Load Specifications
Load data in caliber .300 PRC with .311 | 150gr | Prvi Partizan FMJ BT 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, Alliant Reloder-26 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 2495 | <<locked>> | 82% | 57,203 psi | 88% | 3054 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,363 psi | 90% | 3127 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,305 psi | 88% | 3173 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 57,696 psi | 89% | 3110 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,216 psi | 85% | 3166 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 58,581 psi | 90% | 3323 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 86% | 57,435 psi | 88% | 3143 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,130 psi | 86% | 3209 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,667 psi | 89% | 3264 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,174 psi | 88% | 3274 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,217 psi | 86% | 3202 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,523 psi | 90% | 3173 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,537 psi | 90% | 3192 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,738 psi | 86% | 3228 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,435 psi | 88% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,463 psi | 85% | 3192 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,855 psi | 87% | 3258 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,722 psi | 83% | 3186 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,630 psi | 72% | 3100 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,421 psi | 90% | 3343 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,938 psi | 80% | 3169 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 55,782 psi | 86% | 3130 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,855 psi | 87% | 3258 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 58,740 psi | 90% | 3173 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 56,130 psi | 86% | 3146 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,276 psi | 88% | 3222 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 56,724 psi | 87% | 3176 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 57,754 psi | 89% | 3205 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,637 psi | 87% | 3182 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,260 psi | 87% | 3146 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,551 psi | 89% | 3189 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,571 psi | 70% | 3130 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 90% | 58,015 psi | 89% | 3261 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 56% | 1998 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,798 psi | 89% | 3150 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,797 psi | 87% | 3127 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,796 psi | 86% | 3104 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 56,333 psi | 87% | 3146 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,753 psi | 87% | 3143 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 55,622 psi | 86% | 3156 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,420 psi | 87% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,492 psi | 85% | 3130 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,926 psi | 85% | 3232 fps | 96.4% |
| Lovex S060 | <<locked>> | 82% | 58,102 psi | 89% | 3110 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,145 psi | 88% | 3120 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,927 psi | 88% | 3140 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 58,378 psi | 90% | 3186 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,398 psi | 73% | 3002 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 58,363 psi | 90% | 3133 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,827 psi | 89% | 3176 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,319 psi | 88% | 3202 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 56,579 psi | 87% | 3287 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 57,305 psi | 88% | 3205 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,158 psi | 85% | 3143 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,738 psi | 86% | 3255 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 56,362 psi | 87% | 3205 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,835 psi | 77% | 3110 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 57% | 2047 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,883 psi | 86% | 3127 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,768 psi | 87% | 3248 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,143 psi | 85% | 3189 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,580 psi | 89% | 3281 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,905 psi | 71% | 3123 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,550 psi | 85% | 3077 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,072 psi | 86% | 3130 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,798 psi | 89% | 3179 fps | 97% |
| Rottweil R 905 | <<locked>> | 98% | 58,566 psi | 90% | 3245 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 58,740 psi | 90% | 3173 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,927 psi | 88% | 3140 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,145 psi | 88% | 3120 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,378 psi | 90% | 3186 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,682 psi | 89% | 3192 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,218 psi | 90% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,710 psi | 87% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,739 psi | 87% | 3091 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,102 psi | 89% | 3238 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% | 56,028 psi | 86% | 3107 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 57,159 psi | 88% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,448 psi | 85% | 3156 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 55,985 psi | 86% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,275 psi | 87% | 3054 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,276 psi | 88% | 3097 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,869 psi | 86% | 3146 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,926 psi | 85% | 3130 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 58,015 psi | 89% | 3097 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,697 psi | 90% | 3205 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,202 psi | 86% | 3215 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,724 psi | 87% | 3274 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,637 psi | 86% | 3107 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,493 psi | 88% | 3225 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,530 psi | 76% | 3251 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,755 psi | 90% | 3173 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,767 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% | 53,577 psi | 82% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,053 psi | 79% | 3002 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 37,869 psi | 58% | 2799 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,763 psi | 78% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,015 psi | 60% | 2851 fps | 97.8% |
| Accurate High Country | <<locked>> | 94% | 50,807 psi | 78% | 3182 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 47,659 psi | 73% | 2976 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 46,050 psi | 71% | 3015 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 50,256 psi | 77% | 3127 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,272 psi | 82% | 3209 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 46,224 psi | 71% | 3015 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,341 psi | 74% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,561 psi | 79% | 3074 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,724 psi | 58% | 2858 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,120 psi | 66% | 2999 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,687 psi | 70% | 3009 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,325 psi | 71% | 3061 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,775 psi | 43% | 2582 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,998 psi | 55% | 2841 fps | 95.8% |
| Alliant Reloder-26 | 77.4 gr | 84% | 34,403 psi | 53% | 2838 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 45,484 psi | 70% | 3041 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,936 psi | 75% | 3015 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,325 psi | 71% | 3061 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,714 psi | 66% | 2867 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,153 psi | 76% | 3025 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 40,886 psi | 63% | 2897 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,801 psi | 67% | 2927 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 54,012 psi | 83% | 3140 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,779 psi | 81% | 3117 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,375 psi | 54% | 2746 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,766 psi | 83% | 3130 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,714 psi | 66% | 3058 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 40,030 psi | 62% | 2907 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 42% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,230 psi | 83% | 3091 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,140 psi | 77% | 3015 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,417 psi | 81% | 3045 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 40,901 psi | 63% | 2844 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,208 psi | 68% | 2904 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 37,463 psi | 58% | 2799 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 52,895 psi | 81% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,127 psi | 80% | 3071 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 51,372 psi | 79% | 3163 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 54,824 psi | 84% | 3058 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,517 psi | 78% | 3012 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,684 psi | 64% | 2848 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 40,016 psi | 62% | 2828 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 36,550 psi | 56% | 2766 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 54,795 psi | 84% | 3074 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,923 psi | 78% | 3061 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,731 psi | 72% | 3005 fps | 95.5% |
| Norma MRP | 78.8 gr | 88% | 39,755 psi | 61% | 2946 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,696 psi | 60% | 2844 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,561 psi | 79% | 3084 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,779 psi | 80% | 3182 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,594 psi | 58% | 2825 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 96% | 42,946 psi | 66% | 2969 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 43% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,153 psi | 76% | 3005 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,803 psi | 70% | 3061 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,827 psi | 60% | 2867 fps | 97.5% |
| ReloadSwiss RS 70 | 73.1 gr | 80% | 37,608 psi | 58% | 2871 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,726 psi | 61% | 2969 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 52,301 psi | 80% | 3025 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,050 psi | 71% | 2956 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,821 psi | 78% | 3058 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 44,831 psi | 69% | 2986 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,714 psi | 66% | 2867 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,684 psi | 64% | 2848 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 50,517 psi | 78% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,016 psi | 62% | 2828 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,282 psi | 73% | 3012 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,723 psi | 84% | 3104 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,992 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% | 44,425 psi | 68% | 2982 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 55,187 psi | 85% | 2999 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,151 psi | 71% | 2953 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 52,475 psi | 81% | 3048 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,085 psi | 54% | 2792 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 42,627 psi | 66% | 2907 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,591 psi | 81% | 2986 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,794 psi | 81% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,193 psi | 68% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,059 psi | 62% | 2844 fps | 98% |
| Vihtavuori N165 | <<locked>> | 92% | 41,959 psi | 65% | 2881 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 51,053 psi | 79% | 2992 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,552 psi | 61% | 2841 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 30,835 psi | 47% | 2671 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 52,852 psi | 81% | 3202 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,204 psi | 60% | 2812 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,060 psi | 63% | 2900 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,152 psi | 43% | 2680 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,766 psi | 84% | 3110 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,092 psi | 69% | 2953 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 .311 | 150gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,343 fps; across all powders the maximum-charge window runs from 1,998 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 0.311" calls for a 1:14.0 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, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for .300 PRC with the .311 | 150gr | Prvi Partizan FMJ BT 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.