Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 220gr | Nosler Ballistic Tip Hunting bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 76, Hodgdon Retumbo 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>> | 92% | 54,491 psi | 85% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,608 psi | 87% | 2638 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,710 psi | 89% | 2766 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 56,246 psi | 88% | 2697 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,186 psi | 85% | 2707 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2674 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2638 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,536 psi | 89% | 2687 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,711 psi | 90% | 2697 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,854 psi | 88% | 2687 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,389 psi | 85% | 2703 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,564 psi | 87% | 2671 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,868 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,086 psi | 88% | 2756 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,434 psi | 87% | 2671 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 57,029 psi | 89% | 2743 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2740 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 54,389 psi | 85% | 2703 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 57,595 psi | 90% | 2638 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 2753 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 57,101 psi | 89% | 2690 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,130 psi | 88% | 2651 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 57,566 psi | 90% | 2700 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,623 psi | 89% | 2687 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,826 psi | 89% | 2615 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,479 psi | 90% | 2858 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,606 psi | 84% | 2671 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,767 psi | 87% | 2628 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,492 psi | 87% | 2608 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,825 psi | 87% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,882 psi | 86% | 2628 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 55,941 psi | 88% | 2746 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,989 psi | 66% | 2552 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 56,246 psi | 88% | 2605 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,505 psi | 85% | 2605 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,651 psi | 87% | 2635 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,840 psi | 89% | 2684 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2575 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,157 psi | 85% | 2720 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,711 psi | 90% | 2671 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,710 psi | 89% | 2766 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 56,449 psi | 88% | 2680 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,955 psi | 86% | 2700 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,145 psi | 60% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,709 psi | 87% | 2661 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,896 psi | 84% | 2687 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,346 psi | 85% | 2802 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,156 psi | 83% | 2759 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 57,305 psi | 90% | 2667 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 55,521 psi | 87% | 2680 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,595 psi | 90% | 2638 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,246 psi | 88% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,505 psi | 85% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,434 psi | 87% | 2566 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,100 psi | 86% | 2677 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 55,100 psi | 86% | 2612 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 54,636 psi | 86% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,941 psi | 88% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,405 psi | 88% | 2549 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,680 psi | 87% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,361 psi | 87% | 2635 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2700 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 54,766 psi | 86% | 2618 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,302 psi | 85% | 2648 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,711 psi | 90% | 2776 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 98% | 57,464 psi | 90% | 2756 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2759 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,256 psi | 80% | 2753 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,940 psi | 86% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,319 psi | 90% | 2690 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,682 psi | 90% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,651 psi | 87% | 2648 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% | 36,521 psi | 57% | 2316 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 48,675 psi | 76% | 2539 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 40,030 psi | 63% | 2474 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 40,567 psi | 64% | 2434 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 36,172 psi | 57% | 2369 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 37,231 psi | 58% | 2395 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 29,559 psi | 46% | 2254 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,644 psi | 73% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,925 psi | 85% | 2648 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,524 psi | 64% | 2428 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,405 psi | 57% | 2379 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,070 psi | 55% | 2339 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,530 psi | 48% | 2267 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,638 psi | 61% | 2477 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,195 psi | 72% | 2513 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 33,881 psi | 53% | 2320 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 34,127 psi | 53% | 2359 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 36,405 psi | 57% | 2379 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 50,807 psi | 80% | 2536 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,578 psi | 56% | 2359 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,111 psi | 79% | 2585 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,605 psi | 82% | 2598 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 38,566 psi | 60% | 2375 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,927 psi | 59% | 2362 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,048 psi | 69% | 2434 fps | 100% |
| Hodgdon Retumbo | 64.4 gr | 82% | 31,749 psi | 50% | 2339 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 49,937 psi | 78% | 2615 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 1463 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,340 psi | 73% | 2480 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,083 psi | 82% | 2556 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,195 psi | 72% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,277 psi | 63% | 2375 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 37,202 psi | 58% | 2405 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,927 psi | 58% | 2444 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 49,734 psi | 78% | 2510 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,138 psi | 75% | 2510 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,546 psi | 49% | 2205 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 46,398 psi | 73% | 2520 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 30,298 psi | 47% | 2303 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,087 psi | 60% | 2441 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 47,500 psi | 74% | 2523 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,883 psi | 58% | 2411 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 46,253 psi | 72% | 2526 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,661 psi | 48% | 2247 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1499 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,602 psi | 76% | 2559 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,760 psi | 73% | 2579 fps | 100% |
| ReloadSwiss RS 76 | 68.9 gr | 82% | 30,661 psi | 48% | 2313 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,552 psi | 62% | 2513 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 41,771 psi | 65% | 2411 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,914 psi | 63% | 2415 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,807 psi | 80% | 2536 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,734 psi | 78% | 2510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,138 psi | 75% | 2510 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,631 psi | 76% | 2467 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,581 psi | 62% | 2411 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 42,453 psi | 67% | 2402 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 44,846 psi | 70% | 2484 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,495 psi | 63% | 2398 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 52,837 psi | 83% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,965 psi | 77% | 2516 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,143 psi | 55% | 2283 fps | 96.9% |
| Vihtavuori N170 | <<locked>> | 98% | 53,998 psi | 85% | 2644 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 48,356 psi | 76% | 2523 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,450 psi | 62% | 2411 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,189 psi | 60% | 2431 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 38,508 psi | 60% | 2431 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 41,031 psi | 64% | 2530 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 47,848 psi | 75% | 2690 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,080 psi | 75% | 2480 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,285 psi | 79% | 2589 fps | 100% |
| Winchester StaBALL HD | 64.5 gr | 80% | 31,328 psi | 49% | 2372 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,941 psi | 58% | 2329 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 77 powders for .300 Weath. Mag. loaded with the .308 | 220gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,858 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, 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. ADI AR 2217, ADI AR 2218, ADI AR 2225 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. ReloadSwiss RS 76, Hodgdon Retumbo, Winchester StaBALL HD rank at the top here: for .300 Weath. Mag. with the .308 | 220gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.