Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 161gr | TWENTY-NINE ERTP bullet and 97 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 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 2495 | <<locked>> | 82% | 55,608 psi | 87% | 2913 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,782 psi | 89% | 2982 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3022 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,898 psi | 88% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,956 psi | 89% | 3081 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,927 psi | 88% | 3166 fps | 97.1% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3169 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,014 psi | 88% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,273 psi | 85% | 3061 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3110 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,230 psi | 87% | 3127 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,375 psi | 85% | 3061 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,375 psi | 85% | 3061 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,695 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,101 psi | 89% | 3051 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,392 psi | 90% | 3133 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,071 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,217 psi | 90% | 3110 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3107 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,730 psi | 70% | 2956 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,448 psi | 87% | 3186 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 3025 fps | 96.8% |
| Bofors RP3 | <<locked>> | 84% | 54,128 psi | 85% | 2989 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3107 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 57,029 psi | 89% | 3028 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 54,476 psi | 85% | 3002 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 55,419 psi | 87% | 3074 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 55,042 psi | 86% | 3031 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 55,622 psi | 87% | 3054 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,389 psi | 85% | 3005 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,767 psi | 87% | 3041 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,724 psi | 87% | 3110 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1896 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,362 psi | 88% | 3005 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,317 psi | 87% | 2982 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,433 psi | 85% | 2963 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 54,549 psi | 85% | 3002 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,172 psi | 86% | 2999 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 57,246 psi | 90% | 3071 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,940 psi | 86% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,116 psi | 90% | 3045 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3081 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 56,782 psi | 89% | 2969 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,738 psi | 87% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,361 psi | 87% | 2999 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 56,637 psi | 89% | 3038 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,426 psi | 71% | 2861 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 56,927 psi | 89% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,551 psi | 90% | 2982 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,362 psi | 88% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,376 psi | 87% | 3058 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 54,027 psi | 85% | 3133 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 55,434 psi | 87% | 3061 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,217 psi | 90% | 3061 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3097 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 54,346 psi | 85% | 3058 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,558 psi | 75% | 2963 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 58% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,288 psi | 85% | 2986 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,694 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,826 psi | 89% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,361 psi | 87% | 3130 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,859 psi | 69% | 2976 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 57,638 psi | 90% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,244 psi | 85% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,854 psi | 88% | 3031 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 56,507 psi | 89% | 3094 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 57,029 psi | 89% | 3028 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,361 psi | 87% | 2999 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 55,738 psi | 87% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,637 psi | 89% | 3038 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,883 psi | 88% | 3048 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,695 psi | 89% | 3018 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,711 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,056 psi | 86% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,013 psi | 86% | 2946 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,014 psi | 88% | 3091 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 57,392 psi | 90% | 2913 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,667 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,740 psi | 90% | 3025 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 54,897 psi | 86% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,087 psi | 89% | 3068 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 54,607 psi | 86% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,781 psi | 86% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,521 psi | 87% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,667 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 2979 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,420 psi | 88% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,782 psi | 89% | 3061 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 3123 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,288 psi | 85% | 3120 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,551 psi | 90% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,637 psi | 87% | 3081 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,557 psi | 73% | 3100 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,942 psi | 89% | 3025 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3064 fps | 98.1% |
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% | 52,054 psi | 82% | 2864 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,806 psi | 78% | 2864 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 36,289 psi | 57% | 2664 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 49,269 psi | 77% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,637 psi | 59% | 2720 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 48,617 psi | 76% | 3035 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 98% | 53,258 psi | 83% | 3100 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 46,383 psi | 73% | 2838 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 44,425 psi | 70% | 2874 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 51,895 psi | 81% | 3045 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,387 psi | 81% | 3061 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,614 psi | 70% | 2874 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,614 psi | 70% | 2874 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,065 psi | 74% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,198 psi | 79% | 2936 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,550 psi | 57% | 2723 fps | 97.7% |
| Alliant Reloder-17 | 66.5 gr | 80% | 41,597 psi | 65% | 2861 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,092 psi | 69% | 2867 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,512 psi | 70% | 2920 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,876 psi | 42% | 2461 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,635 psi | 54% | 2707 fps | 95.4% |
| Alliant Reloder-26 | 71.6 gr | 84% | 33,141 psi | 52% | 2707 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 43,859 psi | 69% | 2904 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 47,413 psi | 74% | 2877 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,512 psi | 70% | 2920 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 41,626 psi | 65% | 2736 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 47,776 psi | 75% | 2887 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 39,682 psi | 62% | 2766 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,540 psi | 67% | 2792 fps | 95% |
| Hodgdon H4831 | <<locked>> | 96% | 51,996 psi | 81% | 2992 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,127 psi | 53% | 2618 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,054 psi | 82% | 2986 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,394 psi | 65% | 2838 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 43% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,852 psi | 83% | 2953 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,776 psi | 76% | 2874 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,097 psi | 80% | 2904 fps | 98.3% |
| IMR 4350 | <<locked>> | 82% | 39,740 psi | 62% | 2713 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,975 psi | 67% | 2769 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 36,216 psi | 57% | 2671 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 51,488 psi | 81% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,809 psi | 84% | 2989 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 49,472 psi | 78% | 3015 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 53,534 psi | 84% | 2917 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,168 psi | 77% | 2874 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,567 psi | 64% | 2717 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 38,812 psi | 61% | 2694 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 35,085 psi | 55% | 2635 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 53,432 psi | 84% | 2936 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,201 psi | 85% | 2936 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,545 psi | 78% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,165 psi | 71% | 2867 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 40,843 psi | 64% | 2871 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 37,405 psi | 59% | 2713 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 49,879 psi | 78% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,705 psi | 78% | 3028 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 36,361 psi | 57% | 2697 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 41,162 psi | 65% | 2825 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 43% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,616 psi | 75% | 2864 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,179 psi | 69% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,376 psi | 59% | 2733 fps | 97.3% |
| ReloadSwiss RS 70 | 67.5 gr | 80% | 36,289 psi | 57% | 2736 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,901 psi | 64% | 2900 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,865 psi | 80% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,585 psi | 70% | 2818 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,197 psi | 77% | 2913 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 43,236 psi | 68% | 2851 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,626 psi | 65% | 2736 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,567 psi | 64% | 2717 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 49,168 psi | 77% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,812 psi | 61% | 2694 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,803 psi | 72% | 2874 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,229 psi | 83% | 2963 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,230 psi | 85% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,905 psi | 72% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,697 psi | 62% | 2657 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,861 psi | 72% | 2907 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 53,896 psi | 84% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,875 psi | 70% | 2818 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 54,215 psi | 85% | 2966 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,953 psi | 53% | 2667 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 41,133 psi | 64% | 2772 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 51,271 psi | 80% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,343 psi | 80% | 2864 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,873 psi | 67% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,798 psi | 61% | 2713 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 43,221 psi | 68% | 2808 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,705 psi | 78% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,319 psi | 60% | 2713 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,660 psi | 46% | 2546 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 50,821 psi | 80% | 3058 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,942 psi | 59% | 2680 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,682 psi | 62% | 2766 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,064 psi | 42% | 2549 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,185 psi | 83% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,514 psi | 73% | 2877 fps | 95.8% |
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 97 powders for .300 Weath. Mag. loaded with the .308 | 161gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,186 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,186 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 161.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 161gr | TWENTY-NINE ERTP 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.