Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 190gr | TWENTY-NINE ERTP 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>> | 92% | 54,578 psi | 86% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,695 psi | 87% | 2871 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,130 psi | 88% | 2992 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 92% | 57,043 psi | 89% | 2999 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 56,405 psi | 88% | 2930 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 54,288 psi | 85% | 2936 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2897 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,789 psi | 73% | 2861 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,550 psi | 89% | 2927 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,550 psi | 89% | 2927 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,681 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,609 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,869 psi | 88% | 2917 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,505 psi | 85% | 2933 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,695 psi | 87% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,274 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,173 psi | 88% | 2989 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,680 psi | 87% | 2897 fps | 96.6% |
| Bofors RP15 | <<locked>> | 96% | 57,246 psi | 90% | 2976 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 2969 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 54,505 psi | 85% | 2933 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 57,537 psi | 90% | 2871 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 2989 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,203 psi | 90% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,985 psi | 88% | 2881 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 54,012 psi | 85% | 2874 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,753 psi | 89% | 2917 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,913 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,099 psi | 85% | 3041 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,693 psi | 84% | 2900 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 58% | 1811 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,767 psi | 87% | 2858 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,506 psi | 87% | 2838 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,869 psi | 88% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,027 psi | 86% | 2858 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 56,014 psi | 88% | 2976 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,250 psi | 66% | 2759 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 56,260 psi | 88% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,563 psi | 86% | 2838 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,840 psi | 88% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,869 psi | 89% | 2913 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 42,569 psi | 67% | 2789 fps | 98.8% |
| Norma MRP | <<locked>> | 90% | 54,346 psi | 85% | 2956 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,580 psi | 90% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,884 psi | 89% | 2995 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 56,536 psi | 89% | 2913 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,303 psi | 87% | 2930 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1857 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,666 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,027 psi | 85% | 2920 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,824 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2986 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 90% | 57,363 psi | 90% | 2900 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 55,434 psi | 87% | 2910 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,537 psi | 90% | 2871 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,260 psi | 88% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,563 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,259 psi | 87% | 2792 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,013 psi | 86% | 2904 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 55,259 psi | 87% | 2838 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 54,650 psi | 86% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,014 psi | 88% | 2881 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,188 psi | 88% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,753 psi | 87% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,521 psi | 87% | 2861 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,940 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,447 psi | 85% | 2881 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,114 psi | 85% | 2949 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 54,157 psi | 85% | 2933 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 2992 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,114 psi | 86% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,421 psi | 90% | 2927 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,969 psi | 85% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,796 psi | 87% | 2877 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% | 36,477 psi | 57% | 2513 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 48,646 psi | 76% | 2762 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,508 psi | 62% | 2674 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 84% | 42,960 psi | 67% | 2740 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,437 psi | 63% | 2638 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 41,336 psi | 65% | 2687 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 39,871 psi | 62% | 2654 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 31,589 psi | 50% | 2493 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,886 psi | 64% | 2641 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,886 psi | 64% | 2641 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,383 psi | 73% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,809 psi | 84% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,509 psi | 63% | 2635 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,274 psi | 57% | 2575 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,114 psi | 55% | 2539 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,414 psi | 48% | 2451 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,595 psi | 60% | 2680 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,182 psi | 77% | 2779 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 36,114 psi | 57% | 2569 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 39,044 psi | 61% | 2667 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,274 psi | 57% | 2575 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 50,836 psi | 80% | 2762 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 38,087 psi | 60% | 2615 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 50,082 psi | 78% | 2812 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,431 psi | 82% | 2825 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 41,249 psi | 65% | 2635 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,352 psi | 68% | 2677 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,859 psi | 69% | 2648 fps | 100% |
| Hodgdon Retumbo | 74 gr | 84% | 33,881 psi | 53% | 2589 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,995 psi | 78% | 2841 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 44% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,209 psi | 72% | 2694 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,054 psi | 82% | 2782 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 46,093 psi | 72% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,147 psi | 63% | 2579 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 39,827 psi | 62% | 2667 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,552 psi | 62% | 2700 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,806 psi | 78% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,080 psi | 75% | 2726 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 31,473 psi | 49% | 2392 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 46,499 psi | 73% | 2740 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 32,532 psi | 51% | 2546 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 38,101 psi | 60% | 2644 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 47,442 psi | 74% | 2746 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,494 psi | 62% | 2671 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,398 psi | 73% | 2746 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 32,851 psi | 51% | 2487 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 45% | 1660 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,515 psi | 76% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,644 psi | 73% | 2799 fps | 100% |
| ReloadSwiss RS 76 | 79.2 gr | 84% | 33,025 psi | 52% | 2566 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,772 psi | 67% | 2779 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 41,742 psi | 65% | 2618 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,784 psi | 62% | 2618 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 50,836 psi | 80% | 2762 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,806 psi | 78% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,080 psi | 75% | 2726 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,588 psi | 76% | 2684 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,450 psi | 62% | 2612 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 42,351 psi | 66% | 2605 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 44,686 psi | 70% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,350 psi | 63% | 2602 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 52,794 psi | 83% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,950 psi | 77% | 2740 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,085 psi | 55% | 2477 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 48,240 psi | 76% | 2743 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,291 psi | 62% | 2615 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 40,886 psi | 64% | 2694 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 41,321 psi | 65% | 2690 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 44,251 psi | 69% | 2795 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,993 psi | 75% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,285 psi | 79% | 2815 fps | 99.8% |
| Winchester StaBALL HD | 72.4 gr | 80% | 31,357 psi | 49% | 2566 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,956 psi | 58% | 2526 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 74 powders for .300 Norma Mag. loaded with the .308 | 190gr | TWENTY-NINE ERTP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,811 fps to 3,041 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 58–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.308" calls for a 1:9.0 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 Norma Mag. with the .308 | 190gr | TWENTY-NINE ERTP 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.