Load Specifications
Load data in caliber .300 PRC with .308 | 150gr | Remington SP Core-Lokt bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 and Alliant Reloder-26.
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 2495 | <<locked>> | 82% | 57,232 psi | 88% | 3054 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,349 psi | 90% | 3127 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,305 psi | 88% | 3173 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 57,740 psi | 89% | 3114 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,230 psi | 85% | 3169 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,766 psi | 84% | 3261 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 86% | 57,464 psi | 88% | 3143 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,159 psi | 86% | 3212 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,914 psi | 89% | 3268 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,464 psi | 88% | 3281 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,449 psi | 87% | 3209 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,595 psi | 90% | 3173 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,798 psi | 90% | 3196 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,970 psi | 86% | 3232 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,479 psi | 88% | 3258 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,680 psi | 86% | 3199 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,087 psi | 88% | 3264 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,969 psi | 83% | 3189 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,818 psi | 72% | 3107 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,421 psi | 90% | 3343 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,170 psi | 80% | 3176 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 56,043 psi | 86% | 3136 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,087 psi | 88% | 3264 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 58,784 psi | 90% | 3173 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 56,115 psi | 86% | 3150 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,508 psi | 88% | 3225 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 56,768 psi | 87% | 3179 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 58,015 psi | 89% | 3209 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,608 psi | 87% | 3186 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,275 psi | 87% | 3146 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,551 psi | 89% | 3189 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,759 psi | 70% | 3133 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 90% | 58,001 psi | 89% | 3261 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 56% | 2001 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,812 psi | 89% | 3150 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,014 psi | 88% | 3130 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,825 psi | 86% | 3104 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 56,333 psi | 87% | 3146 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,768 psi | 87% | 3143 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 55,622 psi | 86% | 3159 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,637 psi | 87% | 3173 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,477 psi | 85% | 3130 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,187 psi | 85% | 3235 fps | 96.5% |
| Lovex S060 | <<locked>> | 82% | 58,146 psi | 89% | 3110 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,188 psi | 88% | 3120 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,145 psi | 88% | 3143 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 58,566 psi | 90% | 3186 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,630 psi | 73% | 3005 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 58,392 psi | 90% | 3133 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,073 psi | 89% | 3179 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,348 psi | 88% | 3205 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 56,855 psi | 87% | 3291 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 57,566 psi | 89% | 3212 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,419 psi | 85% | 3150 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,767 psi | 86% | 3255 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 56,391 psi | 87% | 3205 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,009 psi | 77% | 3114 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 57% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,130 psi | 86% | 3133 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,826 psi | 87% | 3248 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,187 psi | 85% | 3189 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,609 psi | 89% | 3284 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,035 psi | 71% | 3130 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,564 psi | 85% | 3081 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,072 psi | 86% | 3130 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,827 psi | 89% | 3182 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 55,013 psi | 85% | 3186 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 58,784 psi | 90% | 3173 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,145 psi | 88% | 3143 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,188 psi | 88% | 3120 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,566 psi | 90% | 3186 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,696 psi | 89% | 3192 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,494 psi | 90% | 3166 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,710 psi | 87% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,782 psi | 87% | 3091 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,349 psi | 90% | 3245 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 58,711 psi | 90% | 3051 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,927 psi | 86% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,057 psi | 86% | 3107 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 57,174 psi | 88% | 3212 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,651 psi | 86% | 3159 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 56,014 psi | 86% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,289 psi | 87% | 3054 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,334 psi | 88% | 3097 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,883 psi | 86% | 3146 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,940 psi | 85% | 3127 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 58,059 psi | 89% | 3097 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,114 psi | 85% | 3150 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,463 psi | 87% | 3219 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,942 psi | 88% | 3278 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,666 psi | 86% | 3107 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,508 psi | 88% | 3225 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,559 psi | 76% | 3255 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,784 psi | 90% | 3173 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,738 psi | 86% | 3150 fps | 97.7% |
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% | 53,592 psi | 82% | 3002 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,111 psi | 79% | 3002 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 37,927 psi | 58% | 2802 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,778 psi | 78% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,030 psi | 60% | 2851 fps | 97.8% |
| Accurate High Country | <<locked>> | 94% | 51,039 psi | 79% | 3189 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,688 psi | 73% | 2976 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 46,079 psi | 71% | 3018 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 50,430 psi | 78% | 3130 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,287 psi | 82% | 3212 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 46,267 psi | 71% | 3018 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,399 psi | 74% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,605 psi | 79% | 3077 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,768 psi | 58% | 2858 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,178 psi | 66% | 3002 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,716 psi | 70% | 3009 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,354 psi | 71% | 3064 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,833 psi | 43% | 2582 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,013 psi | 55% | 2841 fps | 95.8% |
| Alliant Reloder-26 | 77.6 gr | 84% | 34,592 psi | 53% | 2844 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 45,701 psi | 70% | 3045 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,979 psi | 75% | 3015 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,354 psi | 71% | 3064 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,917 psi | 66% | 2874 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,153 psi | 76% | 3025 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 40,944 psi | 63% | 2900 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,859 psi | 67% | 2927 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 53,998 psi | 83% | 3140 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,968 psi | 81% | 3120 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,389 psi | 54% | 2746 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,780 psi | 83% | 3130 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,888 psi | 66% | 3061 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,045 psi | 62% | 2907 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 42% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,288 psi | 84% | 3094 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,169 psi | 77% | 3015 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,431 psi | 81% | 3045 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 41,075 psi | 63% | 2851 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,222 psi | 68% | 2904 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 37,492 psi | 58% | 2799 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 52,953 psi | 81% | 3110 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,098 psi | 80% | 3071 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 51,590 psi | 79% | 3169 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 54,853 psi | 84% | 3061 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,575 psi | 78% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,727 psi | 64% | 2851 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 40,074 psi | 62% | 2828 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 36,724 psi | 56% | 2772 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 54,810 psi | 84% | 3077 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,966 psi | 78% | 3064 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,746 psi | 72% | 3009 fps | 95.5% |
| Norma MRP | 78.9 gr | 88% | 39,798 psi | 61% | 2946 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,769 psi | 60% | 2844 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,590 psi | 79% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,298 psi | 74% | 3114 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,652 psi | 58% | 2825 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 43,105 psi | 66% | 2972 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 43% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,153 psi | 76% | 3005 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,832 psi | 71% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,885 psi | 60% | 2867 fps | 97.5% |
| ReloadSwiss RS 70 | 73.2 gr | 80% | 37,608 psi | 58% | 2874 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,885 psi | 61% | 2976 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,373 psi | 81% | 3028 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,093 psi | 71% | 2956 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,792 psi | 78% | 3054 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 44,817 psi | 69% | 2989 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,917 psi | 66% | 2874 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,727 psi | 64% | 2851 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 50,575 psi | 78% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,074 psi | 62% | 2828 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,297 psi | 73% | 3012 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,737 psi | 84% | 3107 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,021 psi | 72% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,944 psi | 63% | 2789 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,469 psi | 68% | 2982 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 55,230 psi | 85% | 3002 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,166 psi | 71% | 2953 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 52,460 psi | 81% | 3048 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,273 psi | 54% | 2799 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 42,641 psi | 66% | 2910 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,649 psi | 81% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,837 psi | 81% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,208 psi | 68% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,074 psi | 62% | 2848 fps | 98% |
| Vihtavuori N165 | <<locked>> | 92% | 42,177 psi | 65% | 2884 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 51,082 psi | 79% | 2992 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,595 psi | 61% | 2844 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 30,879 psi | 48% | 2671 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 53,113 psi | 82% | 3209 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,363 psi | 61% | 2812 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,118 psi | 63% | 2907 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,166 psi | 43% | 2680 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,998 psi | 85% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,252 psi | 70% | 2956 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 95 powders for .300 PRC loaded with the .308 | 150gr | Remington SP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 3,343 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,343 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Norma MRP, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 PRC with the .308 | 150gr | Remington SP Core-Lokt 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.