | 3081 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,376 psi | 88% | 3058 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,347 psi | 88% | 3048 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,376 psi | 88% | 3025 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 54,476 psi | 85% | 3041 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,217 psi | 88% | 3051 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3114 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 55,622 psi | 87% | 3094 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,795 psi | 86% | 3015 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,796 psi | 87% | 3041 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,114 psi | 86% | 2989 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 56,159 psi | 88% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,637 psi | 87% | 3045 fps | 98.7% |
| Lovex S070 | <<locked>> | 98% | 56,695 psi | 89% | 3081 fps | 98% |
| Norma 201 | <<locked>> | 86% | 54,665 psi | 86% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,172 psi | 86% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,681 psi | 89% | 3097 fps | 100% |
| Norma URP | <<locked>> | 98% | 54,737 psi | 86% | 3107 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 57,580 psi | 90% | 3123 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3159 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 54,940 psi | 86% | 3028 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,795 psi | 86% | 3051 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,506 psi | 87% | 3012 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,056 psi | 56% | 1936 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,638 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,434 psi | 87% | 3045 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,534 psi | 85% | 3127 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,273 psi | 85% | 3163 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,579 psi | 87% | 3143 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,085 psi | 86% | 3173 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 55,347 psi | 87% | 2989 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,201 psi | 87% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,667 psi | 90% | 3097 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,186 psi | 85% | 3015 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,637 psi | 87% | 3045 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,796 psi | 87% | 3041 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,159 psi | 88% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,695 psi | 89% | 3081 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,825 psi | 87% | 3104 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,276 psi | 90% | 3064 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,230 psi | 85% | 3031 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,941 psi | 88% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,434 psi | 88% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,028 psi | 88% | 2995 fps | 97.6% |
| Somchem S321 | <<locked>> | 82% | 55,985 psi | 88% | 3048 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,477 psi | 87% | 2946 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,840 psi | 89% | 3054 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 54,273 psi | 85% | 3038 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3107 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,651 psi | 87% | 2910 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,202 psi | 88% | 2930 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,824 psi | 86% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,709 psi | 87% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,811 psi | 87% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,203 psi | 90% | 3104 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 55,230 psi | 87% | 3015 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,450 psi | 90% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,231 psi | 88% | 3107 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,817 psi | 70% | 2972 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,609 psi | 90% | 3077 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,317 psi | 87% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,955 psi | 86% | 3114 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,608 psi | 57% | 2894 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,172 psi | 85% | 3041 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,125 psi | 79% | 2864 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,902 psi | 67% | 2785 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,009 psi | 78% | 2943 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,834 psi | 75% | 2858 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,553 psi | 64% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,811 psi | 58% | 2756 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 46,209 psi | 72% | 2897 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,334 psi | 62% | 2733 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,240 psi | 76% | 2907 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 48,921 psi | 77% | 2894 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,105 psi | 66% | 2927 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,059 psi | 61% | 2759 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,901 psi | 66% | 2828 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,579 psi | 57% | 2766 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,736 psi | 53% | 2717 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,662 psi | 50% | 2654 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,956 psi | 58% | 2854 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,498 psi | 71% | 2897 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 38,798 psi | 61% | 2762 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 47,921 psi | 75% | 2904 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,806 psi | 78% | 2890 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,355 psi | 74% | 2927 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,388 psi | 82% | 3084 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,581 psi | 62% | 2762 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 44,933 psi | 70% | 2930 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 51,837 psi | 81% | 3012 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,659 psi | 73% | 2910 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,618 psi | 50% | 2598 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,786 psi | 67% | 2877 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 48,066 psi | 75% | 3015 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 42% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,657 psi | 70% | 2854 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 46,412 psi | 73% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,292 psi | 65% | 2772 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,470 psi | 73% | 2848 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 48,225 psi | 76% | 2930 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,601 psi | 73% | 2877 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 35,491 psi | 56% | 2707 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,917 psi | 67% | 2861 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 48,240 psi | 76% | 2907 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 45,585 psi | 71% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,064 psi | 72% | 2831 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 41,249 psi | 65% | 2779 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 40,915 psi | 64% | 2766 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 44,121 psi | 69% | 2854 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,266 psi | 71% | 2848 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 45,614 psi | 71% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,263 psi | 65% | 2812 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 36,825 psi | 58% | 2753 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,872 psi | 64% | 2825 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 41,075 psi | 64% | 2854 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 48,138 psi | 75% | 2907 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,848 psi | 75% | 2933 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,982 psi | 81% | 2956 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 42% | 1729 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,099 psi | 85% | 2992 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,685 psi | 67% | 2805 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,280 psi | 69% | 2940 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,882 psi | 56% | 2789 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,405 psi | 57% | 2766 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 39,102 psi | 61% | 2841 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 49,211 psi | 77% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,076 psi | 68% | 2795 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,506 psi | 57% | 2703 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 47,921 psi | 75% | 2904 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,915 psi | 64% | 2766 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,585 psi | 71% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,249 psi | 65% | 2779 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 44,121 psi | 69% | 2854 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,420 psi | 59% | 2753 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,572 psi | 73% | 2881 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,701 psi | 70% | 2861 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,528 psi | 73% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,827 psi | 61% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,006 psi | 72% | 2822 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 52,359 psi | 82% | 2989 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,151 psi | 72% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,296 psi | 73% | 2881 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 37,275 psi | 58% | 2710 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 27,151 psi | 43% | 2520 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 52,417 psi | 82% | 2861 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,891 psi | 73% | 2789 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,685 psi | 67% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,221 psi | 68% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,462 psi | 56% | 2641 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 36,071 psi | 57% | 2700 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,457 psi | 76% | 2904 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 41,669 psi | 65% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 38,000 psi | 60% | 2759 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 34,432 psi | 54% | 2740 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,401 psi | 49% | 2556 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 48,327 psi | 76% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 45,121 psi | 71% | 2933 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,095 psi | 47% | 2680 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,266 psi | 69% | 2864 fps | 99.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 95 powders for .300 WSM loaded with the .308 | 150gr | WM Bullets 30/30 Winchester. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,192 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 95 of the 95 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 0.308" calls for a 1:16.5 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.