Load Specifications
Load data in caliber .300 PRC 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 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% | 55,434 psi | 85% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,058 psi | 88% | 3114 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,506 psi | 85% | 3150 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,840 psi | 86% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,595 psi | 89% | 3212 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,334 psi | 90% | 3304 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 58,653 psi | 90% | 3186 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,492 psi | 87% | 3136 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,114 psi | 85% | 3199 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,623 psi | 87% | 3251 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,101 psi | 86% | 3264 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,188 psi | 88% | 3156 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,421 psi | 88% | 3182 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,450 psi | 90% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,043 psi | 86% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,059 psi | 89% | 3241 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,608 psi | 86% | 3245 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,446 psi | 81% | 3169 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,440 psi | 70% | 3081 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,710 psi | 87% | 3320 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,749 psi | 78% | 3153 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 58,160 psi | 89% | 3173 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,608 psi | 86% | 3245 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 57,435 psi | 88% | 3156 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 58,610 psi | 90% | 3192 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,115 psi | 86% | 3209 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 55,738 psi | 86% | 3166 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 56,695 psi | 87% | 3192 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 58,726 psi | 90% | 3189 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,217 psi | 86% | 3176 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,637 psi | 87% | 3245 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 56% | 1998 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,826 psi | 87% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,767 psi | 86% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 58,465 psi | 90% | 3153 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 58,726 psi | 90% | 3192 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,608 psi | 86% | 3130 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 58,044 psi | 89% | 3202 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,259 psi | 85% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,117 psi | 89% | 3179 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,795 psi | 83% | 3215 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 57,203 psi | 88% | 3104 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,985 psi | 86% | 3107 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,753 psi | 86% | 3127 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 57,130 psi | 88% | 3169 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,905 psi | 71% | 2982 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 57,130 psi | 88% | 3120 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,856 psi | 89% | 3117 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,666 psi | 87% | 3166 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,057 psi | 86% | 3189 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 55,303 psi | 85% | 3271 fps | 99% |
| Norma URP | <<locked>> | 92% | 56,101 psi | 86% | 3196 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,885 psi | 89% | 3192 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,317 psi | 84% | 3235 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,027 psi | 85% | 3189 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,544 psi | 75% | 3094 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 57% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,624 psi | 90% | 3179 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,405 psi | 85% | 3232 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,566 psi | 89% | 3235 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,202 psi | 86% | 3264 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,469 psi | 68% | 3097 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 57,711 psi | 89% | 3120 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,204 psi | 90% | 3169 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,550 psi | 87% | 3166 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 57,363 psi | 88% | 3232 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 57,435 psi | 88% | 3156 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,753 psi | 86% | 3127 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 55,985 psi | 86% | 3107 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,130 psi | 88% | 3169 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,362 psi | 87% | 3176 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,203 psi | 88% | 3153 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,914 psi | 89% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,506 psi | 85% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,347 psi | 85% | 3074 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,884 psi | 88% | 3225 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 57,624 psi | 89% | 3041 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,088 psi | 89% | 3166 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,784 psi | 90% | 3159 fps | 96.5% |
| Somchem S365 | <<locked>> | 94% | 55,593 psi | 86% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,870 psi | 89% | 3199 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 58,494 psi | 90% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,291 psi | 90% | 3077 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,653 psi | 90% | 3094 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,912 psi | 86% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,436 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,563 psi | 82% | 3110 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,927 psi | 88% | 3087 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,479 psi | 88% | 3192 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,349 psi | 90% | 3255 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,521 psi | 85% | 3258 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,523 psi | 90% | 3153 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,333 psi | 87% | 3212 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,863 psi | 74% | 3228 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,450 psi | 88% | 3156 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,523 psi | 90% | 3199 fps | 98.2% |
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% | 51,822 psi | 80% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,024 psi | 77% | 2989 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 36,274 psi | 56% | 2769 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,110 psi | 76% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,579 psi | 58% | 2825 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 98% | 54,259 psi | 83% | 3235 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 55,013 psi | 85% | 3127 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,717 psi | 72% | 2963 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 44,860 psi | 69% | 2995 fps | 95% |
| ADI AR 2213 | <<locked>> | 98% | 52,649 psi | 81% | 3179 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,185 psi | 80% | 3199 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,210 psi | 73% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,430 psi | 78% | 3064 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,709 psi | 56% | 2838 fps | 97.5% |
| Alliant Reloder-17 | 71.9 gr | 80% | 41,843 psi | 64% | 2979 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,614 psi | 69% | 2992 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,150 psi | 69% | 3041 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,558 psi | 44% | 2615 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,737 psi | 53% | 2812 fps | 95.1% |
| Alliant Reloder-26 | 77.4 gr | 84% | 33,127 psi | 51% | 2805 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 44,309 psi | 68% | 3022 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 47,398 psi | 73% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,150 psi | 69% | 3041 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,640 psi | 64% | 2851 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,935 psi | 74% | 3009 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,784 psi | 61% | 2881 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 45,716 psi | 70% | 2976 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 52,736 psi | 81% | 3123 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,084 psi | 52% | 2720 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,460 psi | 81% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,785 psi | 64% | 2956 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 42% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,272 psi | 82% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,124 psi | 76% | 3002 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,488 psi | 79% | 3031 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 42,598 psi | 66% | 2890 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,279 psi | 67% | 2890 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 36,071 psi | 55% | 2772 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 51,764 psi | 80% | 3094 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,534 psi | 84% | 3120 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 98% | 50,256 psi | 77% | 3146 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 53,708 psi | 83% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,139 psi | 76% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,567 psi | 62% | 2831 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 38,711 psi | 60% | 2802 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 37,507 psi | 58% | 2799 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,548 psi | 82% | 3064 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,447 psi | 84% | 3064 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,806 psi | 77% | 3048 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,484 psi | 70% | 2989 fps | 95.1% |
| Norma MRP | <<locked>> | 90% | 41,292 psi | 64% | 2989 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,420 psi | 58% | 2822 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,473 psi | 78% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 50,386 psi | 78% | 3159 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,390 psi | 56% | 2802 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 96% | 41,742 psi | 64% | 2946 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 42% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,863 psi | 74% | 2989 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,498 psi | 68% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,579 psi | 58% | 2841 fps | 97.1% |
| ReloadSwiss RS 70 | 73.1 gr | 80% | 36,521 psi | 56% | 2848 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,379 psi | 64% | 3022 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,908 psi | 78% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,512 psi | 68% | 2933 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,777 psi | 77% | 3041 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 43,642 psi | 67% | 2969 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,640 psi | 64% | 2851 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,567 psi | 62% | 2831 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 49,139 psi | 76% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,711 psi | 60% | 2802 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,992 psi | 71% | 2995 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,505 psi | 82% | 3091 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,433 psi | 84% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,021 psi | 71% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,653 psi | 61% | 2769 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,325 psi | 71% | 3028 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 54,114 psi | 83% | 2992 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,918 psi | 69% | 2936 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 54,723 psi | 84% | 3094 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,866 psi | 52% | 2769 fps | 99.1% |
| Somchem S385 | <<locked>> | 88% | 41,379 psi | 64% | 2887 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 55,056 psi | 85% | 2979 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,416 psi | 79% | 2976 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,547 psi | 79% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,873 psi | 66% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,943 psi | 60% | 2825 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 43,700 psi | 67% | 2923 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,937 psi | 77% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,377 psi | 59% | 2822 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 31,560 psi | 49% | 2697 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 51,677 psi | 80% | 3186 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,189 psi | 59% | 2792 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 39,784 psi | 61% | 2881 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,963 psi | 41% | 2638 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,650 psi | 83% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,079 psi | 72% | 2999 fps | 95.8% |
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 103 powders for .300 PRC loaded with the .308 | 150gr | CutEdge Maximus. Alliant Reloder-26 delivers the highest muzzle velocity at 3,320 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,320 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, 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 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 PRC with the .308 | 150gr | CutEdge Maximus they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.