Load Specifications
Load data in caliber .300 WSM with .308 | 220gr | Nosler Ballistic Tip Hunting bullet and 97 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.
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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% | 56,159 psi | 88% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,592 psi | 86% | 2470 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 2559 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 56,478 psi | 89% | 2487 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,305 psi | 90% | 2598 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,577 psi | 84% | 2644 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 86% | 56,275 psi | 88% | 2520 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,157 psi | 85% | 2592 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 2641 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 35,636 psi | 56% | 2343 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,608 psi | 87% | 2631 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,145 psi | 90% | 2536 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,319 psi | 90% | 2559 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,404 psi | 85% | 2598 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,288 psi | 87% | 2618 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,087 psi | 89% | 2631 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2638 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,430 psi | 81% | 2569 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,628 psi | 70% | 2516 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,969 psi | 86% | 2700 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 2572 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 54,491 psi | 85% | 2510 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2638 fps | 99.2% |
| Bofors RP7 | <<locked>> | 90% | 57,435 psi | 90% | 2552 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,868 psi | 86% | 2530 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,753 psi | 89% | 2615 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 92% | 57,203 psi | 90% | 2585 fps | 99.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 51,184 psi | 80% | 2526 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,534 psi | 85% | 2575 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,592 psi | 86% | 2526 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,449 psi | 88% | 2559 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,772 psi | 69% | 2552 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 90% | 55,550 psi | 87% | 2635 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 57% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,869 psi | 88% | 2507 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,419 psi | 87% | 2474 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,288 psi | 87% | 2493 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,406 psi | 90% | 2526 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 54,636 psi | 86% | 2533 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,506 psi | 87% | 2526 fps | 99.8% |
| IMR 4831 | <<locked>> | 96% | 54,781 psi | 86% | 2552 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,405 psi | 87% | 2539 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,246 psi | 90% | 2579 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2680 fps | 98.7% |
| Lovex S060 | <<locked>> | 82% | 57,334 psi | 90% | 2484 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,043 psi | 88% | 2493 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,651 psi | 87% | 2523 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 56,782 psi | 89% | 2562 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,730 psi | 72% | 2431 fps | 99.5% |
| Norma 201 | <<locked>> | 82% | 57,450 psi | 90% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,594 psi | 89% | 2546 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,347 psi | 87% | 2585 fps | 99% |
| Norma MRP | <<locked>> | 98% | 53,969 psi | 85% | 2664 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 55,637 psi | 87% | 2579 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,609 psi | 90% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,043 psi | 89% | 2690 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 92% | 54,317 psi | 85% | 2585 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,461 psi | 84% | 2612 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 58% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,810 psi | 86% | 2520 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,839 psi | 86% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,898 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,245 psi | 87% | 2648 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,468 psi | 68% | 2546 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 54,563 psi | 86% | 2457 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,650 psi | 86% | 2507 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,985 psi | 88% | 2566 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 98% | 56,289 psi | 88% | 2618 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 90% | 57,435 psi | 90% | 2552 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,651 psi | 87% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,043 psi | 88% | 2493 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,782 psi | 89% | 2562 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,246 psi | 88% | 2566 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,217 psi | 90% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,695 psi | 87% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,158 psi | 86% | 2480 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,811 psi | 87% | 2615 fps | 99.3% |
| Somchem S355 | <<locked>> | 86% | 54,534 psi | 85% | 2503 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,740 psi | 90% | 2562 fps | 98% |
| Somchem S365 | <<locked>> | 94% | 55,100 psi | 86% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,116 psi | 90% | 2598 fps | 99.7% |
| Unknown powder | <<locked>> | 90% | 56,304 psi | 88% | 2585 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 54,868 psi | 86% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,085 psi | 86% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,505 psi | 85% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,159 psi | 88% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,840 psi | 89% | 2556 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2503 fps | 99% |
| Vihtavuori N540 | <<locked>> | 84% | 57,493 psi | 90% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,043 psi | 89% | 2598 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 2635 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 2661 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 46,296 psi | 73% | 2526 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,261 psi | 90% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,753 psi | 89% | 2615 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,441 psi | 73% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,129 psi | 86% | 2566 fps | 99.1% |
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% | 52,489 psi | 82% | 2392 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,063 psi | 71% | 2329 fps | 98.2% |
| Accurate 3100 | <<locked>> | 82% | 30,008 psi | 47% | 2129 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 49,792 psi | 78% | 2402 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,072 psi | 60% | 2306 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 98% | 50,009 psi | 78% | 2589 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,021 psi | 74% | 2388 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 36,985 psi | 58% | 2293 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 42,641 psi | 67% | 2431 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 33,417 psi | 52% | 2290 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,924 psi | 81% | 2582 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,485 psi | 74% | 2408 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,589 psi | 79% | 2467 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,043 psi | 58% | 2313 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,047 psi | 66% | 2421 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 36,608 psi | 57% | 2287 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 36,622 psi | 57% | 2333 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,195 psi | 43% | 2106 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 28,921 psi | 45% | 2165 fps | 95.5% |
| Alliant Reloder-26 | 53.9 gr | 80% | 28,964 psi | 45% | 2211 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 36,332 psi | 57% | 2323 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 47,906 psi | 75% | 2421 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 36,622 psi | 57% | 2333 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,061 psi | 66% | 2313 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,095 psi | 75% | 2431 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,366 psi | 68% | 2411 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 39,436 psi | 62% | 2297 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 96% | 45,165 psi | 71% | 2431 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 44,715 psi | 70% | 2421 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,664 psi | 54% | 2218 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,472 psi | 78% | 2467 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 36,172 psi | 57% | 2385 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 38,870 psi | 61% | 2362 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 43% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,487 psi | 78% | 2421 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,272 psi | 82% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,296 psi | 73% | 2365 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,237 psi | 71% | 2343 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 37,782 psi | 59% | 2254 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,395 psi | 68% | 2339 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 33,315 psi | 52% | 2195 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 51,909 psi | 81% | 2490 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 44,686 psi | 70% | 2385 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 43,511 psi | 68% | 2461 fps | 95.9% |
| Lovex S060 | <<locked>> | 80% | 54,056 psi | 85% | 2441 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,719 psi | 78% | 2408 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,930 psi | 64% | 2297 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 39,305 psi | 62% | 2283 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 29,370 psi | 46% | 2113 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 53,867 psi | 84% | 2457 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,951 psi | 78% | 2454 fps | 100% |
| Norma 204 | <<locked>> | 80% | 37,173 psi | 58% | 2280 fps | 95.1% |
| Norma MRP | <<locked>> | 84% | 33,446 psi | 52% | 2287 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,927 psi | 59% | 2300 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,343 psi | 79% | 2480 fps | 100% |
| Ramshot Grand | 60.7 gr | 90% | 42,554 psi | 67% | 2454 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 36,709 psi | 58% | 2293 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 88% | 34,301 psi | 54% | 2274 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 44% | 1407 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,225 psi | 76% | 2421 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,643 psi | 70% | 2464 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,753 psi | 59% | 2323 fps | 99.2% |
| ReloadSwiss RS 70 | 53.4 gr | 80% | 36,622 psi | 57% | 2333 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 33,054 psi | 52% | 2310 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,387 psi | 81% | 2415 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,121 psi | 71% | 2375 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 40,799 psi | 64% | 2323 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 35,621 psi | 56% | 2270 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,061 psi | 66% | 2313 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,930 psi | 64% | 2297 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 49,719 psi | 78% | 2408 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,305 psi | 62% | 2283 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,238 psi | 72% | 2425 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,664 psi | 84% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,311 psi | 73% | 2280 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,030 psi | 63% | 2247 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 37,811 psi | 59% | 2316 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 45,281 psi | 71% | 2369 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 44,309 psi | 69% | 2362 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,432 psi | 54% | 2267 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 33,953 psi | 53% | 2208 fps | 95.4% |
| Unknown powder | <<locked>> | 80% | 40,712 psi | 64% | 2346 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,880 psi | 81% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,779 psi | 81% | 2379 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,329 psi | 80% | 2388 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,972 psi | 61% | 2238 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,944 psi | 64% | 2323 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 88% | 34,519 psi | 54% | 2218 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 50,821 psi | 80% | 2411 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,350 psi | 65% | 2362 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,182 psi | 47% | 2175 fps | 98.1% |
| Vihtavuori N560 | <<locked>> | 92% | 42,018 psi | 66% | 2451 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 43,279 psi | 68% | 2470 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,145 psi | 60% | 2267 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,366 psi | 68% | 2411 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,076 psi | 38% | 2096 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,201 psi | 57% | 2257 fps | 95% |
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 97 powders for .300 WSM loaded with the .308 | 220gr | Nosler Ballistic Tip Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,700 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 1:11.5 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, Ramshot Grand rank at the top here: for .300 WSM with the .308 | 220gr | Nosler Ballistic Tip Hunting 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.