Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 220gr | Hornady ELD-X bullet and 68 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 80 and Vihtavuori N570.
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>> | 90% | 56,159 psi | 88% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,116 psi | 90% | 2690 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,114 psi | 85% | 2769 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 88% | 55,013 psi | 86% | 2776 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 54,099 psi | 85% | 2703 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 55,898 psi | 88% | 2772 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 54,056 psi | 85% | 2746 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 2779 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2769 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,331 psi | 85% | 2703 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,607 psi | 86% | 2694 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,261 psi | 90% | 2746 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,275 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,346 psi | 85% | 2680 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,624 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,433 psi | 85% | 2762 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2831 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,478 psi | 89% | 2736 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 55,463 psi | 87% | 2756 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 57,392 psi | 90% | 2812 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 56,275 psi | 88% | 2766 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,608 psi | 87% | 2769 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,259 psi | 87% | 2707 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,186 psi | 85% | 2694 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,766 psi | 86% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,565 psi | 89% | 2881 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,724 psi | 89% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,203 psi | 90% | 2680 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,941 psi | 88% | 2687 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 54,201 psi | 85% | 2756 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2687 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 57,130 psi | 90% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,405 psi | 87% | 2657 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,696 psi | 90% | 2694 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,244 psi | 85% | 2687 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 48,457 psi | 76% | 2710 fps | 100% |
| Norma MRP | <<locked>> | 88% | 56,231 psi | 88% | 2782 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,230 psi | 87% | 2671 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,969 psi | 86% | 2776 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 57,667 psi | 90% | 2733 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,377 psi | 90% | 2766 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 60% | 1726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,043 psi | 89% | 2713 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,637 psi | 87% | 2740 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,217 psi | 90% | 2874 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,536 psi | 89% | 2841 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 54,984 psi | 86% | 2677 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 56,942 psi | 89% | 2736 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,130 psi | 90% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,405 psi | 87% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,883 psi | 88% | 2615 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,521 psi | 89% | 2733 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,202 psi | 88% | 2671 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 56,405 psi | 88% | 2674 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,290 psi | 90% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,840 psi | 89% | 2664 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,000 psi | 89% | 2697 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 55,753 psi | 87% | 2717 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 82% | 55,956 psi | 88% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,231 psi | 88% | 2703 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,782 psi | 87% | 2785 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 56,101 psi | 88% | 2772 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 57,246 psi | 90% | 2841 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 54,201 psi | 85% | 2835 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,014 psi | 88% | 2618 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,203 psi | 90% | 2815 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,203 psi | 90% | 2710 fps | 100% |
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% | 40,408 psi | 63% | 2425 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 53,432 psi | 84% | 2641 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,961 psi | 69% | 2592 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 80% | 41,553 psi | 65% | 2539 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 80% | 44,382 psi | 70% | 2543 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 39,682 psi | 62% | 2484 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 33,808 psi | 53% | 2352 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 46,557 psi | 73% | 2710 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 27,006 psi | 42% | 2208 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,788 psi | 70% | 2543 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,111 psi | 80% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,396 psi | 70% | 2536 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,277 psi | 63% | 2493 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,146 psi | 61% | 2441 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,750 psi | 53% | 2382 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,656 psi | 68% | 2592 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 44,034 psi | 69% | 2641 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,106 psi | 69% | 2516 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,507 psi | 59% | 2431 fps | 97.6% |
| Bofors RP30 | <<locked>> | 82% | 33,475 psi | 52% | 2369 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,277 psi | 63% | 2493 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 32,097 psi | 50% | 2310 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 42,337 psi | 66% | 2490 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,539 psi | 65% | 2474 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,022 psi | 75% | 2526 fps | 100% |
| Hodgdon Retumbo | 68.8 gr | 80% | 32,924 psi | 52% | 2408 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1506 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,082 psi | 78% | 2582 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,372 psi | 79% | 2585 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,569 psi | 68% | 2480 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 38,493 psi | 60% | 2470 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,214 psi | 54% | 2411 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 53,679 psi | 84% | 2608 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,054 psi | 82% | 2608 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,954 psi | 55% | 2313 fps | 99% |
| Norma 204 | <<locked>> | 80% | 50,662 psi | 79% | 2631 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 28,108 psi | 44% | 2267 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 42,467 psi | 67% | 2556 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 51,779 psi | 81% | 2621 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,290 psi | 60% | 2480 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,676 psi | 79% | 2631 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,229 psi | 54% | 2365 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1542 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,316 psi | 84% | 2661 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,677 psi | 81% | 2684 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,995 psi | 50% | 2385 fps | 97.7% |
| ReloadSwiss RS 80 | 81.7 gr | 88% | 38,812 psi | 61% | 2530 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 45,397 psi | 71% | 2516 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 43,990 psi | 69% | 2526 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,679 psi | 84% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,054 psi | 82% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,446 psi | 82% | 2562 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,642 psi | 68% | 2523 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 46,093 psi | 72% | 2510 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 49,400 psi | 77% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,309 psi | 69% | 2507 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 53,316 psi | 84% | 2615 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,682 psi | 61% | 2392 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 94% | 52,330 psi | 82% | 2664 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 52,576 psi | 82% | 2621 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,540 psi | 68% | 2513 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,322 psi | 66% | 2549 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 35,041 psi | 55% | 2382 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 88% | 40,219 psi | 63% | 2543 fps | 95.7% |
| Vihtavuori N570 | 84 gr | 94% | 47,181 psi | 74% | 2713 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,417 psi | 82% | 2572 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,376 psi | 57% | 2490 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,625 psi | 64% | 2438 fps | 98.4% |
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 68 powders for .300 Norma Mag. loaded with the .308 | 220gr | Hornady ELD-X. Hodgdon Retumbo delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,881 fps. ADI AR 2218 gives the best case fill at 100 %, and 68 of the 68 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 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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 80, Vihtavuori N570 rank at the top here: for .300 Norma Mag. with the .308 | 220gr | Hornady ELD-X 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.