Load Specifications
Bullet:.308 | 220gr | Lapua ScenarL
Bullet Manufacturer:Lapua
Bullet Weight:220 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:11.0
Load data in caliber .300 WSM with .308 | 220gr | Lapua ScenarL bullet and 99 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 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 2495 | <<locked>> | 82% | 55,651 psi | 87% | 2428 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,273 psi | 85% | 2464 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2549 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 56,028 psi | 88% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,579 psi | 89% | 2589 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 52,982 psi | 83% | 2631 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 86% | 55,869 psi | 88% | 2510 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,363 psi | 90% | 2635 fps | 99.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2635 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 35,433 psi | 56% | 2336 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,158 psi | 86% | 2625 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,724 psi | 89% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,174 psi | 90% | 2556 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,450 psi | 90% | 2638 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,868 psi | 86% | 2608 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,768 psi | 89% | 2625 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2631 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 2562 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,396 psi | 70% | 2510 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,331 psi | 85% | 2690 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2562 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 54,070 psi | 85% | 2503 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 2631 fps | 99.2% |
| Bofors RP7 | <<locked>> | 90% | 57,072 psi | 89% | 2546 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,462 psi | 85% | 2520 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,420 psi | 88% | 2608 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 92% | 56,840 psi | 89% | 2579 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2520 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,954 psi | 85% | 2566 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,740 psi | 90% | 2562 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,057 psi | 88% | 2552 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2546 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 90% | 55,172 psi | 86% | 2628 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,709 psi | 87% | 2503 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,158 psi | 86% | 2470 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,853 psi | 86% | 2487 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,000 psi | 89% | 2516 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 54,317 psi | 85% | 2526 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,143 psi | 86% | 2520 fps | 99.7% |
| IMR 4831 | <<locked>> | 96% | 54,418 psi | 85% | 2546 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,940 psi | 86% | 2530 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,681 psi | 89% | 2569 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2667 fps | 98.6% |
| Lovex S060 | <<locked>> | 82% | 56,898 psi | 89% | 2477 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,637 psi | 87% | 2487 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,288 psi | 87% | 2516 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 56,434 psi | 88% | 2556 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2421 fps | 99.4% |
| Norma 201 | <<locked>> | 82% | 57,000 psi | 89% | 2493 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,463 psi | 88% | 2543 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,013 psi | 86% | 2579 fps | 99% |
| Norma MRPᴾ | <<locked>> | 100% | 57,232 psi | 90% | 2707 fps | 100% |
| Norma URP | <<locked>> | 92% | 55,259 psi | 87% | 2572 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,217 psi | 90% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,420 psi | 88% | 2677 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 94% | 57,624 psi | 90% | 2628 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2602 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 58% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,447 psi | 85% | 2510 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,418 psi | 85% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,507 psi | 89% | 2612 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,897 psi | 86% | 2641 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,265 psi | 68% | 2539 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 54,389 psi | 85% | 2454 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,201 psi | 85% | 2500 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,637 psi | 87% | 2559 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 98% | 55,970 psi | 88% | 2612 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 90% | 57,072 psi | 89% | 2546 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,288 psi | 87% | 2516 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,637 psi | 87% | 2487 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,434 psi | 88% | 2556 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,854 psi | 88% | 2556 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,797 psi | 89% | 2526 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,653 psi | 90% | 2421 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,245 psi | 87% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,781 psi | 86% | 2474 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,477 psi | 87% | 2608 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 57,435 psi | 90% | 2425 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,143 psi | 85% | 2493 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,203 psi | 90% | 2552 fps | 97.9% |
| Somchem S365 | <<locked>> | 94% | 54,708 psi | 86% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,536 psi | 89% | 2589 fps | 99.7% |
| Unknown powder | <<locked>> | 90% | 55,927 psi | 88% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 54,665 psi | 86% | 2365 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 54,621 psi | 86% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,435 psi | 90% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,753 psi | 87% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,478 psi | 89% | 2549 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,343 psi | 79% | 2490 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 57,101 psi | 89% | 2490 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,695 psi | 89% | 2592 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2628 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 2654 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2513 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,985 psi | 89% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,420 psi | 88% | 2608 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,905 psi | 72% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,882 psi | 86% | 2562 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 2495 | <<locked>> | 80% | 52,301 psi | 82% | 2388 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,730 psi | 70% | 2320 fps | 98.1% |
| Accurate 3100 | <<locked>> | 82% | 29,689 psi | 47% | 2119 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 49,545 psi | 78% | 2395 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,884 psi | 59% | 2300 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 98% | 49,501 psi | 78% | 2579 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 46,615 psi | 73% | 2379 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,030 psi | 61% | 2333 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 42,380 psi | 66% | 2425 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 33,228 psi | 52% | 2280 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,474 psi | 81% | 2575 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,297 psi | 74% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,415 psi | 79% | 2464 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,898 psi | 58% | 2310 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,640 psi | 65% | 2415 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 36,463 psi | 57% | 2280 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 36,318 psi | 57% | 2323 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,064 psi | 42% | 2103 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 28,689 psi | 45% | 2159 fps | 95.3% |
| Alliant Reloder-26 | 53.5 gr | 80% | 28,689 psi | 45% | 2201 fps | 96.5% |
| Bofors RP15 | <<locked>> | 92% | 38,305 psi | 60% | 2365 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,514 psi | 74% | 2411 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 36,318 psi | 57% | 2323 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,916 psi | 66% | 2310 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,950 psi | 75% | 2428 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,004 psi | 67% | 2402 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 39,262 psi | 62% | 2290 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 96% | 44,686 psi | 70% | 2418 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 44,425 psi | 70% | 2415 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,301 psi | 54% | 2208 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,356 psi | 77% | 2464 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 35,940 psi | 56% | 2375 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 38,580 psi | 60% | 2356 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 43% | 1371 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,095 psi | 77% | 2415 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,764 psi | 81% | 2428 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,876 psi | 72% | 2359 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,063 psi | 71% | 2339 fps | 98.7% |
| IMR 4350 | <<locked>> | 80% | 37,463 psi | 59% | 2247 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,236 psi | 68% | 2333 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 33,141 psi | 52% | 2192 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 51,721 psi | 81% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 44,396 psi | 70% | 2379 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 43,236 psi | 68% | 2454 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 53,621 psi | 84% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,284 psi | 77% | 2402 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,770 psi | 64% | 2290 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 38,914 psi | 61% | 2274 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 29,037 psi | 46% | 2103 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 53,679 psi | 84% | 2454 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,777 psi | 78% | 2451 fps | 100% |
| Norma 204 | <<locked>> | 82% | 39,421 psi | 62% | 2323 fps | 95.8% |
| Norma MRP | <<locked>> | 84% | 33,156 psi | 52% | 2280 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 37,521 psi | 59% | 2293 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 49,937 psi | 78% | 2470 fps | 100% |
| Ramshot Grand | 60.3 gr | 90% | 42,279 psi | 66% | 2448 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,390 psi | 57% | 2287 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 36,506 psi | 57% | 2320 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 44% | 1404 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,834 psi | 75% | 2415 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,222 psi | 69% | 2457 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,565 psi | 59% | 2320 fps | 99.1% |
| ReloadSwiss RS 70 | 53 gr | 80% | 36,303 psi | 57% | 2326 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 32,866 psi | 52% | 2303 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,198 psi | 80% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,730 psi | 70% | 2365 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 40,509 psi | 63% | 2313 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 35,476 psi | 56% | 2264 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,916 psi | 66% | 2310 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,770 psi | 64% | 2290 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 49,284 psi | 77% | 2402 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,914 psi | 61% | 2274 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,847 psi | 72% | 2418 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,287 psi | 84% | 2480 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,476 psi | 85% | 2385 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,108 psi | 72% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,900 psi | 63% | 2244 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 37,449 psi | 59% | 2310 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 54,172 psi | 85% | 2385 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,107 psi | 71% | 2365 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 44,063 psi | 69% | 2356 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,055 psi | 53% | 2257 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 33,808 psi | 53% | 2205 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 40,553 psi | 64% | 2343 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,706 psi | 81% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,590 psi | 81% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,865 psi | 80% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,798 psi | 61% | 2234 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,553 psi | 64% | 2316 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 88% | 34,432 psi | 54% | 2211 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,430 psi | 79% | 2405 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,191 psi | 65% | 2359 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,834 psi | 47% | 2169 fps | 98% |
| Vihtavuori N560 | <<locked>> | 94% | 44,614 psi | 70% | 2497 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 42,728 psi | 67% | 2461 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,072 psi | 60% | 2267 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,004 psi | 67% | 2402 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,859 psi | 37% | 2087 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,479 psi | 60% | 2300 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 99 powders for .300 WSM loaded with the .308 | 220gr | Lapua ScenarL. Norma MRP delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,707 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:11.0 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, Ramshot Grand rank at the top here: for .300 WSM with the .308 | 220gr | Lapua ScenarL 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.