Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 148gr | Hasler ARIETE 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, Winchester 760 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% | 55,347 psi | 87% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,682 psi | 90% | 3117 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3074 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 55,796 psi | 87% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,203 psi | 90% | 3209 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,361 psi | 87% | 3130 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,768 psi | 89% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,824 psi | 86% | 3186 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,682 psi | 90% | 3133 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,159 psi | 88% | 3268 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,305 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,537 psi | 90% | 3186 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,418 psi | 85% | 3215 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,724 psi | 87% | 3241 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3232 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,039 psi | 80% | 3159 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,109 psi | 75% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2995 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,738 psi | 87% | 3310 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,579 psi | 87% | 3150 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,389 psi | 85% | 3117 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,039 psi | 80% | 3159 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 57,580 psi | 90% | 3156 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,667 psi | 90% | 3159 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,129 psi | 86% | 3136 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,883 psi | 88% | 3205 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,753 psi | 87% | 3159 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 56,014 psi | 88% | 3143 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,476 psi | 85% | 3130 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,463 psi | 88% | 3182 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,492 psi | 89% | 3245 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 56% | 1982 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,232 psi | 90% | 3146 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,492 psi | 89% | 3120 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,101 psi | 88% | 3120 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,448 psi | 87% | 3097 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 55,085 psi | 86% | 3127 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,912 psi | 88% | 3130 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 57,609 psi | 90% | 3199 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,390 psi | 87% | 3156 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,682 psi | 90% | 3133 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,593 psi | 87% | 3104 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,375 psi | 85% | 3054 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,999 psi | 88% | 3110 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,738 psi | 87% | 3123 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 57,043 psi | 89% | 3166 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,047 psi | 66% | 2904 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 57,377 psi | 90% | 3127 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,708 psi | 86% | 3071 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,797 psi | 89% | 3166 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,188 psi | 88% | 3186 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3258 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 55,767 psi | 87% | 3189 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,201 psi | 85% | 3140 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,853 psi | 86% | 3189 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 57% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,216 psi | 87% | 3117 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,998 psi | 86% | 3199 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,201 psi | 87% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,159 psi | 90% | 3228 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,072 psi | 88% | 3264 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,636 psi | 86% | 3074 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,505 psi | 85% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,536 psi | 89% | 3156 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3215 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 57,580 psi | 90% | 3156 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,738 psi | 87% | 3123 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,593 psi | 87% | 3104 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,999 psi | 88% | 3110 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,043 psi | 89% | 3166 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,434 psi | 88% | 3182 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,565 psi | 89% | 3133 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,464 psi | 90% | 3156 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,027 psi | 86% | 3009 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,970 psi | 88% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,695 psi | 87% | 3074 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3209 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 54,491 psi | 85% | 2999 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,521 psi | 89% | 3123 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,534 psi | 85% | 3110 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,042 psi | 86% | 3192 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,421 psi | 90% | 3192 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,579 psi | 87% | 2989 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,868 psi | 86% | 3035 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,463 psi | 87% | 3051 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,057 psi | 88% | 3087 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,375 psi | 85% | 3130 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 3035 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 86% | 57,276 psi | 90% | 3097 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,203 psi | 90% | 3189 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3189 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,302 psi | 85% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,130 psi | 88% | 3209 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,337 psi | 68% | 3143 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,740 psi | 90% | 3163 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 3123 fps | 96.8% |
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% | 48,370 psi | 76% | 2933 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,108 psi | 74% | 2927 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 38,377 psi | 60% | 2822 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,832 psi | 72% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,693 psi | 54% | 2753 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 51,967 psi | 81% | 3074 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,961 psi | 69% | 2904 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 94% | 47,805 psi | 75% | 3051 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,128 psi | 85% | 3077 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,486 psi | 76% | 3130 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,251 psi | 69% | 2930 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,471 psi | 74% | 3009 fps | 99.5% |
| Alliant Reloder-16 | 63.5 gr | 80% | 34,330 psi | 54% | 2772 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,769 psi | 61% | 2910 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,384 psi | 74% | 3048 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,703 psi | 75% | 3097 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,153 psi | 47% | 2667 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,796 psi | 58% | 2864 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,172 psi | 55% | 2867 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,779 psi | 81% | 3084 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 44,367 psi | 70% | 2940 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 47,703 psi | 75% | 3097 fps | 95.5% |
| Bofors RP7 | <<locked>> | 84% | 44,541 psi | 70% | 2910 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,896 psi | 84% | 3100 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,947 psi | 70% | 2946 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 42,467 psi | 67% | 2943 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 45,818 psi | 72% | 2972 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,562 psi | 82% | 3084 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,633 psi | 50% | 2657 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,211 psi | 77% | 3061 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,107 psi | 71% | 3028 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,169 psi | 79% | 3028 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,011 psi | 83% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,209 psi | 72% | 2946 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,704 psi | 76% | 2976 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 42,714 psi | 67% | 2890 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,482 psi | 68% | 2890 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,446 psi | 52% | 2707 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 48,704 psi | 76% | 3038 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 54,128 psi | 85% | 3077 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,837 psi | 81% | 3045 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,068 psi | 80% | 2999 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,354 psi | 73% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,014 psi | 60% | 2766 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 41,437 psi | 65% | 2864 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 39,407 psi | 62% | 2844 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 50,473 psi | 79% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,285 psi | 80% | 3015 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,804 psi | 73% | 2992 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,791 psi | 76% | 3051 fps | 95.4% |
| Norma MRP | <<locked>> | 94% | 43,859 psi | 69% | 3045 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 34,708 psi | 54% | 2753 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,065 psi | 74% | 3012 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 38,754 psi | 61% | 2861 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 43% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,136 psi | 71% | 2930 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,184 psi | 80% | 3133 fps | 99.8% |
| ReloadSwiss RS 60 | 68.3 gr | 80% | 41,263 psi | 65% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,592 psi | 54% | 2769 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 36,376 psi | 57% | 2841 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 48,066 psi | 75% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,553 psi | 65% | 2877 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 52,968 psi | 83% | 3097 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 46,296 psi | 73% | 3025 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 84% | 44,541 psi | 70% | 2910 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,014 psi | 60% | 2766 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,837 psi | 81% | 3045 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,354 psi | 73% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,437 psi | 65% | 2864 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,033 psi | 67% | 2936 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,837 psi | 83% | 3071 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,502 psi | 79% | 3041 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,532 psi | 81% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,381 psi | 68% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 42,714 psi | 67% | 2831 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,876 psi | 72% | 3018 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 51,184 psi | 80% | 2946 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,649 psi | 83% | 3061 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,032 psi | 66% | 2881 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 31,198 psi | 49% | 2700 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 43,743 psi | 69% | 2940 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,098 psi | 82% | 2936 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,196 psi | 76% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,559 psi | 76% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,147 psi | 63% | 2805 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 36,289 psi | 57% | 2762 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 46,253 psi | 72% | 2976 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 47,036 psi | 74% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,723 psi | 56% | 2759 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 31,038 psi | 49% | 2690 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,621 psi | 56% | 2733 fps | 98.4% |
| Winchester 760 | 70.3 gr | 84% | 42,641 psi | 67% | 2943 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,500 psi | 45% | 2694 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,401 psi | 79% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,891 psi | 73% | 2992 fps | 95% |
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 111 powders for .300 Weath. Mag. loaded with the .308 | 148gr | Hasler ARIETE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,310 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 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 148.0 gr projectile in 0.308" calls for a 1:12.0 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 60, Winchester 760, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 148gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.