Load Specifications
Load data in caliber .300 PRC with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Hodgdon Retumbo.
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% | 57,754 psi | 89% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,955 psi | 85% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,594 psi | 87% | 2910 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 56,101 psi | 86% | 2844 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 57,783 psi | 89% | 2910 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,750 psi | 80% | 2815 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,180 psi | 71% | 2776 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,202 psi | 86% | 2841 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,362 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,319 psi | 88% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,535 psi | 85% | 2835 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,769 psi | 89% | 2904 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,419 psi | 85% | 2815 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,784 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,840 psi | 86% | 2904 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,463 psi | 85% | 2818 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 56,913 psi | 88% | 2890 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,563 psi | 84% | 2884 fps | 99.4% |
| Bofors RP5 | <<locked>> | 94% | 57,769 psi | 89% | 2904 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 57,174 psi | 88% | 2785 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,334 psi | 88% | 2904 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 56,855 psi | 87% | 2841 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,782 psi | 86% | 2799 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 57,508 psi | 88% | 2851 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,391 psi | 87% | 2831 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,521 psi | 87% | 2762 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,566 psi | 89% | 3015 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,551 psi | 89% | 2877 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 57% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,434 psi | 85% | 2776 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,798 psi | 90% | 2808 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,608 psi | 86% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,262 psi | 90% | 2828 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 55,753 psi | 86% | 2890 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,669 psi | 64% | 2674 fps | 96.9% |
| Lovex S065 | <<locked>> | 84% | 55,854 psi | 86% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,479 psi | 88% | 2799 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,682 psi | 90% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,521 psi | 87% | 2831 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 41,959 psi | 65% | 2703 fps | 98.9% |
| Norma MRP | <<locked>> | 92% | 57,943 psi | 89% | 2927 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,188 psi | 88% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,507 psi | 87% | 2910 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 56,101 psi | 86% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,839 psi | 84% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 59% | 1795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,317 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,696 psi | 89% | 2890 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,301 psi | 82% | 2900 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 82% | 58,769 psi | 90% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,261 psi | 88% | 2818 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 55,245 psi | 85% | 2825 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,174 psi | 88% | 2785 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,854 psi | 86% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,479 psi | 88% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,160 psi | 89% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,624 psi | 90% | 2762 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,610 psi | 90% | 2877 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 58,175 psi | 89% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,813 psi | 90% | 2815 fps | 99.1% |
| Somchem S365 | <<locked>> | 88% | 57,943 psi | 89% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,579 psi | 86% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 55,956 psi | 86% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,288 psi | 85% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,303 psi | 85% | 2782 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 58,059 psi | 89% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,435 psi | 88% | 2841 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,682 psi | 89% | 2927 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 98% | 57,305 psi | 88% | 2904 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,244 psi | 83% | 2904 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,697 psi | 90% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,072 psi | 88% | 2844 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,754 psi | 89% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,376 psi | 85% | 2792 fps | 99.7% |
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 3100 | <<locked>> | 80% | 35,636 psi | 55% | 2428 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 47,906 psi | 74% | 2671 fps | 100% |
| Accurate MAGPRO | 76.1 gr | 84% | 42,409 psi | 65% | 2654 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 40,118 psi | 62% | 2559 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 38,218 psi | 59% | 2546 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 39,436 psi | 61% | 2575 fps | 96% |
| ADI AR 2225 | <<locked>> | 88% | 31,053 psi | 48% | 2415 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,393 psi | 62% | 2559 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,108 psi | 71% | 2680 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,592 psi | 82% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,030 psi | 62% | 2552 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,868 psi | 55% | 2493 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,447 psi | 53% | 2454 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,892 psi | 46% | 2372 fps | 97% |
| Alliant Reloder-26 | 73.3 gr | 80% | 38,014 psi | 58% | 2595 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 48,936 psi | 75% | 2703 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 35,708 psi | 55% | 2490 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 35,853 psi | 55% | 2523 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 35,868 psi | 55% | 2493 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,459 psi | 78% | 2680 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 88% | 37,695 psi | 58% | 2539 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 49,719 psi | 76% | 2726 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,301 psi | 80% | 2743 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 40,770 psi | 63% | 2552 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,089 psi | 62% | 2539 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,439 psi | 67% | 2566 fps | 100% |
| Hodgdon Retumbo | 72 gr | 84% | 33,301 psi | 51% | 2507 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 49,559 psi | 76% | 2756 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 43% | 1565 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,948 psi | 71% | 2615 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,837 psi | 80% | 2703 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 45,629 psi | 70% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,842 psi | 61% | 2500 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 84% | 39,320 psi | 60% | 2585 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,001 psi | 60% | 2618 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 49,182 psi | 76% | 2648 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,630 psi | 73% | 2644 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 30,574 psi | 47% | 2303 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 45,977 psi | 71% | 2654 fps | 98.4% |
| Norma 217 | <<locked>> | 92% | 31,821 psi | 49% | 2461 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 37,608 psi | 58% | 2559 fps | 97.9% |
| Norma URP | <<locked>> | 80% | 47,065 psi | 72% | 2661 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,390 psi | 56% | 2530 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 45,832 psi | 71% | 2661 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 32,271 psi | 50% | 2408 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 44% | 1601 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,080 psi | 74% | 2697 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,427 psi | 71% | 2717 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,372 psi | 50% | 2480 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,293 psi | 65% | 2697 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 55,042 psi | 85% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,394 psi | 64% | 2539 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 39,378 psi | 61% | 2539 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 50,459 psi | 78% | 2680 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,182 psi | 76% | 2648 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,630 psi | 73% | 2644 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,723 psi | 84% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,225 psi | 74% | 2605 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,044 psi | 60% | 2533 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 54,563 psi | 84% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,018 psi | 65% | 2530 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 44,295 psi | 68% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,885 psi | 61% | 2523 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 52,402 psi | 81% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,486 psi | 75% | 2654 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,505 psi | 53% | 2398 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 47,761 psi | 73% | 2657 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,638 psi | 59% | 2530 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,567 psi | 62% | 2615 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 88% | 40,683 psi | 63% | 2605 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 43,700 psi | 67% | 2713 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,645 psi | 73% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,908 psi | 77% | 2730 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,719 psi | 47% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,477 psi | 56% | 2448 fps | 96.1% |
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 75 powders for .300 PRC loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Hodgdon Retumbo delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,752 fps to 3,015 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 1:12.0 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, Alliant Reloder-26, Hodgdon Retumbo rank at the top here: for .300 PRC with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.