Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 180gr | Woodleigh HS bullet and 70 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 Vihtavuori N560.
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% | 56,202 psi | 88% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,101 psi | 89% | 2972 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,810 psi | 86% | 3038 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 88% | 54,215 psi | 85% | 2976 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 92% | 55,782 psi | 87% | 3038 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 3005 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2963 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,491 psi | 85% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,363 psi | 90% | 3022 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,043 psi | 88% | 3035 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,653 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,159 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,143 psi | 85% | 3035 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,188 psi | 90% | 3002 fps | 96.8% |
| Bofors RP15 | <<locked>> | 94% | 55,230 psi | 87% | 3022 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3074 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,043 psi | 88% | 3035 fps | 99.6% |
| Bofors RP7 | <<locked>> | 82% | 55,143 psi | 86% | 2913 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 55,463 psi | 87% | 3031 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 82% | 54,998 psi | 86% | 2972 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 57,290 psi | 90% | 2986 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 55,535 psi | 87% | 2976 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,563 psi | 86% | 2959 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,737 psi | 86% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,028 psi | 88% | 3150 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,419 psi | 87% | 3005 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,333 psi | 59% | 1886 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,159 psi | 90% | 2963 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,507 psi | 89% | 2940 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,479 psi | 90% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,376 psi | 88% | 2959 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 92% | 53,969 psi | 85% | 3018 fps | 98.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,019 psi | 69% | 2861 fps | 96.9% |
| Lovex S065 | <<locked>> | 84% | 57,421 psi | 90% | 2940 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,825 psi | 87% | 2936 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,435 psi | 90% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,549 psi | 85% | 2956 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 44,353 psi | 70% | 2890 fps | 98.9% |
| Norma MRP | <<locked>> | 90% | 56,115 psi | 88% | 3058 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,448 psi | 87% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,737 psi | 86% | 3041 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 84% | 54,317 psi | 85% | 2959 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,290 psi | 90% | 3035 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 1929 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,276 psi | 90% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,564 psi | 87% | 3022 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,014 psi | 89% | 3146 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3097 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 55,216 psi | 87% | 2946 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 57,072 psi | 89% | 3012 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 55,143 psi | 86% | 2913 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,421 psi | 90% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,825 psi | 87% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,521 psi | 89% | 2894 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,652 psi | 89% | 3009 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 56,681 psi | 89% | 2940 fps | 98.5% |
| Somchem S365 | <<locked>> | 86% | 56,362 psi | 88% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,638 psi | 90% | 2986 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,435 psi | 90% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,029 psi | 89% | 2946 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,261 psi | 90% | 2966 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 56,202 psi | 88% | 2949 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,072 psi | 88% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,782 psi | 87% | 3051 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 96% | 56,028 psi | 88% | 3035 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3100 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,565 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,998 psi | 86% | 2972 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,217 psi | 88% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,537 psi | 90% | 2982 fps | 99.6% |
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% | 37,550 psi | 59% | 2602 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 49,922 psi | 78% | 2861 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,425 psi | 70% | 2838 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 41,510 psi | 65% | 2733 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 42,482 psi | 67% | 2782 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 41,147 psi | 64% | 2753 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 88% | 32,561 psi | 51% | 2582 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,616 psi | 75% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,524 psi | 65% | 2726 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,405 psi | 59% | 2667 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,158 psi | 57% | 2628 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,299 psi | 49% | 2536 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,074 psi | 63% | 2776 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,386 psi | 79% | 2877 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 37,202 psi | 58% | 2657 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 37,869 psi | 59% | 2703 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 37,405 psi | 59% | 2667 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 51,851 psi | 81% | 2861 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 39,305 psi | 62% | 2710 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 51,300 psi | 80% | 2910 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 53,679 psi | 84% | 2923 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 42,322 psi | 66% | 2730 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,512 psi | 70% | 2776 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,049 psi | 71% | 2743 fps | 100% |
| Hodgdon Retumbo | 79 gr | 84% | 34,954 psi | 55% | 2684 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 51,430 psi | 81% | 2940 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,282 psi | 74% | 2792 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,200 psi | 83% | 2884 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 47,253 psi | 74% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,104 psi | 64% | 2667 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 41,046 psi | 64% | 2762 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,002 psi | 64% | 2795 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 50,850 psi | 80% | 2835 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,240 psi | 77% | 2825 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,300 psi | 51% | 2470 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 47,529 psi | 74% | 2831 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 33,678 psi | 53% | 2635 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 39,291 psi | 62% | 2736 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 48,675 psi | 76% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,872 psi | 64% | 2772 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 47,471 psi | 74% | 2841 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 33,924 psi | 53% | 2579 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 45% | 1726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,980 psi | 78% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,182 psi | 76% | 2900 fps | 100% |
| ReloadSwiss RS 76 | 84.5 gr | 84% | 34,084 psi | 53% | 2654 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,556 psi | 70% | 2881 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 42,641 psi | 67% | 2710 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 40,915 psi | 64% | 2710 fps | 97% |
| Rottweil R 907 | <<locked>> | 80% | 51,851 psi | 81% | 2861 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,850 psi | 80% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,240 psi | 77% | 2825 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,763 psi | 78% | 2782 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,582 psi | 64% | 2707 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 43,511 psi | 68% | 2700 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 45,992 psi | 72% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,466 psi | 65% | 2697 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 53,998 psi | 85% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,096 psi | 79% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,027 psi | 56% | 2566 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 49,385 psi | 77% | 2838 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,379 psi | 63% | 2707 fps | 99.9% |
| Vihtavuori N560 | 80 gr | 82% | 42,250 psi | 66% | 2792 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 42,685 psi | 67% | 2785 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 94% | 45,919 psi | 72% | 2897 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,298 psi | 77% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,488 psi | 81% | 2913 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,648 psi | 51% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,985 psi | 60% | 2618 fps | 95.9% |
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 75 powders for .300 Norma Mag. loaded with the .308 | 180gr | Woodleigh HS. Hodgdon Retumbo delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,150 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 180.0 gr projectile in 0.308" calls for a 1:13.5 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for .300 Norma Mag. with the .308 | 180gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, IMR 7977 Enduron, Vihtavuori N170 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.