Load Specifications
Load data in caliber .300 WSM with .308 | 201gr | RWS UNI Classic bullet and 100 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 2495 | <<locked>> | 82% | 54,752 psi | 86% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,087 psi | 89% | 2631 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,214 psi | 83% | 2667 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 55,216 psi | 87% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,535 psi | 87% | 2710 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,551 psi | 90% | 2677 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,085 psi | 86% | 2638 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,420 psi | 88% | 2753 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2749 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,331 psi | 85% | 2756 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,985 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,217 psi | 88% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,202 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,725 psi | 90% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,782 psi | 87% | 2743 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,823 psi | 83% | 2746 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 2684 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,482 psi | 68% | 2615 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2871 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,522 psi | 90% | 2700 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2677 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 56,797 psi | 89% | 2674 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,823 psi | 83% | 2746 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 56,014 psi | 88% | 2664 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 57,101 psi | 89% | 2690 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,303 psi | 87% | 2726 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 92% | 55,840 psi | 88% | 2697 fps | 99% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2628 fps | 95.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,753 psi | 89% | 2733 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,608 psi | 89% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,129 psi | 86% | 2680 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2648 fps | 97% |
| Hodgdon Superformance | <<locked>> | 90% | 54,244 psi | 85% | 2749 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 57% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,810 psi | 86% | 2628 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,725 psi | 90% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,479 psi | 90% | 2657 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,130 psi | 88% | 2641 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 56,884 psi | 89% | 2697 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,696 psi | 90% | 2687 fps | 99.7% |
| IMR 4831 | <<locked>> | 98% | 56,681 psi | 89% | 2713 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,711 psi | 90% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,869 psi | 88% | 2684 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2789 fps | 97.9% |
| Lovex S060 | <<locked>> | 82% | 56,246 psi | 88% | 2605 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,955 psi | 86% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,711 psi | 90% | 2684 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 55,666 psi | 87% | 2680 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,266 psi | 69% | 2530 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 56,246 psi | 88% | 2621 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,942 psi | 89% | 2618 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,506 psi | 87% | 2667 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,085 psi | 85% | 2697 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 56,289 psi | 88% | 2828 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 54,346 psi | 85% | 2697 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,231 psi | 88% | 2694 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,492 psi | 87% | 2795 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 94% | 56,695 psi | 89% | 2753 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,938 psi | 81% | 2717 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,116 psi | 90% | 2680 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,217 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,188 psi | 90% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,303 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,882 psi | 84% | 2762 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,380 psi | 66% | 2641 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 56,869 psi | 89% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,913 psi | 89% | 2671 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,781 psi | 86% | 2677 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 98% | 55,013 psi | 86% | 2730 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 90% | 56,014 psi | 88% | 2664 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,711 psi | 90% | 2684 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 54,955 psi | 86% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,666 psi | 87% | 2680 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,694 psi | 86% | 2677 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,825 psi | 87% | 2651 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,913 psi | 89% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,433 psi | 85% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,653 psi | 90% | 2644 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,534 psi | 85% | 2726 fps | 98.8% |
| Somchem S335 | <<locked>> | 82% | 56,695 psi | 89% | 2549 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,608 psi | 89% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,449 psi | 88% | 2671 fps | 97.2% |
| Somchem S365 | <<locked>> | 96% | 57,072 psi | 89% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,680 psi | 87% | 2707 fps | 99.3% |
| Unknown powder | <<locked>> | 90% | 54,926 psi | 86% | 2700 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 57,101 psi | 89% | 2530 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,319 psi | 90% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,666 psi | 89% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,824 psi | 86% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,245 psi | 87% | 2671 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2605 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 56,376 psi | 88% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,738 psi | 87% | 2717 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 2753 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2769 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,898 psi | 88% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,303 psi | 87% | 2726 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,976 psi | 70% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,809 psi | 84% | 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 2495 | <<locked>> | 80% | 51,358 psi | 80% | 2510 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,034 psi | 69% | 2431 fps | 97.3% |
| Accurate 3100 | <<locked>> | 84% | 31,082 psi | 49% | 2260 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 48,689 psi | 76% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,941 psi | 58% | 2402 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 80% | 53,867 psi | 84% | 2628 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,934 psi | 72% | 2497 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,944 psi | 64% | 2490 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 44,309 psi | 69% | 2579 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,647 psi | 79% | 2700 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,427 psi | 73% | 2520 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,414 psi | 77% | 2579 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,201 psi | 57% | 2411 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,799 psi | 64% | 2526 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,538 psi | 64% | 2484 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,640 psi | 64% | 2533 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,513 psi | 42% | 2188 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,865 psi | 50% | 2352 fps | 96% |
| Alliant Reloder-26 | 56.6 gr | 80% | 28,094 psi | 44% | 2287 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,635 psi | 84% | 2648 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 40,103 psi | 63% | 2520 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 46,615 psi | 73% | 2530 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,640 psi | 64% | 2533 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,220 psi | 65% | 2415 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 47,050 psi | 74% | 2543 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,308 psi | 66% | 2513 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 38,551 psi | 60% | 2395 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 46,949 psi | 74% | 2579 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,470 psi | 73% | 2572 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 53% | 2310 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,370 psi | 76% | 2582 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,914 psi | 63% | 2585 fps | 96% |
| Hodgdon Superformance | 58.4 gr | 80% | 37,884 psi | 59% | 2457 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 43% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,370 psi | 76% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,894 psi | 80% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,107 psi | 71% | 2474 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,309 psi | 69% | 2451 fps | 98.1% |
| IMR 4350 | <<locked>> | 80% | 36,724 psi | 58% | 2346 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,511 psi | 67% | 2441 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 32,372 psi | 51% | 2287 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 50,691 psi | 79% | 2605 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,441 psi | 73% | 2536 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 45,310 psi | 71% | 2612 fps | 95.4% |
| Lovex S060 | <<locked>> | 80% | 52,895 psi | 83% | 2556 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,515 psi | 76% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,074 psi | 63% | 2398 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 38,363 psi | 60% | 2382 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 32,256 psi | 51% | 2287 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 52,823 psi | 83% | 2575 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,490 psi | 84% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,776 psi | 76% | 2569 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,379 psi | 65% | 2480 fps | 95.6% |
| Norma MRP | <<locked>> | 86% | 34,766 psi | 54% | 2431 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 36,912 psi | 58% | 2398 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,197 psi | 77% | 2592 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 44,353 psi | 70% | 2608 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,737 psi | 56% | 2388 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 92% | 38,421 psi | 60% | 2474 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 44% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,123 psi | 74% | 2530 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,635 psi | 84% | 2694 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,337 psi | 68% | 2572 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,738 psi | 58% | 2421 fps | 98.4% |
| ReloadSwiss RS 70 | 56.1 gr | 80% | 35,723 psi | 56% | 2425 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,985 psi | 58% | 2513 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 50,241 psi | 79% | 2530 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,063 psi | 69% | 2484 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,295 psi | 71% | 2523 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 39,639 psi | 62% | 2467 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,220 psi | 65% | 2415 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,074 psi | 63% | 2398 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 48,515 psi | 76% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,363 psi | 60% | 2382 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,107 psi | 71% | 2533 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,518 psi | 82% | 2605 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,635 psi | 84% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,382 psi | 71% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,305 psi | 62% | 2346 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,262 psi | 62% | 2464 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 53,374 psi | 84% | 2510 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,309 psi | 69% | 2480 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,487 psi | 78% | 2566 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 33,214 psi | 52% | 2356 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,360 psi | 55% | 2352 fps | 95% |
| Unknown powder | <<locked>> | 80% | 39,639 psi | 62% | 2448 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,836 psi | 80% | 2451 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,662 psi | 79% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,038 psi | 78% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,087 psi | 60% | 2343 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,711 psi | 62% | 2421 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 92% | 38,305 psi | 60% | 2408 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,647 psi | 78% | 2526 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,364 psi | 63% | 2464 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 29,080 psi | 46% | 2257 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 96% | 46,514 psi | 73% | 2654 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,231 psi | 58% | 2365 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,308 psi | 66% | 2513 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,424 psi | 37% | 2162 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,422 psi | 63% | 2454 fps | 95.5% |
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 108 powders for .300 WSM loaded with the .308 | 201gr | RWS UNI Classic. Alliant Reloder-26 delivers the highest muzzle velocity at 2,871 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,871 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 201.0 gr projectile in 0.308" calls for a 1:12.5 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 | 201gr | RWS UNI Classic they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.