Load Specifications
Load data in caliber .300 PRC with .308 | 226gr | Peregrine Glider GRM 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 Alliant Reloder-26.
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% | 57,972 psi | 89% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,477 psi | 85% | 2612 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,724 psi | 87% | 2743 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 90% | 56,521 psi | 87% | 2677 fps | 100% |
| ADI AR 2213 | <<locked>> | 94% | 58,160 psi | 89% | 2743 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,025 psi | 80% | 2654 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,441 psi | 71% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,811 psi | 87% | 2661 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,667 psi | 89% | 2671 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,782 psi | 86% | 2664 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,160 psi | 89% | 2733 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,767 psi | 86% | 2644 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,158 psi | 85% | 2710 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,043 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 48,051 psi | 74% | 2664 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,492 psi | 85% | 2651 fps | 97.7% |
| Bofors RP15 | <<locked>> | 96% | 57,014 psi | 88% | 2717 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,534 psi | 84% | 2713 fps | 99.8% |
| Bofors RP5 | <<locked>> | 94% | 58,160 psi | 89% | 2733 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 57,609 psi | 89% | 2612 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,493 psi | 88% | 2733 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 57,232 psi | 88% | 2664 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,043 psi | 86% | 2625 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 57,885 psi | 89% | 2680 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,637 psi | 87% | 2664 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,695 psi | 87% | 2585 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,928 psi | 89% | 2841 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,856 psi | 89% | 2707 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,333 psi | 57% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,912 psi | 86% | 2605 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,405 psi | 85% | 2582 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,825 psi | 86% | 2602 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,479 psi | 90% | 2661 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 94% | 56,028 psi | 86% | 2720 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,800 psi | 64% | 2530 fps | 97.9% |
| Lovex S065 | <<locked>> | 84% | 56,014 psi | 86% | 2579 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,870 psi | 89% | 2628 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,274 psi | 85% | 2605 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,797 psi | 87% | 2657 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 42,163 psi | 65% | 2556 fps | 99.6% |
| Norma MRP | <<locked>> | 92% | 58,030 psi | 89% | 2749 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,580 psi | 89% | 2641 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,869 psi | 87% | 2743 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 86% | 56,405 psi | 87% | 2654 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,071 psi | 85% | 2677 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 59% | 1660 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,506 psi | 85% | 2635 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,030 psi | 89% | 2713 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,229 psi | 82% | 2736 fps | 99% |
| Rottweil R 904 | <<locked>> | 90% | 57,537 psi | 89% | 2648 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 90% | 55,419 psi | 85% | 2654 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 57,609 psi | 89% | 2612 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,014 psi | 86% | 2579 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,870 psi | 89% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,450 psi | 90% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,172 psi | 85% | 2539 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,998 psi | 85% | 2651 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 58,508 psi | 90% | 2592 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 55,216 psi | 85% | 2592 fps | 99.2% |
| Somchem S365 | <<locked>> | 88% | 58,334 psi | 90% | 2644 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,738 psi | 86% | 2628 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,130 psi | 86% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,738 psi | 86% | 2589 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,521 psi | 85% | 2615 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,638 psi | 89% | 2677 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 86% | 58,436 psi | 90% | 2641 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,769 psi | 89% | 2667 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,740 psi | 89% | 2753 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 98% | 57,653 psi | 89% | 2736 fps | 99.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,549 psi | 84% | 2743 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,329 psi | 79% | 2730 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,926 psi | 85% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,232 psi | 88% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,189 psi | 90% | 2776 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,579 psi | 86% | 2625 fps | 99.9% |
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% | 36,013 psi | 55% | 2290 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 48,399 psi | 74% | 2510 fps | 100% |
| Accurate MAGPRO | 67.9 gr | 82% | 39,697 psi | 61% | 2448 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 40,306 psi | 62% | 2408 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 35,853 psi | 55% | 2346 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 34,621 psi | 53% | 2320 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 29,211 psi | 45% | 2231 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,514 psi | 72% | 2516 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,853 psi | 83% | 2621 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,422 psi | 62% | 2408 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,056 psi | 55% | 2352 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,838 psi | 54% | 2313 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,052 psi | 46% | 2241 fps | 98.2% |
| Alliant Reloder-26 | 67 gr | 80% | 38,334 psi | 59% | 2451 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 44,759 psi | 69% | 2602 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,108 psi | 71% | 2493 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 33,620 psi | 52% | 2297 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 33,692 psi | 52% | 2333 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,056 psi | 55% | 2352 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 50,691 psi | 78% | 2513 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 33,011 psi | 51% | 2283 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 50,096 psi | 77% | 2562 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 52,489 psi | 81% | 2572 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 38,276 psi | 59% | 2352 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,623 psi | 58% | 2336 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,743 psi | 67% | 2405 fps | 100% |
| Hodgdon Retumbo | 64.3 gr | 82% | 31,459 psi | 48% | 2320 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 49,850 psi | 77% | 2592 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 43% | 1444 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,137 psi | 71% | 2457 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,127 psi | 80% | 2536 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,832 psi | 71% | 2461 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,001 psi | 62% | 2352 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 80% | 34,534 psi | 53% | 2326 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 34,258 psi | 53% | 2365 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 49,588 psi | 76% | 2487 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,935 psi | 74% | 2484 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 30,951 psi | 48% | 2175 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 46,369 psi | 71% | 2500 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 29,936 psi | 46% | 2277 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 37,942 psi | 58% | 2418 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 47,413 psi | 73% | 2497 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,011 psi | 52% | 2329 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 46,238 psi | 71% | 2503 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,168 psi | 46% | 2221 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 44% | 1480 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,298 psi | 74% | 2533 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,644 psi | 72% | 2552 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 28,195 psi | 43% | 2228 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,262 psi | 60% | 2490 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 41,669 psi | 64% | 2392 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,711 psi | 61% | 2392 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 50,691 psi | 78% | 2513 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,588 psi | 76% | 2487 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,935 psi | 74% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,143 psi | 85% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,443 psi | 75% | 2441 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,392 psi | 61% | 2388 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 54,998 psi | 85% | 2546 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,177 psi | 65% | 2379 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 44,512 psi | 68% | 2454 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,059 psi | 62% | 2372 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 52,750 psi | 81% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,950 psi | 75% | 2493 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,882 psi | 54% | 2264 fps | 97.2% |
| Vihtavuori N170 | <<locked>> | 98% | 53,867 psi | 83% | 2625 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 48,051 psi | 74% | 2497 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,914 psi | 60% | 2379 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,058 psi | 59% | 2411 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 35,520 psi | 55% | 2349 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 92% | 40,785 psi | 63% | 2503 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 98% | 47,834 psi | 74% | 2671 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,921 psi | 74% | 2454 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,096 psi | 77% | 2562 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,154 psi | 48% | 2346 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,724 psi | 56% | 2306 fps | 97.2% |
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 76 powders for .300 PRC loaded with the .308 | 226gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,841 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 226.0 gr projectile in 0.308" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, Alliant Reloder-26 rank at the top here: for .300 PRC with the .308 | 226gr | Peregrine Glider GRM 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.