Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 220gr | Lapua ScenarL bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,725 psi | 90% | 2661 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,230 psi | 87% | 2631 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,434 psi | 88% | 2759 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 55,927 psi | 88% | 2690 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 94% | 57,479 psi | 90% | 2756 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 2664 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 2635 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,159 psi | 88% | 2687 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,376 psi | 88% | 2684 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,319 psi | 90% | 2694 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,492 psi | 87% | 2684 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,609 psi | 90% | 2749 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,245 psi | 87% | 2664 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,549 psi | 85% | 2726 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,448 psi | 87% | 2749 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,259 psi | 87% | 2667 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 56,695 psi | 89% | 2736 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2733 fps | 99.6% |
| Bofors RP5 | <<locked>> | 94% | 57,609 psi | 90% | 2749 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 57,232 psi | 90% | 2631 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 2746 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 56,753 psi | 89% | 2684 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,767 psi | 87% | 2644 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 57,305 psi | 90% | 2694 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,101 psi | 88% | 2677 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,449 psi | 88% | 2608 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,261 psi | 90% | 2723 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,434 psi | 87% | 2621 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,187 psi | 86% | 2602 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,709 psi | 87% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,607 psi | 86% | 2625 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 55,361 psi | 87% | 2733 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,727 psi | 65% | 2546 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 55,941 psi | 88% | 2602 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,740 psi | 90% | 2648 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,317 psi | 87% | 2628 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,521 psi | 89% | 2677 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 41,930 psi | 66% | 2572 fps | 99.3% |
| Norma MRP | <<locked>> | 92% | 57,653 psi | 90% | 2769 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,334 psi | 90% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,101 psi | 88% | 2756 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 56,130 psi | 88% | 2674 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,433 psi | 85% | 2694 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,361 psi | 87% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,580 psi | 90% | 2736 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,853 psi | 84% | 2795 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 2756 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 57,000 psi | 89% | 2664 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 55,201 psi | 87% | 2674 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,232 psi | 90% | 2631 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,941 psi | 88% | 2602 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,740 psi | 90% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,100 psi | 86% | 2562 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,781 psi | 86% | 2671 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 54,824 psi | 86% | 2608 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 54,244 psi | 85% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,651 psi | 87% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,043 psi | 88% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,317 psi | 87% | 2605 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,056 psi | 86% | 2631 fps | 99.9% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 2690 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 84% | 54,665 psi | 86% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,653 psi | 90% | 2690 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,377 psi | 90% | 2772 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 98% | 57,217 psi | 90% | 2753 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 2756 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,807 psi | 80% | 2743 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,665 psi | 86% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,971 psi | 89% | 2687 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,319 psi | 90% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,347 psi | 87% | 2644 fps | 99.8% |
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 3100 | <<locked>> | 80% | 36,245 psi | 57% | 2310 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 48,312 psi | 76% | 2533 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 39,740 psi | 62% | 2467 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,263 psi | 63% | 2428 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 38,450 psi | 60% | 2418 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 90% | 36,999 psi | 58% | 2392 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 29,472 psi | 46% | 2251 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,596 psi | 64% | 2428 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,296 psi | 73% | 2536 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,534 psi | 84% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,234 psi | 63% | 2421 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,114 psi | 57% | 2372 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,925 psi | 55% | 2336 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,284 psi | 47% | 2260 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,334 psi | 60% | 2470 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,006 psi | 72% | 2510 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 33,736 psi | 53% | 2316 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 36,129 psi | 57% | 2405 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,114 psi | 57% | 2372 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 50,676 psi | 79% | 2533 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,346 psi | 55% | 2356 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 49,966 psi | 78% | 2582 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,286 psi | 82% | 2592 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,290 psi | 60% | 2369 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,306 psi | 63% | 2411 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,700 psi | 68% | 2428 fps | 100% |
| Hodgdon Retumbo | 64 gr | 82% | 31,502 psi | 49% | 2333 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 49,617 psi | 78% | 2612 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 44% | 1460 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,035 psi | 72% | 2474 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,982 psi | 81% | 2556 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,861 psi | 72% | 2480 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,987 psi | 63% | 2372 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 37,101 psi | 58% | 2402 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,506 psi | 57% | 2434 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,588 psi | 78% | 2507 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,993 psi | 75% | 2503 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,386 psi | 49% | 2201 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 46,267 psi | 73% | 2516 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 30,066 psi | 47% | 2293 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 37,797 psi | 59% | 2434 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 47,355 psi | 74% | 2520 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,593 psi | 57% | 2405 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,122 psi | 72% | 2523 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,400 psi | 48% | 2241 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1493 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,254 psi | 76% | 2552 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,456 psi | 73% | 2575 fps | 100% |
| ReloadSwiss RS 76 | 68.5 gr | 82% | 30,443 psi | 48% | 2306 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,146 psi | 61% | 2507 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 41,626 psi | 65% | 2408 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 39,769 psi | 62% | 2411 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,676 psi | 79% | 2533 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,588 psi | 78% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,993 psi | 75% | 2503 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,559 psi | 76% | 2464 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,436 psi | 62% | 2408 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 42,206 psi | 66% | 2398 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 44,469 psi | 70% | 2477 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,176 psi | 63% | 2395 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 52,692 psi | 83% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,631 psi | 76% | 2510 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,853 psi | 55% | 2280 fps | 96.8% |
| Vihtavuori N170 | <<locked>> | 98% | 53,577 psi | 84% | 2638 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 48,037 psi | 75% | 2516 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,073 psi | 61% | 2405 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 37,913 psi | 59% | 2425 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 86% | 38,232 psi | 60% | 2425 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 92% | 40,770 psi | 64% | 2523 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 98% | 47,413 psi | 74% | 2684 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,776 psi | 75% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,966 psi | 78% | 2582 fps | 99.9% |
| Winchester StaBALL HD | 64.2 gr | 80% | 31,125 psi | 49% | 2369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,811 psi | 58% | 2326 fps | 96.8% |
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 74 powders for .300 Weath. Mag. loaded with the .308 | 220gr | Lapua ScenarL. Hodgdon Retumbo delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,854 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, 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. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .300 Weath. Mag. 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.