Load Specifications
Load data in caliber .300 WSM with .308 | 220gr | Alaska Bullet Works Kodiak PP SPBC 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.
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% | 57,043 psi | 89% | 2451 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,608 psi | 87% | 2493 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2582 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,595 psi | 90% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,737 psi | 86% | 2572 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,940 psi | 86% | 2671 fps | 97% |
| ADI AR 2208 | <<locked>> | 86% | 57,217 psi | 90% | 2536 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,448 psi | 87% | 2618 fps | 99.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2671 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,564 psi | 57% | 2372 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,927 psi | 89% | 2654 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,868 psi | 86% | 2513 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,013 psi | 86% | 2536 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,608 psi | 87% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,811 psi | 89% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,984 psi | 86% | 2612 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2664 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,765 psi | 83% | 2592 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,948 psi | 72% | 2546 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,637 psi | 89% | 2726 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 2598 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 55,782 psi | 87% | 2533 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 41,713 psi | 65% | 2474 fps | 96.4% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2664 fps | 99.5% |
| Bofors RP7 | <<locked>> | 88% | 54,911 psi | 86% | 2526 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,438 psi | 67% | 2431 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 84% | 55,796 psi | 87% | 2546 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,273 psi | 85% | 2589 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 90% | 54,984 psi | 86% | 2562 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2552 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,666 psi | 87% | 2598 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,796 psi | 87% | 2546 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,479 psi | 90% | 2579 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,991 psi | 71% | 2585 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 90% | 57,101 psi | 89% | 2661 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,884 psi | 89% | 2526 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,695 psi | 89% | 2497 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,304 psi | 88% | 2513 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,969 psi | 86% | 2500 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 55,970 psi | 88% | 2559 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,608 psi | 89% | 2549 fps | 99.9% |
| IMR 4831 | <<locked>> | 96% | 55,941 psi | 88% | 2572 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,449 psi | 88% | 2559 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,824 psi | 86% | 2552 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 54,462 psi | 85% | 2651 fps | 98.4% |
| Lovex S062 | <<locked>> | 84% | 57,072 psi | 89% | 2513 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,782 psi | 89% | 2546 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 54,607 psi | 86% | 2539 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2451 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 54,346 psi | 85% | 2523 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,637 psi | 89% | 2612 fps | 99.3% |
| Norma MRP | <<locked>> | 98% | 55,535 psi | 87% | 2690 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,087 psi | 89% | 2605 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,897 psi | 86% | 2546 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,201 psi | 85% | 2657 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,593 psi | 87% | 2608 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,766 psi | 86% | 2638 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1588 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,651 psi | 87% | 2536 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,130 psi | 88% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,607 psi | 86% | 2595 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,507 psi | 89% | 2671 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,730 psi | 70% | 2579 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,622 psi | 87% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,927 psi | 88% | 2530 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,203 psi | 90% | 2592 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 96% | 54,215 psi | 85% | 2598 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,911 psi | 86% | 2526 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,782 psi | 89% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,072 psi | 89% | 2513 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,607 psi | 86% | 2539 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,145 psi | 90% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,652 psi | 89% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,144 psi | 88% | 2503 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,450 psi | 90% | 2644 fps | 99.5% |
| Somchem S355 | <<locked>> | 86% | 55,782 psi | 87% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,201 psi | 87% | 2536 fps | 97.7% |
| Somchem S365 | <<locked>> | 94% | 56,376 psi | 88% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,723 psi | 86% | 2572 fps | 99.6% |
| Unknown powder | <<locked>> | 90% | 57,479 psi | 90% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 55,709 psi | 87% | 2388 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 56,028 psi | 88% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,550 psi | 87% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,334 psi | 90% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,346 psi | 85% | 2533 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2526 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 55,143 psi | 86% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,897 psi | 86% | 2579 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,434 psi | 87% | 2615 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2690 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2552 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,853 psi | 86% | 2520 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,273 psi | 85% | 2589 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,608 psi | 89% | 2592 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% | 53,679 psi | 84% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,832 psi | 72% | 2349 fps | 98.4% |
| Accurate 3100 | <<locked>> | 80% | 28,761 psi | 45% | 2100 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,937 psi | 80% | 2421 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,030 psi | 61% | 2329 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 96% | 47,819 psi | 75% | 2559 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,761 psi | 75% | 2405 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,724 psi | 59% | 2316 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 40,727 psi | 64% | 2402 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 32,271 psi | 51% | 2267 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,968 psi | 83% | 2602 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,501 psi | 76% | 2428 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,619 psi | 81% | 2490 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,956 psi | 59% | 2336 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,946 psi | 67% | 2444 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,550 psi | 59% | 2313 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,536 psi | 59% | 2356 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,891 psi | 44% | 2133 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 27,847 psi | 44% | 2139 fps | 95% |
| Alliant Reloder-26 | 55.1 gr | 80% | 29,776 psi | 47% | 2238 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 37,202 psi | 58% | 2349 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,950 psi | 77% | 2441 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,059 psi | 61% | 2421 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 37,536 psi | 59% | 2356 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,975 psi | 67% | 2336 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 98% | 39,726 psi | 62% | 2379 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 49,052 psi | 77% | 2454 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,469 psi | 70% | 2434 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,306 psi | 63% | 2320 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 94% | 43,352 psi | 68% | 2405 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 42,699 psi | 67% | 2395 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,433 psi | 56% | 2238 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,517 psi | 79% | 2487 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 34,838 psi | 55% | 2359 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 39,755 psi | 62% | 2385 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,299 psi | 79% | 2438 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,272 psi | 83% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,065 psi | 74% | 2385 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,948 psi | 72% | 2362 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,406 psi | 60% | 2274 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,266 psi | 69% | 2359 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 34,026 psi | 53% | 2215 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 52,939 psi | 83% | 2510 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 42,815 psi | 67% | 2359 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 41,742 psi | 65% | 2434 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 50,517 psi | 79% | 2428 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,858 psi | 66% | 2320 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 40,161 psi | 63% | 2306 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 28,152 psi | 44% | 2087 fps | 95% |
| Norma 203B | <<locked>> | 80% | 50,952 psi | 80% | 2477 fps | 100% |
| Norma 204 | <<locked>> | 80% | 37,956 psi | 59% | 2300 fps | 95.5% |
| Norma MRP | 54.8 gr | 82% | 32,140 psi | 50% | 2260 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,841 psi | 61% | 2323 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,285 psi | 80% | 2500 fps | 100% |
| Ramshot Grand | 60.6 gr | 88% | 40,524 psi | 64% | 2425 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 37,565 psi | 59% | 2316 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 88% | 35,201 psi | 55% | 2300 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 44% | 1414 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,081 psi | 77% | 2441 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,629 psi | 72% | 2484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,827 psi | 61% | 2349 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,347 psi | 59% | 2352 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,026 psi | 53% | 2343 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 52,417 psi | 82% | 2438 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,151 psi | 72% | 2395 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,771 psi | 65% | 2346 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 36,651 psi | 57% | 2297 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,975 psi | 67% | 2336 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,858 psi | 66% | 2320 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 50,517 psi | 79% | 2428 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,161 psi | 63% | 2306 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,181 psi | 74% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,065 psi | 74% | 2293 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,828 psi | 64% | 2267 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,303 psi | 57% | 2293 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,267 psi | 73% | 2392 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,339 psi | 71% | 2388 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,172 psi | 55% | 2283 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 32,706 psi | 51% | 2185 fps | 95% |
| Unknown powder | <<locked>> | 80% | 41,669 psi | 65% | 2369 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,765 psi | 83% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,692 psi | 83% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,127 psi | 82% | 2405 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,726 psi | 62% | 2257 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,800 psi | 66% | 2346 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 88% | 35,404 psi | 55% | 2241 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,793 psi | 81% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,235 psi | 66% | 2385 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 30,893 psi | 48% | 2195 fps | 98.4% |
| Vihtavuori N560 | <<locked>> | 92% | 43,105 psi | 68% | 2480 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 41,524 psi | 65% | 2444 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,059 psi | 61% | 2290 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,469 psi | 70% | 2434 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,627 psi | 39% | 2123 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,086 psi | 58% | 2280 fps | 95.4% |
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 | Alaska Bullet Works Kodiak PP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,549 fps to 2,726 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 | Alaska Bullet Works Kodiak PP SPBC 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.