Load Specifications
Load data in caliber .300 PRC with .31 | 200gr | Lapua D166 bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Hodgdon Retumbo and ReloadSwiss RS 76.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,667 psi | 89% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,158 psi | 85% | 2776 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,317 psi | 85% | 2894 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 56,130 psi | 86% | 2900 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 55,927 psi | 86% | 2838 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 57,276 psi | 88% | 2897 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,561 psi | 79% | 2802 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,021 psi | 71% | 2766 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,101 psi | 86% | 2835 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,144 psi | 86% | 2831 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,000 psi | 88% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,434 psi | 85% | 2825 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,377 psi | 88% | 2894 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,769 psi | 90% | 2854 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,131 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,492 psi | 85% | 2897 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,682 psi | 90% | 2858 fps | 97.4% |
| Bofors RP15 | <<locked>> | 96% | 56,536 psi | 87% | 2877 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,186 psi | 83% | 2874 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 57,377 psi | 88% | 2894 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 57,159 psi | 88% | 2776 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,869 psi | 87% | 2887 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 56,695 psi | 87% | 2828 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,434 psi | 85% | 2785 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,290 psi | 88% | 2838 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,144 psi | 86% | 2822 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,275 psi | 87% | 2753 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,014 psi | 88% | 2999 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,276 psi | 88% | 2871 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 57% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,230 psi | 85% | 2762 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,436 psi | 90% | 2795 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,477 psi | 85% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,986 psi | 89% | 2815 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 55,230 psi | 85% | 2877 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,669 psi | 64% | 2671 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 55,695 psi | 86% | 2743 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,595 psi | 89% | 2792 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,172 psi | 85% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,376 psi | 87% | 2822 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,771 psi | 64% | 2694 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 57,319 psi | 88% | 2913 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,159 psi | 88% | 2808 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,086 psi | 86% | 2897 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 55,970 psi | 86% | 2818 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 58,581 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,189 psi | 59% | 1788 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,071 psi | 85% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,319 psi | 88% | 2881 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,001 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,707 psi | 81% | 2890 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 82% | 58,784 psi | 90% | 2772 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,884 psi | 88% | 2805 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 92% | 58,552 psi | 90% | 2867 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,159 psi | 88% | 2776 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,695 psi | 86% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,595 psi | 89% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,102 psi | 89% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,566 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,102 psi | 89% | 2864 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 58,146 psi | 89% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,363 psi | 90% | 2799 fps | 98.9% |
| Somchem S365 | <<locked>> | 88% | 57,798 psi | 89% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,463 psi | 85% | 2789 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,912 psi | 86% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,769 psi | 90% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,566 psi | 90% | 2822 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 58,015 psi | 89% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,319 psi | 88% | 2835 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,058 psi | 88% | 2910 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 98% | 57,043 psi | 88% | 2894 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 2890 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,407 psi | 90% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,869 psi | 87% | 2831 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,290 psi | 88% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,274 psi | 85% | 2782 fps | 99.6% |
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 3100 | <<locked>> | 80% | 36,042 psi | 55% | 2428 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 48,051 psi | 74% | 2667 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,015 psi | 60% | 2589 fps | 95.6% |
| Accurate MAGPRO | 74.3 gr | 84% | 42,525 psi | 65% | 2654 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 40,059 psi | 62% | 2552 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 38,174 psi | 59% | 2539 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 39,465 psi | 61% | 2569 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 88% | 31,227 psi | 48% | 2415 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,393 psi | 62% | 2552 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,050 psi | 71% | 2674 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,287 psi | 82% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,030 psi | 62% | 2546 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,998 psi | 55% | 2493 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,679 psi | 53% | 2457 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,110 psi | 46% | 2372 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,072 psi | 59% | 2595 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 48,689 psi | 75% | 2690 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 35,824 psi | 55% | 2487 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 36,042 psi | 55% | 2523 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 35,998 psi | 55% | 2493 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,401 psi | 78% | 2671 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 37,710 psi | 58% | 2530 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 49,690 psi | 76% | 2717 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,141 psi | 80% | 2733 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 40,814 psi | 63% | 2549 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,030 psi | 62% | 2533 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,526 psi | 67% | 2559 fps | 100% |
| Hodgdon Retumbo | 70.2 gr | 84% | 33,475 psi | 51% | 2507 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 49,487 psi | 76% | 2746 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 43% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,876 psi | 71% | 2608 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,648 psi | 79% | 2690 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,658 psi | 70% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,856 psi | 61% | 2493 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 84% | 39,479 psi | 61% | 2579 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,885 psi | 60% | 2612 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 49,385 psi | 76% | 2644 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,688 psi | 73% | 2638 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,082 psi | 48% | 2310 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 45,963 psi | 71% | 2644 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 32,053 psi | 49% | 2464 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 37,608 psi | 58% | 2556 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 47,007 psi | 72% | 2654 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,088 psi | 60% | 2585 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 45,861 psi | 71% | 2654 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 32,518 psi | 50% | 2408 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 44% | 1598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,008 psi | 74% | 2690 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,224 psi | 71% | 2710 fps | 100% |
| ReloadSwiss RS 76 | 75.2 gr | 84% | 32,605 psi | 50% | 2484 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,076 psi | 65% | 2690 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 55,027 psi | 85% | 2720 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,365 psi | 64% | 2533 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 39,421 psi | 61% | 2533 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 50,401 psi | 78% | 2671 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,385 psi | 76% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,688 psi | 73% | 2638 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,636 psi | 84% | 2592 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,298 psi | 74% | 2595 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,088 psi | 60% | 2530 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 54,708 psi | 84% | 2713 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,061 psi | 65% | 2520 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 44,280 psi | 68% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,089 psi | 62% | 2520 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 52,373 psi | 81% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,385 psi | 74% | 2648 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,664 psi | 53% | 2392 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 47,834 psi | 74% | 2654 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,841 psi | 60% | 2526 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,553 psi | 62% | 2608 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 88% | 40,770 psi | 63% | 2602 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 94% | 43,526 psi | 67% | 2703 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,529 psi | 73% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,690 psi | 76% | 2717 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,850 psi | 47% | 2480 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,622 psi | 56% | 2444 fps | 96% |
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 76 powders for .300 PRC loaded with the .31 | 200gr | Lapua D166. Hodgdon Retumbo delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,999 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Accurate MAGPRO, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 PRC with the .31 | 200gr | Lapua D166 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.