Load Specifications
Load data in caliber .300 PRC with .308 | 230gr | Sierra MatchKing bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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>> | 90% | 56,449 psi | 87% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,319 psi | 88% | 2618 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,071 psi | 85% | 2703 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 88% | 57,885 psi | 89% | 2684 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,043 psi | 86% | 2700 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,812 psi | 89% | 2726 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 50,140 psi | 77% | 2710 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,301 psi | 80% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,305 psi | 90% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,406 psi | 88% | 2674 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,420 psi | 87% | 2694 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,059 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,812 psi | 89% | 2723 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,665 psi | 84% | 2690 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,172 psi | 85% | 2766 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,695 psi | 87% | 2664 fps | 98.5% |
| Bofors RP15 | <<locked>> | 92% | 55,608 psi | 86% | 2684 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 57,522 psi | 88% | 2740 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 56,420 psi | 87% | 2694 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,421 psi | 90% | 2612 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,680 psi | 86% | 2697 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,465 psi | 90% | 2671 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,477 psi | 85% | 2638 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,189 psi | 90% | 2677 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,508 psi | 90% | 2592 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,869 psi | 87% | 2808 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 58% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,782 psi | 87% | 2605 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,522 psi | 88% | 2608 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,057 psi | 86% | 2618 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 58,218 psi | 90% | 2740 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,790 psi | 74% | 2618 fps | 99.4% |
| Lovex S065 | <<locked>> | 82% | 57,203 psi | 88% | 2582 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,550 psi | 85% | 2582 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,798 psi | 89% | 2621 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,146 psi | 89% | 2667 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 48,631 psi | 75% | 2641 fps | 100% |
| Norma MRP | <<locked>> | 88% | 56,434 psi | 87% | 2710 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,376 psi | 85% | 2598 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,288 psi | 85% | 2707 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 57,972 psi | 89% | 2661 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,551 psi | 89% | 2694 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 59% | 1673 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,276 psi | 88% | 2641 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,782 psi | 86% | 2667 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,479 psi | 88% | 2802 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,710 psi | 87% | 2772 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 88% | 58,697 psi | 90% | 2654 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 88% | 57,276 psi | 88% | 2667 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,421 psi | 90% | 2612 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,203 psi | 88% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,550 psi | 85% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,072 psi | 86% | 2543 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,855 psi | 87% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,333 psi | 87% | 2602 fps | 99.6% |
| Somchem S365 | <<locked>> | 84% | 56,507 psi | 87% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,493 psi | 88% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,058 psi | 88% | 2589 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,188 psi | 88% | 2625 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 55,985 psi | 86% | 2648 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 82% | 56,072 psi | 86% | 2595 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,492 psi | 87% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,970 psi | 86% | 2713 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 94% | 56,347 psi | 87% | 2703 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 98% | 57,493 psi | 88% | 2772 fps | 99.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,363 psi | 90% | 2825 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,159 psi | 86% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,697 psi | 90% | 2671 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,406 psi | 88% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,377 psi | 88% | 2638 fps | 100% |
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% | 40,524 psi | 62% | 2359 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 53,563 psi | 82% | 2566 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,742 psi | 64% | 2474 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 80% | 44,628 psi | 69% | 2477 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 39,813 psi | 61% | 2421 fps | 97.4% |
| ADI AR 2217 | <<locked>> | 84% | 34,011 psi | 52% | 2297 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 46,804 psi | 72% | 2644 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 27,195 psi | 42% | 2159 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,300 psi | 79% | 2572 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,498 psi | 68% | 2470 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,422 psi | 62% | 2428 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,305 psi | 60% | 2379 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,968 psi | 52% | 2320 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,903 psi | 68% | 2526 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 44,164 psi | 68% | 2575 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,237 psi | 68% | 2454 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,739 psi | 58% | 2372 fps | 97.9% |
| Bofors RP30 | <<locked>> | 82% | 33,678 psi | 52% | 2313 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 40,422 psi | 62% | 2428 fps | 98.7% |
| Bofors RP7 | <<locked>> | 80% | 54,955 psi | 85% | 2566 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 32,314 psi | 50% | 2254 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 54,781 psi | 84% | 2618 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,496 psi | 65% | 2425 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,640 psi | 64% | 2408 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,356 psi | 74% | 2457 fps | 100% |
| Hodgdon Retumbo | 66.5 gr | 80% | 33,127 psi | 51% | 2352 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,282 psi | 44% | 1457 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,314 psi | 77% | 2513 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,633 psi | 78% | 2516 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,801 psi | 67% | 2418 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 80% | 38,609 psi | 59% | 2405 fps | 97.2% |
| IMR 8133 Enduron | <<locked>> | 88% | 32,053 psi | 49% | 2293 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 53,867 psi | 83% | 2536 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,301 psi | 80% | 2536 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,012 psi | 54% | 2251 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 50,908 psi | 78% | 2559 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 28,268 psi | 43% | 2211 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 42,757 psi | 66% | 2493 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 52,040 psi | 80% | 2552 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,363 psi | 59% | 2415 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 50,923 psi | 78% | 2562 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,360 psi | 53% | 2306 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,964 psi | 45% | 1493 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,635 psi | 83% | 2592 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,895 psi | 80% | 2615 fps | 100% |
| ReloadSwiss RS 76 | 71.1 gr | 80% | 32,039 psi | 49% | 2326 fps | 98% |
| ReloadSwiss RS 80 | 77.1 gr | 86% | 36,172 psi | 56% | 2405 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 45,614 psi | 70% | 2454 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 44,019 psi | 68% | 2457 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 80% | 54,955 psi | 85% | 2566 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,867 psi | 83% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,301 psi | 80% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,721 psi | 81% | 2497 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,729 psi | 67% | 2457 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 46,253 psi | 71% | 2444 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 49,690 psi | 76% | 2510 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,440 psi | 68% | 2438 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 53,432 psi | 82% | 2543 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,783 psi | 60% | 2329 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 48,936 psi | 75% | 2536 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 52,765 psi | 81% | 2549 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,700 psi | 67% | 2444 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,612 psi | 66% | 2487 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 80% | 35,259 psi | 54% | 2323 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 37,710 psi | 58% | 2425 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 92% | 43,961 psi | 68% | 2582 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,460 psi | 81% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 55,013 psi | 85% | 2621 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,666 psi | 56% | 2428 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,814 psi | 63% | 2375 fps | 98.6% |
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 70 powders for .300 PRC loaded with the .308 | 230gr | Sierra MatchKing. Vihtavuori N570 delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,825 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .300 PRC with the .308 | 230gr | Sierra MatchKing 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.