Load Specifications
Load data in caliber .300 WSM with .308 | 201gr | RWS Kegelspitz bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 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% | 54,607 psi | 86% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,927 psi | 89% | 2628 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,127 psi | 83% | 2664 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 55,042 psi | 86% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,666 psi | 87% | 2710 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,435 psi | 90% | 2674 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,187 psi | 86% | 2635 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,304 psi | 88% | 2749 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 2746 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,186 psi | 85% | 2749 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,883 psi | 88% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,072 psi | 88% | 2677 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,362 psi | 88% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,551 psi | 90% | 2782 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,680 psi | 87% | 2740 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2743 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 2680 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2615 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2864 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,421 psi | 90% | 2697 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,443 psi | 76% | 2674 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 56,637 psi | 89% | 2671 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2743 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 55,883 psi | 88% | 2657 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 56,985 psi | 89% | 2687 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,434 psi | 87% | 2726 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 92% | 55,709 psi | 87% | 2694 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 49,980 psi | 78% | 2628 fps | 95.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,637 psi | 89% | 2730 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,449 psi | 88% | 2684 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,027 psi | 86% | 2674 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,612 psi | 67% | 2644 fps | 97% |
| Hodgdon Superformance | <<locked>> | 90% | 54,099 psi | 85% | 2743 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,679 psi | 86% | 2625 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,537 psi | 90% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,319 psi | 90% | 2654 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,275 psi | 88% | 2641 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 56,797 psi | 89% | 2694 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,580 psi | 90% | 2684 fps | 99.7% |
| IMR 4831 | <<locked>> | 98% | 56,826 psi | 89% | 2710 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,522 psi | 90% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,738 psi | 87% | 2680 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2785 fps | 97.8% |
| Lovex S060 | <<locked>> | 82% | 56,072 psi | 88% | 2598 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,810 psi | 86% | 2612 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,551 psi | 90% | 2680 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 55,506 psi | 87% | 2674 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,135 psi | 69% | 2523 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 56,086 psi | 88% | 2618 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,782 psi | 89% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,361 psi | 87% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,925 psi | 85% | 2690 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2825 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 54,244 psi | 85% | 2694 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,101 psi | 88% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,347 psi | 87% | 2789 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 94% | 56,579 psi | 89% | 2746 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,822 psi | 81% | 2710 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 58% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,014 psi | 89% | 2677 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,087 psi | 89% | 2740 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,319 psi | 90% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,172 psi | 86% | 2730 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,609 psi | 90% | 2812 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,293 psi | 66% | 2635 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,710 psi | 89% | 2618 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,768 psi | 89% | 2667 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,636 psi | 86% | 2671 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 98% | 54,868 psi | 86% | 2726 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 90% | 55,883 psi | 88% | 2657 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,551 psi | 90% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 54,810 psi | 86% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,506 psi | 87% | 2674 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,810 psi | 86% | 2677 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,666 psi | 87% | 2648 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,058 psi | 89% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,259 psi | 85% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,508 psi | 90% | 2638 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,375 psi | 85% | 2720 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 56,536 psi | 89% | 2546 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,739 psi | 89% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,318 psi | 88% | 2667 fps | 97.1% |
| Somchem S365 | <<locked>> | 96% | 56,971 psi | 89% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,564 psi | 87% | 2703 fps | 99.3% |
| Unknown powder | <<locked>> | 90% | 54,766 psi | 86% | 2697 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 56,971 psi | 89% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,174 psi | 90% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,550 psi | 89% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,679 psi | 86% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,376 psi | 87% | 2671 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2602 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 56,275 psi | 88% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,608 psi | 87% | 2713 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2749 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 2762 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,043 psi | 88% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,434 psi | 87% | 2726 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,121 psi | 71% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,725 psi | 90% | 2726 fps | 98.9% |
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 2495 | <<locked>> | 80% | 51,213 psi | 80% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,135 psi | 69% | 2431 fps | 97.3% |
| Accurate 3100 | <<locked>> | 84% | 31,009 psi | 49% | 2257 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,515 psi | 76% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,014 psi | 58% | 2402 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 80% | 54,027 psi | 85% | 2628 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,803 psi | 72% | 2493 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,857 psi | 64% | 2484 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 47,384 psi | 74% | 2635 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,517 psi | 79% | 2694 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,311 psi | 73% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,516 psi | 78% | 2582 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,100 psi | 57% | 2408 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,669 psi | 64% | 2523 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,451 psi | 63% | 2480 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,567 psi | 64% | 2526 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,411 psi | 41% | 2185 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,763 psi | 50% | 2346 fps | 95.9% |
| Alliant Reloder-26 | 57.9 gr | 82% | 30,008 psi | 47% | 2343 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,780 psi | 84% | 2648 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 40,016 psi | 63% | 2513 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,485 psi | 73% | 2526 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,567 psi | 64% | 2526 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,089 psi | 64% | 2411 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,934 psi | 74% | 2536 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,192 psi | 66% | 2507 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 38,450 psi | 60% | 2392 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 98% | 46,818 psi | 73% | 2575 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,705 psi | 78% | 2625 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,721 psi | 53% | 2310 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,225 psi | 76% | 2575 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,856 psi | 62% | 2579 fps | 95.9% |
| Hodgdon Superformance | 58.3 gr | 80% | 37,797 psi | 59% | 2451 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,457 psi | 76% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,720 psi | 79% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,194 psi | 71% | 2474 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,193 psi | 69% | 2444 fps | 98% |
| IMR 4350 | <<locked>> | 80% | 36,796 psi | 58% | 2346 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,380 psi | 66% | 2438 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 32,242 psi | 51% | 2280 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 50,792 psi | 80% | 2605 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,325 psi | 73% | 2530 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 45,179 psi | 71% | 2608 fps | 95.4% |
| Lovex S060 | <<locked>> | 80% | 52,736 psi | 83% | 2552 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,370 psi | 76% | 2516 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,987 psi | 63% | 2392 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 38,261 psi | 60% | 2375 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 32,140 psi | 50% | 2283 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 52,692 psi | 83% | 2572 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,359 psi | 84% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,878 psi | 77% | 2569 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,292 psi | 65% | 2474 fps | 95.5% |
| Norma MRP | <<locked>> | 86% | 34,809 psi | 55% | 2431 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 36,811 psi | 58% | 2395 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,023 psi | 77% | 2589 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 44,483 psi | 70% | 2605 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,650 psi | 56% | 2382 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 92% | 38,305 psi | 60% | 2467 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,833 psi | 44% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,021 psi | 74% | 2523 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,490 psi | 84% | 2690 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,221 psi | 68% | 2569 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,651 psi | 57% | 2415 fps | 98.4% |
| ReloadSwiss RS 70 | 56 gr | 80% | 35,636 psi | 56% | 2421 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,883 psi | 58% | 2510 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,343 psi | 79% | 2530 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,903 psi | 69% | 2477 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,179 psi | 71% | 2516 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 39,523 psi | 62% | 2464 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,089 psi | 64% | 2411 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,987 psi | 63% | 2392 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 48,370 psi | 76% | 2516 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,261 psi | 60% | 2375 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,962 psi | 70% | 2530 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,373 psi | 82% | 2602 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,505 psi | 84% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,252 psi | 71% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,189 psi | 61% | 2343 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,160 psi | 61% | 2461 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,229 psi | 83% | 2503 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,193 psi | 69% | 2477 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,385 psi | 77% | 2562 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 33,286 psi | 52% | 2356 fps | 99.9% |
| Somchem S385 | <<locked>> | 86% | 37,608 psi | 59% | 2398 fps | 95.8% |
| Unknown powder | <<locked>> | 80% | 39,726 psi | 62% | 2444 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,676 psi | 79% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,502 psi | 79% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,893 psi | 78% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,971 psi | 60% | 2336 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,798 psi | 62% | 2421 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 92% | 38,203 psi | 60% | 2402 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,501 psi | 78% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,234 psi | 63% | 2461 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 28,979 psi | 45% | 2254 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 96% | 46,644 psi | 73% | 2654 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,318 psi | 58% | 2365 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,192 psi | 66% | 2507 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,366 psi | 37% | 2156 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,538 psi | 64% | 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 Kegelspitz. Alliant Reloder-26 delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,864 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 47–90 %, leaving at least 10 % headroom. The 201.0 gr projectile in 0.308" calls for a 1:14.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 201gr | RWS Kegelspitz they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, 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.