Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 216gr | Peregrine Glider GRM bullet and 72 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 IMR 7828 SSC.
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% | 57,072 psi | 89% | 2717 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,317 psi | 85% | 2684 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,217 psi | 88% | 2822 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 55,463 psi | 87% | 2749 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,305 psi | 90% | 2822 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 2789 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,487 psi | 78% | 2753 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,622 psi | 87% | 2749 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,898 psi | 88% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,955 psi | 86% | 2740 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,406 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,129 psi | 86% | 2720 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,897 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,463 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 2808 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,592 psi | 86% | 2730 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 56,565 psi | 89% | 2799 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 54,375 psi | 85% | 2799 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 57,406 psi | 90% | 2812 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 56,101 psi | 88% | 2684 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,753 psi | 89% | 2812 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 55,941 psi | 88% | 2740 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,869 psi | 89% | 2759 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,753 psi | 87% | 2740 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,767 psi | 87% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,667 psi | 90% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,666 psi | 89% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 59% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,607 psi | 86% | 2677 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,667 psi | 90% | 2707 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,940 psi | 86% | 2677 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,421 psi | 90% | 2736 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 55,419 psi | 87% | 2799 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,991 psi | 71% | 2664 fps | 98.6% |
| Lovex S065 | <<locked>> | 82% | 54,897 psi | 86% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,797 psi | 89% | 2703 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,853 psi | 86% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,767 psi | 87% | 2733 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 45,368 psi | 71% | 2687 fps | 99.8% |
| Norma MRP | <<locked>> | 90% | 57,522 psi | 90% | 2828 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,637 psi | 89% | 2720 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,434 psi | 88% | 2825 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 55,506 psi | 87% | 2730 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,549 psi | 85% | 2756 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1736 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,665 psi | 86% | 2710 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,116 psi | 90% | 2789 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,099 psi | 85% | 2858 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 2881 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 56,420 psi | 88% | 2723 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 54,679 psi | 86% | 2733 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 56,101 psi | 88% | 2684 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,897 psi | 86% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,797 psi | 89% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,522 psi | 90% | 2661 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,288 psi | 85% | 2726 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,725 psi | 90% | 2720 fps | 99.5% |
| Somchem S365 | <<locked>> | 86% | 57,493 psi | 90% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,810 psi | 86% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,505 psi | 85% | 2657 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,607 psi | 86% | 2687 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,101 psi | 89% | 2759 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 84% | 57,348 psi | 90% | 2717 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,101 psi | 89% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,174 psi | 90% | 2831 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 57,232 psi | 90% | 2818 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,259 psi | 85% | 2822 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2877 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 53,809 psi | 84% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,173 psi | 88% | 2743 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,940 psi | 85% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,824 psi | 86% | 2703 fps | 99.9% |
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% | 37,927 psi | 59% | 2402 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 50,705 psi | 79% | 2628 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,233 psi | 61% | 2513 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 42,453 psi | 67% | 2533 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 37,811 psi | 59% | 2467 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 34,156 psi | 54% | 2385 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 28,877 psi | 45% | 2290 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,699 psi | 67% | 2530 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,994 psi | 77% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,308 psi | 66% | 2523 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,203 psi | 60% | 2474 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,825 psi | 58% | 2425 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,821 psi | 50% | 2359 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,988 psi | 64% | 2572 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 44,643 psi | 70% | 2677 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,208 psi | 71% | 2562 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 35,491 psi | 56% | 2411 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 33,518 psi | 53% | 2395 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 38,203 psi | 60% | 2474 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 52,794 psi | 83% | 2635 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 32,489 psi | 51% | 2343 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 52,431 psi | 82% | 2684 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,306 psi | 63% | 2470 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,653 psi | 62% | 2457 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,905 psi | 72% | 2520 fps | 100% |
| Hodgdon Retumbo | 68.4 gr | 80% | 31,024 psi | 49% | 2379 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 52,591 psi | 82% | 2720 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 44% | 1512 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,240 psi | 76% | 2579 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,157 psi | 85% | 2654 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,167 psi | 75% | 2579 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,872 psi | 66% | 2470 fps | 97% |
| IMR 7828 SSC | 68.3 gr | 80% | 36,419 psi | 57% | 2448 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,127 psi | 53% | 2431 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,503 psi | 81% | 2602 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,995 psi | 78% | 2602 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,590 psi | 51% | 2283 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 48,501 psi | 76% | 2618 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 29,863 psi | 47% | 2339 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,234 psi | 63% | 2539 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 49,676 psi | 78% | 2618 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,071 psi | 57% | 2454 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,414 psi | 76% | 2621 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,053 psi | 50% | 2336 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 45% | 1552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,966 psi | 80% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,429 psi | 77% | 2680 fps | 100% |
| ReloadSwiss RS 76 | 73.2 gr | 80% | 29,936 psi | 47% | 2349 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,088 psi | 61% | 2559 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 43,569 psi | 68% | 2510 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 41,742 psi | 65% | 2510 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 52,794 psi | 83% | 2635 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,503 psi | 81% | 2602 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,995 psi | 78% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,488 psi | 79% | 2559 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,408 psi | 65% | 2507 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 44,237 psi | 69% | 2500 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 47,079 psi | 74% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,206 psi | 66% | 2493 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 51,053 psi | 80% | 2608 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,608 psi | 57% | 2375 fps | 97.7% |
| Vihtavuori N170 | <<locked>> | 96% | 53,287 psi | 84% | 2700 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 50,299 psi | 79% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,147 psi | 64% | 2497 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,234 psi | 63% | 2533 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 35,244 psi | 55% | 2411 fps | 95% |
| Vihtavuori N568 | <<locked>> | 90% | 40,669 psi | 64% | 2575 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 47,747 psi | 75% | 2749 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,270 psi | 79% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,634 psi | 82% | 2690 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,692 psi | 53% | 2464 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,696 psi | 61% | 2425 fps | 97.8% |
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 72 powders for .300 Norma Mag. loaded with the .308 | 216gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,923 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 216.0 gr projectile in 0.308" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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 76, IMR 7828 SSC rank at the top here: for .300 Norma Mag. with the .308 | 216gr | Peregrine Glider GRM 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.