Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 153gr | TWENTY-NINE SILENTIO 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 70, Alliant Reloder-26 and Hodgdon Superformance.
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 2495 | <<locked>> | 82% | 54,824 psi | 86% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,999 psi | 88% | 3041 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3077 fps | 99.2% |
| Accurate 4064 | <<locked>> | 84% | 55,245 psi | 87% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,217 psi | 88% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,216 psi | 87% | 3225 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 82% | 57,421 psi | 90% | 3114 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,187 psi | 86% | 3064 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,116 psi | 90% | 3182 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3166 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,520 psi | 85% | 3189 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,130 psi | 90% | 3176 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,130 psi | 90% | 3176 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,956 psi | 88% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,362 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,710 psi | 89% | 3202 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,302 psi | 85% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,318 psi | 88% | 3163 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 3159 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,106 psi | 69% | 3005 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,520 psi | 85% | 3241 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,682 psi | 90% | 3133 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,240 psi | 77% | 3077 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 56,942 psi | 89% | 3107 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 3159 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 56,362 psi | 88% | 3087 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 57,435 psi | 90% | 3123 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,505 psi | 85% | 3130 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 88% | 54,360 psi | 85% | 3091 fps | 97.5% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3153 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,203 psi | 90% | 3120 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,955 psi | 86% | 3107 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,911 psi | 86% | 3169 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1952 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,579 psi | 87% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,766 psi | 86% | 3048 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,334 psi | 90% | 3081 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 57,450 psi | 90% | 3120 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,650 psi | 86% | 3061 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 56,507 psi | 89% | 3130 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,114 psi | 85% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,521 psi | 89% | 3100 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 56,130 psi | 88% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,897 psi | 86% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,549 psi | 85% | 3054 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 55,825 psi | 87% | 3097 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,715 psi | 70% | 2910 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 56,231 psi | 88% | 3054 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,029 psi | 89% | 3051 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,651 psi | 87% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,650 psi | 86% | 3114 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3258 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 54,607 psi | 86% | 3120 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,463 psi | 88% | 3123 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 57,305 psi | 90% | 3179 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,847 psi | 73% | 3009 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1998 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,348 psi | 90% | 3107 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,363 psi | 90% | 3186 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,740 psi | 90% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,956 psi | 88% | 3159 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,447 psi | 85% | 3186 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,840 psi | 89% | 3054 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,043 psi | 89% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,143 psi | 86% | 3087 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 55,579 psi | 87% | 3150 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 56,362 psi | 88% | 3087 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,549 psi | 85% | 3054 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 54,897 psi | 86% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,825 psi | 87% | 3097 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,143 psi | 86% | 3107 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,999 psi | 88% | 3084 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,855 psi | 89% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,520 psi | 85% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,389 psi | 85% | 3005 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,085 psi | 86% | 3143 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 56,681 psi | 89% | 2979 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,058 psi | 89% | 3097 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,099 psi | 85% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,376 psi | 88% | 3127 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 57,392 psi | 90% | 2963 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,319 psi | 90% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,522 psi | 90% | 3028 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,708 psi | 86% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,956 psi | 89% | 3120 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3035 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 55,680 psi | 87% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,086 psi | 88% | 3120 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 3182 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3245 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,608 psi | 89% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,723 psi | 86% | 3133 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,861 psi | 72% | 3153 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,304 psi | 88% | 3091 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3120 fps | 97.6% |
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% | 51,314 psi | 80% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,037 psi | 77% | 2917 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 38,232 psi | 60% | 2772 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 48,617 psi | 76% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,999 psi | 58% | 2766 fps | 97.1% |
| Accurate High Country | <<locked>> | 96% | 51,401 psi | 81% | 3156 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 53,969 psi | 85% | 3058 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,847 psi | 72% | 2897 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 46,775 psi | 73% | 2989 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 51,256 psi | 80% | 3097 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,633 psi | 79% | 3120 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,065 psi | 74% | 2992 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,065 psi | 74% | 2992 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,441 psi | 73% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,472 psi | 78% | 2995 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,042 psi | 56% | 2776 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,959 psi | 64% | 2913 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,499 psi | 73% | 2982 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,789 psi | 73% | 3031 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,224 psi | 44% | 2562 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,434 psi | 57% | 2812 fps | 95.6% |
| Alliant Reloder-26 | 75 gr | 86% | 34,911 psi | 55% | 2815 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,027 psi | 85% | 3074 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 46,122 psi | 72% | 3015 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,688 psi | 73% | 2933 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 46,789 psi | 73% | 3031 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 43,772 psi | 69% | 2848 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,021 psi | 74% | 2940 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 41,771 psi | 65% | 2877 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 44,802 psi | 70% | 2907 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,795 psi | 84% | 3091 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,591 psi | 53% | 2664 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,314 psi | 80% | 3048 fps | 100% |
| Hodgdon Superformance | 73.8 gr | 82% | 40,901 psi | 64% | 2887 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,156 psi | 82% | 3012 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,225 psi | 76% | 2933 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,604 psi | 79% | 2963 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 41,829 psi | 66% | 2825 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,438 psi | 67% | 2822 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 35,607 psi | 56% | 2717 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 50,749 psi | 80% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,113 psi | 83% | 3041 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,982 psi | 83% | 2982 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,559 psi | 76% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,045 psi | 63% | 2769 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 40,799 psi | 64% | 2805 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 36,811 psi | 58% | 2740 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 52,765 psi | 83% | 2999 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,534 psi | 84% | 2999 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,878 psi | 77% | 2982 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,572 psi | 75% | 2982 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 40,219 psi | 63% | 2917 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,811 psi | 58% | 2762 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,182 psi | 77% | 3002 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 38,232 psi | 60% | 2805 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 43,555 psi | 68% | 2940 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 43% | 1788 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,065 psi | 74% | 2923 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,490 psi | 84% | 3123 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,511 psi | 68% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,709 psi | 58% | 2779 fps | 96.6% |
| ReloadSwiss RS 70 | 69.1 gr | 80% | 35,708 psi | 56% | 2779 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 50,314 psi | 79% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,918 psi | 69% | 2874 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 51,750 psi | 81% | 3028 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 45,498 psi | 71% | 2963 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 43,772 psi | 69% | 2848 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,045 psi | 63% | 2769 fps | 96.7% |
| Shooters World Precision | <<locked>> | 80% | 48,559 psi | 76% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,799 psi | 64% | 2805 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,049 psi | 71% | 2930 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,431 psi | 82% | 3025 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,548 psi | 84% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,266 psi | 71% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,262 psi | 62% | 2710 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,092 psi | 71% | 2956 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 53,316 psi | 84% | 2930 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,237 psi | 69% | 2874 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 33,315 psi | 52% | 2713 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 43,192 psi | 68% | 2881 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 54,085 psi | 85% | 2917 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,502 psi | 79% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,676 psi | 79% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,279 psi | 66% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,203 psi | 60% | 2762 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 45,513 psi | 71% | 2917 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,994 psi | 77% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,695 psi | 59% | 2762 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 31,053 psi | 49% | 2644 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 98% | 53,650 psi | 84% | 3176 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,550 psi | 59% | 2733 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 41,771 psi | 65% | 2877 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,543 psi | 45% | 2657 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,489 psi | 82% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,803 psi | 72% | 2927 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 | 153gr | TWENTY-NINE SILENTIO. Norma MRP delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,258 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 57–90 %, leaving at least 10 % headroom. The 153.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 Weath. Mag. with the .308 | 153gr | TWENTY-NINE SILENTIO 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.