Load Specifications
Load data in caliber .300 WSM with .308 | 200gr | Swift A-Frame bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
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 2700 | <<locked>> | 88% | 56,231 psi | 88% | 2618 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2680 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 57,159 psi | 90% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,348 psi | 90% | 2723 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,202 psi | 88% | 2641 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,377 psi | 90% | 2756 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2756 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,332 psi | 87% | 2759 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,203 psi | 90% | 2664 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,435 psi | 90% | 2684 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,319 psi | 90% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,013 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,826 psi | 89% | 2749 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 2756 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2690 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,788 psi | 70% | 2628 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,592 psi | 86% | 2822 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,864 psi | 78% | 2687 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 54,882 psi | 86% | 2638 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 2756 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 57,319 psi | 90% | 2671 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 54,984 psi | 86% | 2651 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,681 psi | 89% | 2736 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 92% | 54,853 psi | 86% | 2680 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2635 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,259 psi | 85% | 2687 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,638 psi | 90% | 2690 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,305 psi | 90% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,626 psi | 65% | 2621 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 90% | 55,056 psi | 86% | 2749 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 57% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,232 psi | 90% | 2661 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,376 psi | 87% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,216 psi | 87% | 2615 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,334 psi | 90% | 2644 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 54,708 psi | 86% | 2651 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,811 psi | 89% | 2674 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 54,752 psi | 86% | 2674 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,361 psi | 87% | 2661 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,853 psi | 86% | 2667 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2789 fps | 97.8% |
| Lovex S060 | <<locked>> | 82% | 57,261 psi | 90% | 2608 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,217 psi | 88% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,709 psi | 87% | 2644 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 56,869 psi | 89% | 2684 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,050 psi | 72% | 2546 fps | 99% |
| Norma 201 | <<locked>> | 82% | 57,522 psi | 90% | 2625 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,710 psi | 89% | 2671 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,085 psi | 86% | 2700 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 57,348 psi | 90% | 2835 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 55,477 psi | 87% | 2700 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,159 psi | 90% | 2694 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,507 psi | 89% | 2799 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 92% | 54,099 psi | 85% | 2703 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2720 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,723 psi | 86% | 2635 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,447 psi | 85% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,652 psi | 89% | 2743 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,984 psi | 86% | 2769 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,758 psi | 69% | 2654 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 55,042 psi | 86% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,955 psi | 86% | 2631 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,753 psi | 87% | 2677 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 98% | 56,202 psi | 88% | 2736 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 90% | 57,319 psi | 90% | 2671 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,709 psi | 87% | 2644 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,217 psi | 88% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,433 psi | 85% | 2657 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,869 psi | 88% | 2684 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,913 psi | 89% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,622 psi | 87% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,347 psi | 87% | 2598 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2759 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 54,853 psi | 86% | 2628 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,464 psi | 90% | 2674 fps | 97.1% |
| Somchem S365 | <<locked>> | 94% | 54,650 psi | 86% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,116 psi | 90% | 2717 fps | 99.4% |
| Unknown powder | <<locked>> | 90% | 56,130 psi | 88% | 2707 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 54,911 psi | 86% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,072 psi | 88% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,578 psi | 86% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,130 psi | 88% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,565 psi | 89% | 2677 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,807 psi | 80% | 2615 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 57,522 psi | 90% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,913 psi | 89% | 2720 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 2762 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 2776 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,956 psi | 89% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,681 psi | 89% | 2736 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,528 psi | 73% | 2756 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,795 psi | 86% | 2677 fps | 98.4% |
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% | 43,395 psi | 68% | 2415 fps | 97% |
| Accurate 3100 | <<locked>> | 82% | 31,024 psi | 49% | 2241 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,865 psi | 80% | 2533 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,856 psi | 61% | 2425 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 47,065 psi | 74% | 2503 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 42,163 psi | 66% | 2500 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 45,426 psi | 71% | 2589 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,692 psi | 81% | 2703 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,834 psi | 75% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,821 psi | 80% | 2589 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,492 psi | 59% | 2428 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,047 psi | 66% | 2536 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,349 psi | 62% | 2444 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,436 psi | 62% | 2493 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,079 psi | 44% | 2218 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,415 psi | 49% | 2323 fps | 95.5% |
| Alliant Reloder-26 | 55.7 gr | 80% | 29,762 psi | 47% | 2320 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 41,394 psi | 65% | 2533 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,472 psi | 76% | 2543 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,436 psi | 62% | 2493 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,453 psi | 67% | 2425 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 48,428 psi | 76% | 2549 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,613 psi | 68% | 2523 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 82% | 40,161 psi | 63% | 2428 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 98% | 48,022 psi | 75% | 2585 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,587 psi | 75% | 2579 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,070 psi | 55% | 2329 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,169 psi | 79% | 2608 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,088 psi | 61% | 2562 fps | 95.3% |
| Hodgdon Superformance | 57.4 gr | 80% | 39,044 psi | 61% | 2467 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,558 psi | 75% | 2520 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,185 psi | 82% | 2559 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,296 psi | 73% | 2480 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,440 psi | 71% | 2454 fps | 98.1% |
| IMR 4350 | <<locked>> | 80% | 38,000 psi | 60% | 2359 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,800 psi | 66% | 2428 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 33,982 psi | 53% | 2306 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 52,127 psi | 82% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,399 psi | 76% | 2566 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 46,499 psi | 73% | 2621 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,911 psi | 84% | 2559 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,966 psi | 78% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,640 psi | 65% | 2411 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 39,769 psi | 62% | 2395 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 32,198 psi | 50% | 2270 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 54,375 psi | 85% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,212 psi | 79% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,598 psi | 67% | 2490 fps | 95.7% |
| Norma MRP | <<locked>> | 86% | 36,260 psi | 57% | 2451 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 38,218 psi | 60% | 2411 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 50,328 psi | 79% | 2598 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 45,687 psi | 72% | 2618 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,028 psi | 58% | 2402 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 39,885 psi | 63% | 2487 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,341 psi | 76% | 2536 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,570 psi | 70% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,261 psi | 60% | 2438 fps | 98.6% |
| ReloadSwiss RS 70 | 55.2 gr | 80% | 36,999 psi | 58% | 2441 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,969 psi | 56% | 2470 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,764 psi | 81% | 2539 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,600 psi | 71% | 2493 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,485 psi | 73% | 2530 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,060 psi | 64% | 2484 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,453 psi | 67% | 2425 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,640 psi | 65% | 2411 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 49,966 psi | 78% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,507 psi | 59% | 2362 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,282 psi | 73% | 2539 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,592 psi | 84% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,499 psi | 73% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,669 psi | 64% | 2359 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,843 psi | 64% | 2493 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 45,847 psi | 72% | 2490 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,543 psi | 75% | 2520 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 34,809 psi | 55% | 2379 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,927 psi | 58% | 2369 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 41,031 psi | 64% | 2461 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 80% | 51,851 psi | 81% | 2454 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,705 psi | 78% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,329 psi | 80% | 2510 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,523 psi | 62% | 2352 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,191 psi | 65% | 2434 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,537 psi | 62% | 2418 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,024 psi | 80% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,713 psi | 65% | 2477 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,922 psi | 48% | 2290 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 96% | 47,790 psi | 75% | 2667 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,479 psi | 60% | 2379 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,613 psi | 68% | 2523 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,019 psi | 39% | 2201 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,858 psi | 66% | 2467 fps | 95.7% |
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 102 powders for .300 WSM loaded with the .308 | 200gr | Swift A-Frame. Norma MRP delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,835 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Alliant Reloder-26, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 200gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, Baschieri & Pellagri 109 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.