Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 206gr | Peregrine Glider (Glider GRM) 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 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% | 55,796 psi | 87% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,855 psi | 89% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,578 psi | 86% | 2858 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 54,201 psi | 85% | 2795 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 55,767 psi | 87% | 2861 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,664 psi | 84% | 2825 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,037 psi | 75% | 2789 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,346 psi | 85% | 2792 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,346 psi | 85% | 2792 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,534 psi | 85% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,276 psi | 90% | 2838 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,883 psi | 88% | 2854 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,363 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,101 psi | 89% | 2884 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,925 psi | 85% | 2851 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,111 psi | 79% | 2838 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,985 psi | 89% | 2825 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 55,071 psi | 86% | 2838 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 2890 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 55,883 psi | 88% | 2854 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,013 psi | 86% | 2730 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,230 psi | 87% | 2851 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,824 psi | 86% | 2785 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,232 psi | 90% | 2799 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,477 psi | 87% | 2799 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,404 psi | 85% | 2782 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,621 psi | 86% | 2710 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,970 psi | 88% | 2966 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,201 psi | 87% | 2822 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 58% | 1739 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,072 psi | 89% | 2776 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,565 psi | 89% | 2753 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,174 psi | 90% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,231 psi | 88% | 2779 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 57,682 psi | 90% | 2897 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,526 psi | 68% | 2694 fps | 97.9% |
| Lovex S065 | <<locked>> | 84% | 57,276 psi | 90% | 2749 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,593 psi | 87% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,869 psi | 89% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,389 psi | 85% | 2776 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 43,772 psi | 69% | 2717 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 55,883 psi | 88% | 2871 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,288 psi | 87% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,607 psi | 86% | 2861 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 54,114 psi | 85% | 2772 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,087 psi | 89% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1781 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,971 psi | 89% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,622 psi | 87% | 2838 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,536 psi | 89% | 2956 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,622 psi | 87% | 2917 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 55,042 psi | 86% | 2766 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 56,826 psi | 89% | 2825 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,013 psi | 86% | 2730 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,276 psi | 90% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,593 psi | 87% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,318 psi | 88% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,405 psi | 88% | 2825 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,405 psi | 88% | 2759 fps | 99.1% |
| Somchem S365 | <<locked>> | 86% | 56,130 psi | 88% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,319 psi | 90% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,406 psi | 90% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,029 psi | 89% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,043 psi | 89% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 55,970 psi | 88% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,680 psi | 87% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,579 psi | 87% | 2871 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 55,463 psi | 87% | 2854 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2923 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2910 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,507 psi | 89% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,042 psi | 86% | 2789 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,115 psi | 88% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,334 psi | 90% | 2799 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% | 36,912 psi | 58% | 2438 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,472 psi | 78% | 2674 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,017 psi | 64% | 2608 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 41,249 psi | 65% | 2562 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 36,840 psi | 58% | 2497 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 35,665 psi | 56% | 2470 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 30,066 psi | 47% | 2372 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,684 psi | 65% | 2566 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,684 psi | 65% | 2566 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,659 psi | 75% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,307 psi | 65% | 2559 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,159 psi | 58% | 2507 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,795 psi | 56% | 2461 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,835 psi | 48% | 2382 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,740 psi | 62% | 2608 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,586 psi | 73% | 2772 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,137 psi | 74% | 2654 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 34,534 psi | 54% | 2444 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 34,896 psi | 55% | 2484 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 37,159 psi | 58% | 2507 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 51,605 psi | 81% | 2677 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 33,968 psi | 53% | 2431 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 51,213 psi | 80% | 2730 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,722 psi | 84% | 2743 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,291 psi | 62% | 2503 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,653 psi | 61% | 2490 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,846 psi | 70% | 2566 fps | 100% |
| Hodgdon Retumbo | 71 gr | 82% | 32,242 psi | 51% | 2464 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 51,300 psi | 80% | 2762 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,065 psi | 74% | 2615 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,156 psi | 83% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,065 psi | 74% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,828 psi | 64% | 2503 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 37,971 psi | 60% | 2536 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,375 psi | 55% | 2516 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,517 psi | 79% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,965 psi | 77% | 2648 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,734 psi | 50% | 2316 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 47,529 psi | 74% | 2661 fps | 99% |
| Norma 217 | <<locked>> | 90% | 30,879 psi | 48% | 2418 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,030 psi | 61% | 2572 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 48,530 psi | 76% | 2661 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,998 psi | 55% | 2480 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,398 psi | 74% | 2667 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,067 psi | 49% | 2362 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 45% | 1591 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,632 psi | 78% | 2700 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,008 psi | 75% | 2720 fps | 100% |
| ReloadSwiss RS 76 | 74.2 gr | 80% | 29,095 psi | 46% | 2369 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,886 psi | 64% | 2654 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 42,467 psi | 67% | 2543 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 40,683 psi | 64% | 2546 fps | 98% |
| Rottweil R 907 | <<locked>> | 80% | 51,605 psi | 81% | 2677 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,517 psi | 79% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,965 psi | 77% | 2648 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,487 psi | 78% | 2605 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,364 psi | 63% | 2543 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 43,192 psi | 68% | 2536 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 45,658 psi | 72% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,162 psi | 65% | 2530 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 53,824 psi | 84% | 2641 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,879 psi | 78% | 2654 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,679 psi | 56% | 2405 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 49,139 psi | 77% | 2661 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,045 psi | 63% | 2536 fps | 100% |
| Vihtavuori N560 | 71.9 gr | 80% | 39,088 psi | 61% | 2562 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 36,666 psi | 57% | 2497 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 42,250 psi | 66% | 2664 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 49,690 psi | 78% | 2844 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,211 psi | 77% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,387 psi | 81% | 2733 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,445 psi | 51% | 2493 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,681 psi | 59% | 2457 fps | 97% |
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 | 206gr | Peregrine Glider (Glider GRM). Hodgdon Retumbo delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,739 fps to 2,966 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 206.0 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, Vihtavuori N560 rank at the top here: for .300 Norma Mag. with the .308 | 206gr | Peregrine Glider (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.