Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | AERO SB,- smax:18.15 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 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.
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>> | 82% | 54,926 psi | 86% | 2877 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,710 psi | 89% | 2956 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2992 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 55,332 psi | 87% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,681 psi | 89% | 3048 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3143 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 55,782 psi | 87% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,273 psi | 85% | 3035 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3087 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,347 psi | 87% | 3097 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,346 psi | 85% | 3031 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,579 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,956 psi | 89% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,740 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,361 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,276 psi | 90% | 3081 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3081 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,541 psi | 70% | 2927 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,434 psi | 87% | 3156 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 2995 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 57,537 psi | 90% | 3012 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3081 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 56,898 psi | 89% | 2995 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 54,244 psi | 85% | 2972 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,317 psi | 87% | 3045 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 55,042 psi | 86% | 3005 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 55,666 psi | 87% | 3031 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,505 psi | 85% | 3009 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,317 psi | 85% | 2976 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,709 psi | 87% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,796 psi | 87% | 3084 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 57% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,362 psi | 88% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,259 psi | 87% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,346 psi | 85% | 2933 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 54,520 psi | 85% | 2976 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,129 psi | 86% | 2969 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 57,130 psi | 90% | 3038 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,795 psi | 86% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,363 psi | 90% | 3022 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3054 fps | 96.4% |
| Lovex S060 | <<locked>> | 82% | 56,768 psi | 89% | 2940 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,492 psi | 87% | 2946 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,172 psi | 86% | 2966 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 56,434 psi | 88% | 3009 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,991 psi | 71% | 2828 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 56,681 psi | 89% | 2959 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,406 psi | 90% | 2953 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,231 psi | 88% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,361 psi | 87% | 3028 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 54,259 psi | 85% | 3107 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 55,347 psi | 87% | 3031 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,188 psi | 90% | 3028 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3071 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 54,317 psi | 85% | 3031 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2940 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,172 psi | 85% | 2956 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,708 psi | 86% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,782 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,390 psi | 87% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,671 psi | 68% | 2946 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 57,363 psi | 90% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,653 psi | 90% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,883 psi | 88% | 3005 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 56,478 psi | 89% | 3068 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 56,898 psi | 89% | 2995 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,172 psi | 86% | 2966 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 55,492 psi | 87% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,434 psi | 88% | 3009 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,825 psi | 87% | 3015 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,623 psi | 89% | 2989 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,363 psi | 90% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,969 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,853 psi | 86% | 2920 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,999 psi | 88% | 3061 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 57,159 psi | 90% | 2881 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,435 psi | 90% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,085 psi | 85% | 2940 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 54,853 psi | 86% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,985 psi | 89% | 3038 fps | 99% |
| Vihtavuori N135 | <<locked>> | 84% | 57,696 psi | 90% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,650 psi | 86% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,405 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,609 psi | 90% | 3028 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2956 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 56,289 psi | 88% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,652 psi | 89% | 3031 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3091 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,563 psi | 86% | 3097 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,638 psi | 90% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,550 psi | 87% | 3048 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,557 psi | 73% | 3068 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,855 psi | 89% | 2995 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3038 fps | 98.3% |
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% | 51,271 psi | 80% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,414 psi | 77% | 2835 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 35,737 psi | 56% | 2631 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,602 psi | 76% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,130 psi | 58% | 2680 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 98% | 53,229 psi | 83% | 3074 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 46,253 psi | 72% | 2808 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,295 psi | 69% | 2848 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 48,414 psi | 76% | 2956 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,430 psi | 81% | 3031 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,440 psi | 70% | 2848 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,818 psi | 73% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,966 psi | 78% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,303 psi | 57% | 2697 fps | 97.9% |
| Alliant Reloder-17 | 66.6 gr | 80% | 41,408 psi | 65% | 2831 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,932 psi | 69% | 2838 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,353 psi | 70% | 2890 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,382 psi | 41% | 2428 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,287 psi | 54% | 2677 fps | 95.6% |
| Alliant Reloder-26 | 71.7 gr | 84% | 32,692 psi | 51% | 2674 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 43,671 psi | 68% | 2874 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,992 psi | 74% | 2841 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,353 psi | 70% | 2890 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,278 psi | 65% | 2707 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 47,485 psi | 74% | 2854 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,218 psi | 61% | 2733 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 42,337 psi | 66% | 2762 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 51,982 psi | 81% | 2966 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,879 psi | 80% | 2946 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,794 psi | 53% | 2585 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,938 psi | 81% | 2953 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,365 psi | 65% | 2812 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,808 psi | 83% | 2920 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,602 psi | 76% | 2844 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,966 psi | 80% | 2877 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 39,494 psi | 62% | 2687 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,786 psi | 67% | 2740 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,810 psi | 56% | 2638 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 51,271 psi | 80% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,415 psi | 79% | 2900 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 49,400 psi | 77% | 2989 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,447 psi | 84% | 2887 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,863 psi | 77% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,176 psi | 63% | 2687 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 38,392 psi | 60% | 2661 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 34,490 psi | 54% | 2598 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 53,069 psi | 83% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,041 psi | 85% | 2904 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,327 psi | 77% | 2890 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,034 psi | 71% | 2841 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 37,913 psi | 59% | 2776 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 37,086 psi | 58% | 2680 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 49,763 psi | 78% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,588 psi | 78% | 3002 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 36,042 psi | 56% | 2664 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 40,872 psi | 64% | 2799 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 43% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,398 psi | 74% | 2835 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,048 psi | 69% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,985 psi | 58% | 2700 fps | 97.5% |
| ReloadSwiss RS 70 | 67.6 gr | 80% | 35,984 psi | 56% | 2707 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,582 psi | 64% | 2871 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,502 psi | 79% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,150 psi | 69% | 2785 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,110 psi | 77% | 2890 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 43,018 psi | 67% | 2822 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,278 psi | 65% | 2707 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,176 psi | 63% | 2687 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 48,863 psi | 77% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,392 psi | 60% | 2661 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,614 psi | 71% | 2844 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,113 psi | 83% | 2933 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,896 psi | 84% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,542 psi | 71% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,291 psi | 62% | 2628 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,627 psi | 67% | 2815 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,650 psi | 84% | 2831 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,498 psi | 70% | 2785 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 50,546 psi | 79% | 2877 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,417 psi | 52% | 2631 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 40,785 psi | 64% | 2743 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 50,836 psi | 80% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,184 psi | 80% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,554 psi | 67% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,537 psi | 60% | 2684 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 43,018 psi | 67% | 2779 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 49,487 psi | 78% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,985 psi | 60% | 2680 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,993 psi | 45% | 2507 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 50,778 psi | 80% | 3028 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,695 psi | 59% | 2651 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 39,407 psi | 62% | 2736 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,542 psi | 42% | 2513 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,055 psi | 83% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,250 psi | 68% | 2789 fps | 95.2% |
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 | 165gr | AERO SB,- smax:18.15. Alliant Reloder-26 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,156 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 165.0 gr projectile in 0.308" calls for a 1:11.0 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 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | AERO SB,- smax:18.15 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.