Load Specifications
Load data in caliber .300 WSM with .308 | 220gr | Sako Hammerhead bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Ramshot Grand and Norma MRP.
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% | 57,319 psi | 90% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,782 psi | 87% | 2497 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2585 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,288 psi | 85% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,955 psi | 86% | 2575 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2677 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,435 psi | 90% | 2539 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,637 psi | 87% | 2621 fps | 99.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 2674 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,680 psi | 57% | 2375 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,188 psi | 90% | 2657 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,071 psi | 86% | 2520 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,259 psi | 87% | 2539 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,550 psi | 87% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,058 psi | 89% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,172 psi | 86% | 2615 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2667 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 2595 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,093 psi | 72% | 2549 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,159 psi | 90% | 2733 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 2602 fps | 98.9% |
| Bofors RP3 | <<locked>> | 84% | 55,753 psi | 87% | 2533 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 41,858 psi | 66% | 2477 fps | 96.4% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2667 fps | 99.5% |
| Bofors RP7 | <<locked>> | 88% | 55,143 psi | 86% | 2530 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,598 psi | 67% | 2438 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 84% | 56,043 psi | 88% | 2552 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,491 psi | 85% | 2592 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 54,926 psi | 86% | 2562 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,518 psi | 82% | 2556 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,869 psi | 88% | 2602 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,999 psi | 88% | 2549 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,711 psi | 90% | 2582 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,136 psi | 71% | 2589 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 90% | 57,290 psi | 90% | 2664 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 57% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,101 psi | 89% | 2530 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,637 psi | 89% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,521 psi | 89% | 2516 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,201 psi | 87% | 2507 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 56,173 psi | 88% | 2562 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,492 psi | 89% | 2549 fps | 99.9% |
| IMR 4831 | <<locked>> | 96% | 56,159 psi | 88% | 2579 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,710 psi | 89% | 2562 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,998 psi | 86% | 2556 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 54,621 psi | 86% | 2654 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 57,334 psi | 90% | 2516 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,710 psi | 89% | 2546 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 54,839 psi | 86% | 2546 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2454 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 54,549 psi | 85% | 2526 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,826 psi | 89% | 2615 fps | 99.3% |
| Norma MRP | <<locked>> | 98% | 55,753 psi | 87% | 2694 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,014 psi | 89% | 2605 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,143 psi | 86% | 2552 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,360 psi | 85% | 2661 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,796 psi | 87% | 2615 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,882 psi | 86% | 2641 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 59% | 1588 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,854 psi | 88% | 2539 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,391 psi | 88% | 2631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,824 psi | 86% | 2598 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,710 psi | 89% | 2674 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,889 psi | 70% | 2585 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 82% | 55,883 psi | 88% | 2480 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,869 psi | 88% | 2530 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,406 psi | 90% | 2595 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 96% | 54,418 psi | 85% | 2602 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 88% | 55,143 psi | 86% | 2530 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,710 psi | 89% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,334 psi | 90% | 2516 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,839 psi | 86% | 2546 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,377 psi | 90% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,623 psi | 89% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,333 psi | 88% | 2507 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,638 psi | 90% | 2648 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 55,724 psi | 87% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,347 psi | 87% | 2539 fps | 97.8% |
| Somchem S365 | <<locked>> | 94% | 56,623 psi | 89% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,897 psi | 86% | 2575 fps | 99.7% |
| Unknown powder | <<locked>> | 90% | 57,711 psi | 90% | 2612 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 55,970 psi | 88% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 56,260 psi | 88% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,506 psi | 87% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,261 psi | 90% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,563 psi | 86% | 2536 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,257 psi | 82% | 2530 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 55,114 psi | 86% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,824 psi | 86% | 2579 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,651 psi | 87% | 2621 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2694 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2556 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,042 psi | 86% | 2523 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,491 psi | 85% | 2592 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,327 psi | 76% | 2664 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,768 psi | 89% | 2598 fps | 99.3% |
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% | 53,925 psi | 85% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,035 psi | 72% | 2356 fps | 98.5% |
| Accurate 3100 | <<locked>> | 80% | 28,921 psi | 45% | 2106 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,155 psi | 80% | 2425 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,262 psi | 62% | 2333 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 96% | 48,037 psi | 75% | 2562 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,964 psi | 75% | 2411 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,898 psi | 59% | 2320 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 40,901 psi | 64% | 2405 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 32,372 psi | 51% | 2270 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,214 psi | 83% | 2605 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,472 psi | 76% | 2428 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,837 psi | 81% | 2493 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,956 psi | 59% | 2339 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,192 psi | 68% | 2448 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,521 psi | 59% | 2313 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,288 psi | 55% | 2310 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,036 psi | 44% | 2136 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 27,963 psi | 44% | 2146 fps | 95.2% |
| Alliant Reloder-26 | 55.2 gr | 80% | 29,762 psi | 47% | 2238 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 37,391 psi | 59% | 2352 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,921 psi | 77% | 2441 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,204 psi | 61% | 2425 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 35,288 psi | 55% | 2310 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,960 psi | 67% | 2339 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 98% | 40,074 psi | 63% | 2388 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,255 psi | 77% | 2457 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,440 psi | 70% | 2434 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,524 psi | 64% | 2326 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 94% | 43,526 psi | 68% | 2408 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 42,873 psi | 67% | 2398 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,636 psi | 56% | 2241 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,778 psi | 80% | 2490 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 34,940 psi | 55% | 2362 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,943 psi | 63% | 2392 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1381 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,531 psi | 79% | 2444 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,258 psi | 83% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,065 psi | 74% | 2385 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,151 psi | 72% | 2369 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,609 psi | 61% | 2277 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,454 psi | 70% | 2365 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 34,200 psi | 54% | 2221 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 53,185 psi | 83% | 2516 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 42,975 psi | 67% | 2365 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 41,901 psi | 66% | 2441 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,749 psi | 80% | 2431 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,018 psi | 66% | 2323 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 40,147 psi | 63% | 2306 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 28,326 psi | 44% | 2090 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,198 psi | 80% | 2480 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,116 psi | 60% | 2306 fps | 95.6% |
| Norma MRP | 55 gr | 82% | 32,300 psi | 51% | 2267 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,856 psi | 61% | 2323 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,474 psi | 81% | 2500 fps | 100% |
| Ramshot Grand | 60.8 gr | 88% | 40,683 psi | 64% | 2428 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,739 psi | 59% | 2320 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 88% | 35,346 psi | 55% | 2303 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 44% | 1414 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,037 psi | 77% | 2441 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,847 psi | 72% | 2487 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,841 psi | 61% | 2349 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,536 psi | 59% | 2359 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,142 psi | 54% | 2349 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,388 psi | 82% | 2438 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,137 psi | 72% | 2395 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,785 psi | 65% | 2349 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 36,622 psi | 57% | 2297 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,960 psi | 67% | 2339 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,018 psi | 66% | 2323 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 50,749 psi | 80% | 2431 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,147 psi | 63% | 2306 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,369 psi | 74% | 2448 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,297 psi | 74% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,031 psi | 64% | 2274 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,274 psi | 57% | 2293 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,514 psi | 73% | 2395 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,498 psi | 71% | 2392 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 35,404 psi | 55% | 2287 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 32,692 psi | 51% | 2185 fps | 95% |
| Unknown powder | <<locked>> | 80% | 41,858 psi | 66% | 2372 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,736 psi | 83% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,982 psi | 83% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,359 psi | 82% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,929 psi | 63% | 2260 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,829 psi | 66% | 2346 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 88% | 35,549 psi | 56% | 2244 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,764 psi | 81% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,453 psi | 67% | 2388 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,067 psi | 49% | 2201 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 92% | 43,279 psi | 68% | 2484 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 41,684 psi | 65% | 2448 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,218 psi | 61% | 2293 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,440 psi | 70% | 2434 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,758 psi | 39% | 2126 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,260 psi | 58% | 2283 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 96 powders for .300 WSM loaded with the .308 | 220gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,549 fps to 2,733 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 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, Ramshot Grand, Norma MRP rank at the top here: for .300 WSM with the .308 | 220gr | Sako Hammerhead 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.