Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 156gr | Reichenbeg HDB Ogival 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-16 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.
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>> | 86% | 55,840 psi | 90% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,839 psi | 88% | 2963 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2917 fps | 97.9% |
| Accurate 4064 | <<locked>> | 88% | 56,289 psi | 90% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,214 psi | 85% | 3045 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 56,086 psi | 90% | 3035 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,983 psi | 87% | 2986 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 3087 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,027 psi | 88% | 2982 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,765 psi | 85% | 3104 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,215 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,592 psi | 88% | 3028 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,578 psi | 88% | 3110 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,927 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 3071 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,773 psi | 72% | 2946 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,189 psi | 63% | 2838 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,068 psi | 82% | 3136 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,391 psi | 90% | 3054 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 54,897 psi | 88% | 3022 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,737 psi | 88% | 2999 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,275 psi | 90% | 2963 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,665 psi | 88% | 3012 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,651 psi | 89% | 3038 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 56,014 psi | 90% | 3100 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 56,275 psi | 90% | 3061 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 53,345 psi | 86% | 2995 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,505 psi | 87% | 3028 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,200 psi | 85% | 3025 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,547 psi | 84% | 3074 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,375 psi | 87% | 2995 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,563 psi | 86% | 2972 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,490 psi | 86% | 2969 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,304 psi | 90% | 3002 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 55,506 psi | 89% | 3031 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,272 psi | 85% | 2976 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 53,853 psi | 86% | 3038 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 56,028 psi | 90% | 3061 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,027 psi | 88% | 2982 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,231 psi | 90% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,405 psi | 89% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,272 psi | 85% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,173 psi | 90% | 3025 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 53,998 psi | 87% | 3012 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 54,737 psi | 88% | 2979 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,419 psi | 89% | 2976 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,824 psi | 86% | 3015 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,376 psi | 90% | 3084 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 50,444 psi | 81% | 3087 fps | 97.6% |
| Norma URP | <<locked>> | 96% | 55,898 psi | 90% | 3091 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 54,795 psi | 88% | 3045 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,810 psi | 88% | 3084 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 55,172 psi | 88% | 3005 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,071 psi | 88% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 58% | 1929 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,811 psi | 89% | 3022 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,564 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,361 psi | 89% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,374 psi | 86% | 3071 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,072 psi | 90% | 3159 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 55,274 psi | 89% | 2953 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,230 psi | 89% | 2976 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,998 psi | 88% | 3018 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,026 psi | 85% | 3051 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 92% | 54,737 psi | 88% | 2999 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,173 psi | 90% | 3025 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,231 psi | 90% | 3009 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,272 psi | 85% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,998 psi | 87% | 3012 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,156 psi | 85% | 3025 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,795 psi | 86% | 2982 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,737 psi | 88% | 3009 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,043 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,374 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,434 psi | 90% | 2979 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,547 psi | 84% | 3045 fps | 96.6% |
| Somchem S335 | <<locked>> | 84% | 55,477 psi | 89% | 2910 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,563 psi | 86% | 2972 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,984 psi | 88% | 3015 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,737 psi | 88% | 3091 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 3028 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 53,113 psi | 85% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,579 psi | 89% | 2940 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,086 psi | 90% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,127 psi | 85% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,650 psi | 88% | 3031 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 55,361 psi | 89% | 2979 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,331 psi | 87% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,679 psi | 86% | 3031 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 3025 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,708 psi | 88% | 3002 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,912 psi | 90% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,260 psi | 90% | 3104 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,132 psi | 64% | 2972 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,694 psi | 88% | 3015 fps | 100% |
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% | 45,774 psi | 73% | 2792 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,904 psi | 72% | 2782 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 38,174 psi | 61% | 2730 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,323 psi | 69% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,343 psi | 52% | 2608 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 49,429 psi | 79% | 2927 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,018 psi | 67% | 2766 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 48,138 psi | 77% | 2959 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,605 psi | 83% | 2930 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,585 psi | 73% | 2969 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,872 psi | 67% | 2785 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,947 psi | 72% | 2858 fps | 99.1% |
| Alliant Reloder-16 | 57.6 gr | 80% | 32,503 psi | 52% | 2631 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,506 psi | 59% | 2762 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,384 psi | 76% | 2946 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,211 psi | 48% | 2585 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,680 psi | 59% | 2772 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,259 psi | 57% | 2785 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,124 psi | 79% | 2936 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,713 psi | 67% | 2792 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 45,295 psi | 73% | 2825 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,011 psi | 85% | 2910 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,966 psi | 82% | 2953 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,525 psi | 68% | 2802 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,772 psi | 69% | 2854 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 46,224 psi | 74% | 2881 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,937 psi | 80% | 2936 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,849 psi | 48% | 2523 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,296 psi | 74% | 2910 fps | 99.9% |
| Hodgdon Superformance | 72.1 gr | 88% | 45,455 psi | 73% | 2936 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 43% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,848 psi | 77% | 2884 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,169 psi | 80% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,164 psi | 71% | 2805 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,543 psi | 75% | 2828 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 42,917 psi | 69% | 2799 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,292 psi | 66% | 2743 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 33,721 psi | 54% | 2631 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 46,093 psi | 74% | 2890 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 51,605 psi | 83% | 2930 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,139 psi | 79% | 2900 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,892 psi | 78% | 2854 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 44,063 psi | 71% | 2802 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,114 psi | 58% | 2631 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 41,669 psi | 67% | 2776 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,124 psi | 77% | 2867 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,733 psi | 78% | 2874 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,324 psi | 71% | 2844 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 49,168 psi | 79% | 2959 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 43,743 psi | 70% | 2949 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 34,983 psi | 56% | 2674 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 44,295 psi | 71% | 2861 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 39,030 psi | 63% | 2779 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 51,561 psi | 83% | 2943 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,416 psi | 82% | 2963 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 43% | 1726 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,830 psi | 69% | 2785 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,153 psi | 77% | 2976 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,914 psi | 62% | 2835 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,679 psi | 56% | 2690 fps | 95.6% |
| ReloadSwiss RS 70 | 66.1 gr | 84% | 36,782 psi | 59% | 2759 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,982 psi | 83% | 2904 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,861 psi | 74% | 2818 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,175 psi | 63% | 2730 fps | 99% |
| Rottweil R 905 | <<locked>> | 96% | 46,325 psi | 74% | 2930 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 45,295 psi | 73% | 2825 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,114 psi | 58% | 2631 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,139 psi | 79% | 2900 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,063 psi | 71% | 2802 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,669 psi | 67% | 2776 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,509 psi | 65% | 2789 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,111 psi | 80% | 2920 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,906 psi | 77% | 2890 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,385 psi | 79% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,394 psi | 66% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,509 psi | 65% | 2687 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,994 psi | 79% | 2982 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 48,979 psi | 79% | 2808 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,980 psi | 80% | 2913 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,900 psi | 64% | 2740 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,254 psi | 47% | 2562 fps | 97.3% |
| Somchem S385 | <<locked>> | 94% | 43,903 psi | 70% | 2848 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 49,908 psi | 80% | 2802 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,818 psi | 73% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,166 psi | 74% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,956 psi | 61% | 2664 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 34,084 psi | 55% | 2621 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 51,750 psi | 83% | 2927 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,657 psi | 72% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,591 psi | 54% | 2618 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 30,879 psi | 50% | 2608 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,678 psi | 54% | 2595 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 52,315 psi | 84% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,975 psi | 69% | 2858 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,456 psi | 46% | 2608 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,703 psi | 76% | 2897 fps | 99.9% |
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 Win. Mag. loaded with the .308 | 156gr | Reichenbeg HDB Ogival. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,159 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 (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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-16, Hodgdon Superformance rank at the top here: for .300 Win. Mag. with the .308 | 156gr | Reichenbeg HDB Ogival 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.