Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | CutEdge Maximus 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, Alliant Reloder-16 and ReloadSwiss RS 70.
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 2015 | <<locked>> | 82% | 55,521 psi | 89% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,491 psi | 87% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,635 psi | 86% | 2992 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,847 psi | 74% | 2940 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 54,897 psi | 88% | 3038 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,753 psi | 89% | 3140 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,143 psi | 88% | 3077 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,173 psi | 90% | 3077 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 3114 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,940 psi | 86% | 3025 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,187 psi | 88% | 2995 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,259 psi | 89% | 3205 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,185 psi | 85% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,374 psi | 86% | 3064 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,156 psi | 85% | 3143 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,288 psi | 87% | 3173 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,634 psi | 84% | 3097 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,381 psi | 70% | 2969 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,472 psi | 79% | 3159 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,100 psi | 88% | 3091 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 53,534 psi | 86% | 3058 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,490 psi | 86% | 3028 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,259 psi | 89% | 3002 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,374 psi | 86% | 3045 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,317 psi | 87% | 3074 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 54,694 psi | 88% | 3133 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 54,897 psi | 88% | 3094 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 55,724 psi | 89% | 3087 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,229 psi | 85% | 3068 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,651 psi | 89% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,332 psi | 89% | 3173 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 57% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,243 psi | 85% | 3031 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,811 psi | 89% | 3064 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,651 psi | 89% | 3061 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,405 psi | 89% | 3041 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 54,375 psi | 87% | 3064 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,564 psi | 89% | 3068 fps | 98% |
| IMR 4831 | <<locked>> | 98% | 56,246 psi | 90% | 3127 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 54,752 psi | 88% | 3097 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,940 psi | 86% | 3025 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,129 psi | 88% | 3048 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,389 psi | 87% | 2999 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,405 psi | 89% | 3051 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,129 psi | 88% | 3061 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 56,217 psi | 90% | 3100 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 53,621 psi | 86% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,259 psi | 87% | 3018 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,173 psi | 90% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,085 psi | 88% | 3114 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,052 psi | 79% | 3110 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 54,607 psi | 88% | 3123 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 53,417 psi | 86% | 3077 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 53,505 psi | 86% | 3117 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 53,998 psi | 87% | 3038 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,824 psi | 86% | 3058 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 58% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,752 psi | 88% | 3058 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,114 psi | 87% | 3136 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,027 psi | 87% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,695 psi | 89% | 3159 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,694 psi | 88% | 3189 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 54,215 psi | 87% | 2995 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,085 psi | 87% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,606 psi | 86% | 3054 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 3081 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 53,490 psi | 86% | 3028 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,129 psi | 88% | 3061 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,129 psi | 88% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,405 psi | 89% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,217 psi | 90% | 3100 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,564 psi | 89% | 3117 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,376 psi | 90% | 3074 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,577 psi | 86% | 3041 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,027 psi | 88% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,666 psi | 89% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,042 psi | 88% | 3009 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 54,418 psi | 87% | 2949 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,086 psi | 90% | 3064 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,911 psi | 86% | 3054 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,229 psi | 85% | 3127 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,431 psi | 84% | 3058 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 84% | 55,434 psi | 89% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,360 psi | 87% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,882 psi | 88% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,448 psi | 89% | 3031 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,461 psi | 86% | 3064 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,215 psi | 87% | 3018 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,113 psi | 85% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,057 psi | 90% | 3123 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,356 psi | 78% | 3054 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,461 psi | 86% | 3038 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,621 psi | 88% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,940 psi | 88% | 3136 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,015 psi | 63% | 2989 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,403 psi | 86% | 3048 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% | 52,170 psi | 84% | 2913 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,657 psi | 72% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,905 psi | 75% | 2871 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 39,856 psi | 64% | 2815 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 42,279 psi | 68% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,794 psi | 54% | 2694 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,414 psi | 78% | 2959 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,002 psi | 66% | 2792 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 50,372 psi | 81% | 3051 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,546 psi | 81% | 2966 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,445 psi | 82% | 2943 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,657 psi | 72% | 3002 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,901 psi | 66% | 2818 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,947 psi | 70% | 2890 fps | 98.8% |
| Alliant Reloder-16 | 59.4 gr | 82% | 33,837 psi | 54% | 2713 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,549 psi | 57% | 2789 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,472 psi | 79% | 3038 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,444 psi | 50% | 2667 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,724 psi | 59% | 2867 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,979 psi | 77% | 2966 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 40,698 psi | 65% | 2822 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 44,324 psi | 71% | 2858 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,054 psi | 83% | 2953 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,995 psi | 80% | 2989 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,539 psi | 67% | 2828 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 44,556 psi | 71% | 2943 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 48,167 psi | 77% | 2969 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,907 psi | 78% | 2972 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,964 psi | 46% | 2539 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,150 psi | 72% | 2940 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,193 psi | 71% | 2959 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 42% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,891 psi | 75% | 2920 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 49,023 psi | 79% | 2963 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,076 psi | 69% | 2831 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,658 psi | 73% | 2861 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 44,730 psi | 72% | 2884 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,163 psi | 69% | 2831 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 35,012 psi | 56% | 2710 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 45,078 psi | 72% | 2923 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 50,546 psi | 81% | 2966 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,979 psi | 77% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,037 psi | 77% | 2890 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,134 psi | 69% | 2835 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 37,579 psi | 60% | 2713 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 43,468 psi | 70% | 2861 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 47,181 psi | 76% | 2904 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,732 psi | 77% | 2910 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,337 psi | 69% | 2877 fps | 99% |
| Norma 204 | <<locked>> | 94% | 51,445 psi | 82% | 3051 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 45,600 psi | 73% | 3038 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 34,055 psi | 55% | 2700 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 43,366 psi | 70% | 2894 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 40,799 psi | 65% | 2867 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 50,473 psi | 81% | 2976 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,256 psi | 81% | 2995 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 43% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,901 psi | 67% | 2812 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,934 psi | 75% | 3009 fps | 99.2% |
| ReloadSwiss RS 60 | 62.4 gr | 80% | 37,913 psi | 61% | 2861 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,085 psi | 58% | 2772 fps | 95.7% |
| ReloadSwiss RS 70 | 68.1 gr | 86% | 38,435 psi | 62% | 2851 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 50,995 psi | 82% | 2943 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,730 psi | 72% | 2848 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,189 psi | 61% | 2759 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 98% | 48,167 psi | 77% | 3015 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 44,324 psi | 71% | 2858 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,579 psi | 60% | 2713 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,979 psi | 77% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,134 psi | 69% | 2835 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 43,468 psi | 70% | 2861 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,479 psi | 63% | 2815 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,950 psi | 78% | 2949 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,876 psi | 75% | 2923 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,312 psi | 77% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,408 psi | 65% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,279 psi | 68% | 2772 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 48,080 psi | 77% | 2848 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,820 psi | 78% | 2943 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 38,986 psi | 63% | 2769 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 28,485 psi | 46% | 2582 fps | 96.4% |
| Somchem S385 | <<locked>> | 96% | 45,614 psi | 73% | 2933 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 48,791 psi | 78% | 2838 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,628 psi | 72% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,194 psi | 72% | 2838 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,101 psi | 59% | 2697 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 35,621 psi | 57% | 2703 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 50,705 psi | 81% | 2963 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,700 psi | 70% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,041 psi | 56% | 2700 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 31,952 psi | 51% | 2687 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,880 psi | 53% | 2615 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 51,097 psi | 82% | 3015 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,730 psi | 72% | 2946 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,602 psi | 47% | 2690 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,615 psi | 75% | 2930 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 115 powders for .300 Win. Mag. loaded with the .308 | 150gr | CutEdge Maximus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,205 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | CutEdge Maximus they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.