Load Specifications
Load data in caliber .300 PRC with .308 | 227.5gr | SUS-TAC HPT bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 76, Hodgdon Retumbo and Winchester StaBALL HD.
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 3100 | <<locked>> | 92% | 56,304 psi | 87% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,421 psi | 88% | 2621 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,984 psi | 85% | 2703 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 90% | 58,262 psi | 90% | 2687 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 56,028 psi | 86% | 2700 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,795 psi | 83% | 2671 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,327 psi | 74% | 2638 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,595 psi | 90% | 2674 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,522 psi | 88% | 2677 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,231 psi | 87% | 2697 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,769 psi | 89% | 2657 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,217 psi | 88% | 2723 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,305 psi | 90% | 2746 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,285 psi | 77% | 2690 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,058 psi | 88% | 2667 fps | 98.1% |
| Bofors RP15 | <<locked>> | 94% | 55,419 psi | 85% | 2684 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,913 psi | 88% | 2736 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 56,231 psi | 87% | 2697 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 55,651 psi | 86% | 2575 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,550 psi | 85% | 2694 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 55,347 psi | 85% | 2628 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,682 psi | 89% | 2638 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,782 psi | 86% | 2641 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,363 psi | 90% | 2677 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,566 psi | 90% | 2595 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,985 psi | 86% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,666 psi | 86% | 2664 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,420 psi | 58% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,290 psi | 88% | 2612 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,898 psi | 88% | 2592 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,754 psi | 89% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,608 psi | 87% | 2621 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 94% | 57,943 psi | 89% | 2736 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,947 psi | 68% | 2559 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 57,783 psi | 89% | 2589 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,028 psi | 86% | 2592 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,522 psi | 88% | 2621 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,537 psi | 90% | 2671 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 44,309 psi | 68% | 2582 fps | 99.8% |
| Norma MRP | <<locked>> | 90% | 56,188 psi | 86% | 2713 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,724 psi | 86% | 2605 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,810 psi | 84% | 2703 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 58,204 psi | 90% | 2664 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,145 psi | 88% | 2694 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 59% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,537 psi | 89% | 2648 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,767 psi | 86% | 2674 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,826 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,753 psi | 86% | 2762 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 55,492 psi | 85% | 2608 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 57,305 psi | 88% | 2667 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,651 psi | 86% | 2575 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,783 psi | 89% | 2589 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,028 psi | 86% | 2592 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,855 psi | 87% | 2552 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,869 psi | 87% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,884 psi | 88% | 2605 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 56,521 psi | 87% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,653 psi | 89% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,928 psi | 89% | 2530 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,319 psi | 88% | 2595 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,363 psi | 88% | 2628 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 55,999 psi | 86% | 2644 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 84% | 56,594 psi | 87% | 2605 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,434 psi | 87% | 2638 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,854 psi | 86% | 2713 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 96% | 55,999 psi | 86% | 2703 fps | 99.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,637 psi | 87% | 2762 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,621 psi | 82% | 2759 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,826 psi | 87% | 2559 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,347 psi | 85% | 2628 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,449 psi | 87% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,638 psi | 89% | 2641 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% | 37,884 psi | 58% | 2313 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 50,299 psi | 77% | 2526 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 38,827 psi | 60% | 2418 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,901 psi | 64% | 2428 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 37,405 psi | 58% | 2369 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 33,968 psi | 52% | 2293 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 28,819 psi | 44% | 2208 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,283 psi | 74% | 2530 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,887 psi | 64% | 2425 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,797 psi | 58% | 2379 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,492 psi | 56% | 2333 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,633 psi | 49% | 2270 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,364 psi | 62% | 2474 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,702 psi | 72% | 2628 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 44,672 psi | 69% | 2457 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 35,157 psi | 54% | 2320 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 33,156 psi | 51% | 2306 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,797 psi | 58% | 2379 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 52,402 psi | 81% | 2526 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 32,314 psi | 50% | 2254 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,663 psi | 79% | 2575 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 54,128 psi | 83% | 2585 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 39,842 psi | 61% | 2372 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,189 psi | 60% | 2359 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,498 psi | 70% | 2421 fps | 100% |
| Hodgdon Retumbo | 63.1 gr | 80% | 30,937 psi | 48% | 2293 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 51,648 psi | 79% | 2608 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 43% | 1444 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,718 psi | 73% | 2470 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,635 psi | 83% | 2546 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,674 psi | 73% | 2477 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,452 psi | 64% | 2372 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 36,114 psi | 56% | 2352 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 33,721 psi | 52% | 2343 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 51,082 psi | 79% | 2497 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,516 psi | 76% | 2497 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,735 psi | 50% | 2205 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 48,051 psi | 74% | 2516 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 29,660 psi | 46% | 2257 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 39,624 psi | 61% | 2441 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 49,023 psi | 75% | 2510 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,679 psi | 55% | 2356 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 47,950 psi | 74% | 2520 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,865 psi | 49% | 2251 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 44% | 1476 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,256 psi | 77% | 2549 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,486 psi | 75% | 2569 fps | 100% |
| ReloadSwiss RS 76 | 67.5 gr | 80% | 29,820 psi | 46% | 2267 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,348 psi | 59% | 2461 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 43,033 psi | 66% | 2405 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 41,292 psi | 64% | 2411 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 52,402 psi | 81% | 2526 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,082 psi | 79% | 2497 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,516 psi | 76% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,951 psi | 77% | 2454 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,959 psi | 63% | 2405 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 43,714 psi | 67% | 2398 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 46,470 psi | 71% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,843 psi | 64% | 2392 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 54,288 psi | 84% | 2487 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,502 psi | 78% | 2503 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,361 psi | 56% | 2283 fps | 97.8% |
| Vihtavuori N170 | <<locked>> | 96% | 52,257 psi | 80% | 2589 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 49,806 psi | 77% | 2510 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,915 psi | 63% | 2402 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,639 psi | 61% | 2431 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 34,998 psi | 54% | 2323 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 39,885 psi | 61% | 2474 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 96% | 46,514 psi | 72% | 2638 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,559 psi | 76% | 2464 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,895 psi | 80% | 2579 fps | 100% |
| Winchester StaBALL HD | 64.8 gr | 80% | 33,228 psi | 51% | 2375 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,203 psi | 59% | 2326 fps | 97.7% |
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 79 powders for .300 PRC loaded with the .308 | 227.5gr | SUS-TAC HPT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,802 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 227.5 gr projectile in 0.308" calls for a 1:8.5 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. ReloadSwiss RS 76, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for .300 PRC with the .308 | 227.5gr | SUS-TAC HPT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.