Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Sako Powerhead Blade bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon H414 and Alliant Reloder-16.
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 2495 | <<locked>> | 84% | 55,405 psi | 87% | 3022 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,609 psi | 90% | 3094 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 3058 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 55,898 psi | 88% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,188 psi | 90% | 3189 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,405 psi | 87% | 3114 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,637 psi | 89% | 3117 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,882 psi | 86% | 3169 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,696 psi | 90% | 3110 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,086 psi | 88% | 3248 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,810 psi | 86% | 3163 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,435 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,638 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,375 psi | 85% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,724 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3215 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 3143 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,182 psi | 76% | 3087 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,945 psi | 66% | 2982 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3291 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,521 psi | 87% | 3130 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,549 psi | 85% | 3100 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 3143 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 54,143 psi | 85% | 3077 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 55,042 psi | 86% | 3117 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,883 psi | 88% | 3186 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 55,695 psi | 87% | 3140 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,057 psi | 88% | 3123 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,665 psi | 86% | 3114 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,391 psi | 88% | 3159 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,405 psi | 88% | 3222 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 56% | 1965 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,305 psi | 90% | 3127 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,724 psi | 89% | 3104 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,173 psi | 88% | 3100 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,521 psi | 87% | 3081 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 55,303 psi | 87% | 3114 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,057 psi | 88% | 3114 fps | 98.6% |
| IMR 4831 | <<locked>> | 96% | 57,624 psi | 90% | 3179 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,463 psi | 87% | 3140 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,696 psi | 90% | 3110 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,695 psi | 87% | 3084 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,375 psi | 85% | 3035 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,072 psi | 88% | 3091 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,709 psi | 87% | 3104 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 57,000 psi | 89% | 3146 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,047 psi | 66% | 2887 fps | 96.7% |
| Norma 201 | <<locked>> | 84% | 57,421 psi | 90% | 3107 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,723 psi | 86% | 3051 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,869 psi | 89% | 3150 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,985 psi | 88% | 3166 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 54,360 psi | 85% | 3238 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 55,767 psi | 87% | 3169 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,128 psi | 85% | 3117 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,694 psi | 86% | 3166 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,143 psi | 86% | 3097 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,868 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,216 psi | 87% | 3215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,232 psi | 90% | 3212 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,941 psi | 88% | 3241 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,708 psi | 86% | 3054 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,636 psi | 86% | 3097 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,594 psi | 89% | 3140 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3199 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,143 psi | 85% | 3077 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,709 psi | 87% | 3104 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,695 psi | 87% | 3084 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,072 psi | 88% | 3091 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,000 psi | 89% | 3146 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,362 psi | 88% | 3159 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,710 psi | 89% | 3114 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,566 psi | 90% | 3136 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,013 psi | 86% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,028 psi | 88% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,680 psi | 87% | 3051 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3196 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 54,491 psi | 85% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,449 psi | 88% | 3100 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,636 psi | 86% | 3091 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,071 psi | 86% | 3173 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3173 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,535 psi | 87% | 2969 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,853 psi | 86% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,492 psi | 87% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,970 psi | 88% | 3064 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,578 psi | 86% | 3110 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 3022 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 86% | 57,203 psi | 90% | 3074 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,232 psi | 90% | 3169 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3166 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,360 psi | 85% | 3077 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,130 psi | 88% | 3189 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,250 psi | 68% | 3123 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,041 psi | 85% | 3087 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 3107 fps | 96.9% |
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 2495 | <<locked>> | 80% | 48,573 psi | 76% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,181 psi | 74% | 2910 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 38,537 psi | 60% | 2808 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,021 psi | 72% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,693 psi | 54% | 2736 fps | 96% |
| ADI AR 2206H | <<locked>> | 80% | 51,967 psi | 81% | 3054 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,121 psi | 69% | 2890 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 48,008 psi | 75% | 3041 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,143 psi | 85% | 3058 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,588 psi | 76% | 3114 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,993 psi | 75% | 3038 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,266 psi | 69% | 2913 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,471 psi | 74% | 2989 fps | 99.5% |
| Alliant Reloder-16 | 62.9 gr | 80% | 34,330 psi | 54% | 2756 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,812 psi | 61% | 2894 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,384 psi | 74% | 3028 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,776 psi | 75% | 3081 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,197 psi | 47% | 2654 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,782 psi | 58% | 2848 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,346 psi | 55% | 2854 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,895 psi | 81% | 3068 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 44,382 psi | 70% | 2923 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 47,776 psi | 75% | 3081 fps | 95.7% |
| Bofors RP7 | <<locked>> | 84% | 44,585 psi | 70% | 2894 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 44,976 psi | 70% | 2930 fps | 98.4% |
| Hodgdon H414 | 69.6 gr | 84% | 42,554 psi | 67% | 2927 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 45,716 psi | 72% | 2953 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 52,562 psi | 82% | 3068 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,749 psi | 50% | 2644 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,081 psi | 77% | 3038 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,901 psi | 66% | 2940 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,357 psi | 79% | 3012 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,011 psi | 83% | 3048 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,369 psi | 73% | 2930 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,718 psi | 76% | 2956 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 42,598 psi | 67% | 2871 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,785 psi | 64% | 2812 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 33,475 psi | 52% | 2690 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 48,704 psi | 76% | 3022 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 54,143 psi | 85% | 3058 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,895 psi | 81% | 3025 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,039 psi | 80% | 2979 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,325 psi | 73% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,159 psi | 60% | 2753 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 41,452 psi | 65% | 2848 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 36,854 psi | 58% | 2769 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,662 psi | 79% | 2995 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,285 psi | 80% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,804 psi | 73% | 2972 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,762 psi | 76% | 3031 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 40,857 psi | 64% | 2959 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,867 psi | 55% | 2743 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 47,123 psi | 74% | 2995 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 38,841 psi | 61% | 2848 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 43% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,150 psi | 71% | 2913 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,256 psi | 80% | 3117 fps | 99.8% |
| ReloadSwiss RS 60 | 67.7 gr | 80% | 41,336 psi | 65% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,635 psi | 54% | 2756 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 36,448 psi | 57% | 2828 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,225 psi | 76% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,698 psi | 65% | 2861 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 52,968 psi | 83% | 3077 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 46,282 psi | 73% | 3005 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 84% | 44,585 psi | 70% | 2894 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,159 psi | 60% | 2753 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,895 psi | 81% | 3025 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,325 psi | 73% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,452 psi | 65% | 2848 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,076 psi | 68% | 2920 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,968 psi | 83% | 3054 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,546 psi | 79% | 3022 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,706 psi | 81% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,511 psi | 68% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,885 psi | 63% | 2749 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,847 psi | 72% | 3002 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,358 psi | 80% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,765 psi | 83% | 3045 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,235 psi | 66% | 2864 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 31,227 psi | 49% | 2684 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 43,918 psi | 69% | 2923 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,272 psi | 82% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,370 psi | 76% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,747 psi | 76% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,306 psi | 63% | 2792 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,289 psi | 57% | 2746 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 46,296 psi | 73% | 2956 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 47,065 psi | 74% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,752 psi | 56% | 2743 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 31,082 psi | 49% | 2677 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,694 psi | 56% | 2717 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 42,554 psi | 67% | 2927 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,471 psi | 45% | 2680 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,488 psi | 79% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,731 psi | 73% | 2972 fps | 95.1% |
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 Weath. Mag. loaded with the .308 | 150gr | Sako Powerhead Blade. Alliant Reloder-26 delivers the highest muzzle velocity at 3,291 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,291 fps. Accurate 3100 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 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-22 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, Hodgdon H414, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Sako Powerhead Blade 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.