Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 200gr | Peregrine VRG-3 bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Ramshot Grand.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2700 | <<locked>> | 84% | 53,142 psi | 85% | 2615 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 53,853 psi | 86% | 2707 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,737 psi | 88% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,028 psi | 90% | 2746 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,359 psi | 86% | 2799 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 54,853 psi | 88% | 2667 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,461 psi | 86% | 2746 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 54,694 psi | 88% | 2799 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,405 psi | 60% | 2530 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,782 psi | 89% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,072 psi | 90% | 2710 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,447 psi | 86% | 2749 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,694 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,434 psi | 90% | 2789 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,940 psi | 86% | 2795 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,650 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,253 psi | 76% | 2717 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,027 psi | 88% | 2861 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2776 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 52,997 psi | 85% | 2651 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,105 psi | 69% | 2641 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 53,940 psi | 86% | 2795 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 55,927 psi | 90% | 2700 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 43,627 psi | 70% | 2602 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 53,490 psi | 86% | 2674 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,753 psi | 89% | 2766 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 56,144 psi | 90% | 2740 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 53,795 psi | 86% | 2726 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,795 psi | 86% | 2726 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,751 psi | 86% | 2677 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,303 psi | 89% | 2710 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2762 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 88% | 54,708 psi | 88% | 2785 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 59% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,636 psi | 88% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,041 psi | 87% | 2644 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,927 psi | 90% | 2674 fps | 99.8% |
| IMR 4350 | <<locked>> | 90% | 53,853 psi | 86% | 2687 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,186 psi | 87% | 2674 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 53,969 psi | 87% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,188 psi | 90% | 2730 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 52,605 psi | 84% | 2779 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,636 psi | 88% | 2641 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,288 psi | 87% | 2671 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,651 psi | 89% | 2713 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,979 psi | 77% | 2618 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 55,361 psi | 89% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,404 psi | 87% | 2736 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 53,592 psi | 86% | 2815 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 54,781 psi | 88% | 2733 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,246 psi | 90% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,144 psi | 90% | 2844 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 53,548 psi | 86% | 2736 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 52,692 psi | 84% | 2762 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,275 psi | 60% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,185 psi | 85% | 2661 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,201 psi | 87% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,072 psi | 90% | 2772 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,476 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,180 psi | 74% | 2756 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 53,330 psi | 86% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,984 psi | 88% | 2717 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 96% | 55,811 psi | 89% | 2776 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 88% | 55,927 psi | 90% | 2700 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,288 psi | 87% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,636 psi | 88% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,651 psi | 89% | 2713 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,998 psi | 88% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,027 psi | 87% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,722 psi | 86% | 2628 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,347 psi | 89% | 2772 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 53,243 psi | 85% | 2648 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,895 psi | 85% | 2657 fps | 97.2% |
| Somchem S365 | <<locked>> | 92% | 54,520 psi | 87% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,362 psi | 90% | 2753 fps | 99.7% |
| Unknown powder | <<locked>> | 88% | 55,361 psi | 89% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,333 psi | 90% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,071 psi | 88% | 2635 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,709 psi | 89% | 2707 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,737 psi | 86% | 2700 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 56,014 psi | 90% | 2641 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,927 psi | 90% | 2749 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,577 psi | 86% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,317 psi | 87% | 2822 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,153 psi | 79% | 2720 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,434 psi | 90% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,753 psi | 89% | 2766 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2841 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,259 psi | 87% | 2717 fps | 99% |
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 2700 | <<locked>> | 80% | 46,543 psi | 75% | 2510 fps | 98.4% |
| Accurate 3100 | <<locked>> | 82% | 31,053 psi | 50% | 2283 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,372 psi | 82% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,523 psi | 63% | 2477 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 96% | 49,458 psi | 79% | 2733 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,631 psi | 78% | 2572 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,392 psi | 62% | 2467 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 92% | 44,701 psi | 72% | 2625 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 98% | 34,983 psi | 56% | 2470 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,182 psi | 79% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,431 psi | 84% | 2657 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,464 psi | 62% | 2490 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,932 psi | 70% | 2605 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,145 psi | 61% | 2464 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,479 psi | 62% | 2513 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,137 psi | 45% | 2260 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,936 psi | 48% | 2326 fps | 95.7% |
| Alliant Reloder-26 | 61.6 gr | 80% | 30,066 psi | 48% | 2369 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 37,971 psi | 61% | 2500 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 49,676 psi | 80% | 2605 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,118 psi | 64% | 2579 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 38,479 psi | 62% | 2513 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 43,453 psi | 70% | 2493 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 98% | 40,799 psi | 65% | 2543 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,937 psi | 80% | 2621 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,223 psi | 73% | 2595 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,959 psi | 66% | 2477 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 94% | 44,411 psi | 71% | 2569 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,772 psi | 70% | 2556 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,114 psi | 58% | 2388 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,663 psi | 83% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,884 psi | 61% | 2572 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 40,654 psi | 65% | 2546 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 44% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,300 psi | 82% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,776 psi | 77% | 2549 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,644 psi | 75% | 2526 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 39,030 psi | 63% | 2428 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,020 psi | 72% | 2523 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 34,447 psi | 55% | 2359 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,671 psi | 70% | 2520 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 42,772 psi | 69% | 2598 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 51,300 psi | 82% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,322 psi | 68% | 2474 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 40,509 psi | 65% | 2457 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 30,298 psi | 49% | 2264 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 51,750 psi | 83% | 2644 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,595 psi | 62% | 2451 fps | 95.3% |
| Norma MRP | 62.8 gr | 84% | 34,954 psi | 56% | 2461 fps | 96% |
| Norma URP | <<locked>> | 80% | 39,349 psi | 63% | 2474 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 52,562 psi | 84% | 2674 fps | 100% |
| Ramshot Grand | 67.9 gr | 88% | 41,640 psi | 67% | 2589 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,218 psi | 61% | 2467 fps | 98% |
| Ramshot Magnum | <<locked>> | 88% | 35,882 psi | 58% | 2451 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 45% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,748 psi | 80% | 2605 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,688 psi | 75% | 2651 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,537 psi | 63% | 2500 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,203 psi | 61% | 2513 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,766 psi | 56% | 2493 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 46,644 psi | 75% | 2552 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,598 psi | 68% | 2507 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 37,159 psi | 60% | 2444 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 43,453 psi | 70% | 2493 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,322 psi | 68% | 2474 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 51,300 psi | 82% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,509 psi | 65% | 2457 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,051 psi | 77% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,732 psi | 77% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,423 psi | 66% | 2421 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,811 psi | 59% | 2438 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,905 psi | 75% | 2552 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,354 psi | 74% | 2549 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,882 psi | 58% | 2431 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,302 psi | 57% | 2375 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 42,337 psi | 68% | 2526 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 52,910 psi | 85% | 2572 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,234 psi | 65% | 2408 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,467 psi | 68% | 2500 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 88% | 36,100 psi | 58% | 2388 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 52,649 psi | 84% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 43,033 psi | 69% | 2543 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 31,227 psi | 50% | 2333 fps | 98.1% |
| Vihtavuori N560 | <<locked>> | 92% | 44,280 psi | 71% | 2644 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 42,830 psi | 69% | 2608 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,842 psi | 64% | 2444 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,223 psi | 73% | 2595 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,700 psi | 40% | 2244 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,869 psi | 61% | 2431 fps | 95.3% |
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 95 powders for .300 Win. Mag. loaded with the .308 | 200gr | Peregrine VRG-3. Alliant Reloder-26 delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,861 fps. ADI AR 2217 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, 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-23 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. Norma MRP, Alliant Reloder-26, Ramshot Grand rank at the top here: for .300 Win. Mag. with the .308 | 200gr | Peregrine VRG-3 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Norma 217 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.