Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | Steinbock Precision Jagd 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-17 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 82% | 55,695 psi | 89% | 2953 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,245 psi | 89% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,592 psi | 86% | 2976 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2930 fps | 97.1% |
| Accurate 4064 | <<locked>> | 88% | 55,361 psi | 89% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,593 psi | 89% | 3123 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,100 psi | 88% | 3061 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,130 psi | 90% | 3061 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 3094 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,795 psi | 86% | 3009 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,143 psi | 88% | 2986 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,969 psi | 88% | 3186 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,287 psi | 85% | 3091 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,997 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,403 psi | 86% | 3054 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,026 psi | 85% | 3127 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,215 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,504 psi | 84% | 3081 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,395 psi | 70% | 2956 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,414 psi | 79% | 3146 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,926 psi | 88% | 3074 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 53,766 psi | 86% | 3048 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,722 psi | 86% | 3018 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,274 psi | 89% | 2989 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,461 psi | 86% | 3038 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,520 psi | 87% | 3061 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 54,433 psi | 87% | 3114 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 54,766 psi | 88% | 3077 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 84% | 55,666 psi | 89% | 3074 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,881 psi | 85% | 3048 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,434 psi | 89% | 3107 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,027 psi | 88% | 3153 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 57% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,330 psi | 86% | 3018 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,840 psi | 90% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,593 psi | 89% | 3045 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,143 psi | 88% | 3022 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 54,085 psi | 87% | 3045 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,390 psi | 89% | 3051 fps | 97.8% |
| IMR 4831 | <<locked>> | 98% | 56,101 psi | 90% | 3117 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,766 psi | 88% | 3084 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,795 psi | 86% | 3009 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,056 psi | 88% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,201 psi | 87% | 2986 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 55,506 psi | 89% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,129 psi | 88% | 3048 fps | 98.9% |
| Lovex S070 | <<locked>> | 96% | 56,072 psi | 90% | 3084 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 53,679 psi | 86% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,404 psi | 87% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,217 psi | 90% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,868 psi | 88% | 3097 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 48,907 psi | 78% | 3094 fps | 96.6% |
| Norma URP | <<locked>> | 96% | 54,360 psi | 87% | 3107 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 53,287 psi | 85% | 3064 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 53,330 psi | 86% | 3100 fps | 98.4% |
| Ramshot TAC | <<locked>> | 82% | 54,041 psi | 87% | 3025 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,882 psi | 86% | 3045 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 58% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,679 psi | 88% | 3041 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,099 psi | 87% | 3123 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,664 psi | 86% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,332 psi | 89% | 3143 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,592 psi | 88% | 3173 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 54,578 psi | 88% | 2986 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,418 psi | 87% | 3005 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,650 psi | 86% | 3041 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 53,722 psi | 86% | 3018 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,129 psi | 88% | 3048 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,056 psi | 88% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,506 psi | 89% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,072 psi | 90% | 3084 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,477 psi | 89% | 3104 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,333 psi | 90% | 3061 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,577 psi | 86% | 3031 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,056 psi | 88% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,593 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,187 psi | 88% | 2995 fps | 97.9% |
| Somchem S335 | <<locked>> | 84% | 54,418 psi | 87% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,912 psi | 90% | 3051 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,882 psi | 86% | 3038 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,953 psi | 85% | 3114 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 3041 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 84% | 55,419 psi | 89% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,244 psi | 87% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,810 psi | 88% | 2982 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,361 psi | 89% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,127 psi | 85% | 3048 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 54,346 psi | 87% | 3009 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,200 psi | 85% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,912 psi | 90% | 3110 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,356 psi | 78% | 3045 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,142 psi | 85% | 3022 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,578 psi | 88% | 3058 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,679 psi | 88% | 3117 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,146 psi | 63% | 2979 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,461 psi | 86% | 3038 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 2015 | <<locked>> | 80% | 52,344 psi | 84% | 2904 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,339 psi | 73% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,021 psi | 75% | 2858 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 40,074 psi | 64% | 2808 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,902 psi | 69% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,142 psi | 55% | 2690 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,573 psi | 78% | 2949 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,263 psi | 66% | 2785 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 50,227 psi | 81% | 3035 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,618 psi | 81% | 2953 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,677 psi | 83% | 2936 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,657 psi | 72% | 2989 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 50,067 psi | 80% | 3031 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,147 psi | 66% | 2808 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,164 psi | 71% | 2881 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,084 psi | 55% | 2707 fps | 95.2% |
| Alliant Reloder-17 | 61 gr | 80% | 35,737 psi | 57% | 2779 fps | 97.7% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,356 psi | 79% | 3022 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,676 psi | 51% | 2664 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,927 psi | 59% | 2861 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,008 psi | 77% | 2953 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 41,089 psi | 66% | 2815 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 47,268 psi | 76% | 2900 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,083 psi | 84% | 2940 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,082 psi | 80% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,684 psi | 67% | 2818 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 44,701 psi | 72% | 2933 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 88% | 48,254 psi | 77% | 2956 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,052 psi | 79% | 2959 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,428 psi | 47% | 2539 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,353 psi | 73% | 2933 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 47,456 psi | 76% | 3012 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 43% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,949 psi | 75% | 2907 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 49,037 psi | 79% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,366 psi | 70% | 2825 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,614 psi | 73% | 2844 fps | 95.8% |
| IMR 4350 | <<locked>> | 90% | 44,875 psi | 72% | 2874 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,163 psi | 69% | 2818 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 35,389 psi | 57% | 2707 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 45,281 psi | 73% | 2913 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 50,618 psi | 81% | 2953 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,109 psi | 77% | 2923 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,051 psi | 77% | 2877 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 43,352 psi | 70% | 2825 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 37,942 psi | 61% | 2707 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 43,743 psi | 70% | 2854 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,442 psi | 76% | 2894 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,863 psi | 77% | 2900 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,540 psi | 70% | 2867 fps | 99% |
| Norma 204 | <<locked>> | 94% | 51,256 psi | 82% | 3035 fps | 95.2% |
| Norma MRP | <<locked>> | 98% | 45,672 psi | 73% | 3028 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 34,374 psi | 55% | 2697 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 43,424 psi | 70% | 2884 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 40,872 psi | 66% | 2858 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 50,531 psi | 81% | 2963 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,256 psi | 81% | 2982 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,003 psi | 67% | 2799 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,065 psi | 75% | 2995 fps | 99.1% |
| ReloadSwiss RS 60 | 61 gr | 80% | 38,000 psi | 61% | 2851 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,361 psi | 58% | 2769 fps | 95.6% |
| ReloadSwiss RS 70 | 66.6 gr | 86% | 38,580 psi | 62% | 2838 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,605 psi | 83% | 2936 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,237 psi | 73% | 2844 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,609 psi | 62% | 2756 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 47,268 psi | 76% | 2900 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,942 psi | 61% | 2707 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,109 psi | 77% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,352 psi | 70% | 2825 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 43,743 psi | 70% | 2854 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,740 psi | 64% | 2808 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,139 psi | 79% | 2940 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,065 psi | 75% | 2917 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,530 psi | 78% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,654 psi | 65% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,569 psi | 68% | 2762 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,269 psi | 77% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,863 psi | 78% | 2933 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 39,291 psi | 63% | 2759 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 28,747 psi | 46% | 2579 fps | 96.4% |
| Somchem S385 | <<locked>> | 96% | 45,818 psi | 73% | 2923 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 48,936 psi | 78% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,947 psi | 72% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,353 psi | 73% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,376 psi | 60% | 2690 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 35,737 psi | 57% | 2697 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 50,836 psi | 82% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,787 psi | 70% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,259 psi | 57% | 2697 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 32,314 psi | 52% | 2687 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,141 psi | 53% | 2612 fps | 97% |
| Winchester 748 | <<locked>> | 80% | 51,024 psi | 82% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,701 psi | 72% | 2933 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,037 psi | 48% | 2690 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,673 psi | 75% | 2920 fps | 99.7% |
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 | 150gr | Steinbock Precision Jagd. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,186 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,186 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 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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-17, ReloadSwiss RS 60 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | Steinbock Precision Jagd 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.