Load Specifications
Bullet:.308 | 180gr | Hornady GMX
Bullet Manufacturer:Hornady
Bullet Weight:180 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 H&H Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:10.5
Load data in caliber .300 H&H Mag. with .308 | 180gr | Hornady GMX bullet and 104 powders. The key underlying parameters are shown in the table above.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 55,709 psi | 89% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,549 psi | 87% | 2726 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2694 fps | 98.4% |
| Accurate 4064 | <<locked>> | 88% | 56,014 psi | 90% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 52,852 psi | 85% | 2805 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 51,314 psi | 82% | 2877 fps | 96% |
| ADI AR 2206H | <<locked>> | 84% | 55,956 psi | 90% | 2792 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,896 psi | 86% | 2749 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2844 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,824 psi | 88% | 2740 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,649 psi | 84% | 2864 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,505 psi | 87% | 2844 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,070 psi | 87% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,607 psi | 88% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,215 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,521 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2835 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2769 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,454 psi | 71% | 2720 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,754 psi | 62% | 2625 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,357 psi | 81% | 2897 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,217 psi | 90% | 2815 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,650 psi | 88% | 2782 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2769 fps | 96.1% |
| Bofors RP7 | <<locked>> | 92% | 54,534 psi | 87% | 2762 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,289 psi | 90% | 2720 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,360 psi | 87% | 2766 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,332 psi | 89% | 2799 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 55,622 psi | 89% | 2861 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 56,086 psi | 90% | 2825 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 53,113 psi | 85% | 2749 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,346 psi | 87% | 2792 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,026 psi | 85% | 2785 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,260 psi | 90% | 2904 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 58% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,447 psi | 87% | 2756 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,548 psi | 86% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,272 psi | 85% | 2730 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,202 psi | 90% | 2762 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 55,230 psi | 89% | 2792 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,069 psi | 85% | 2743 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 53,519 psi | 86% | 2799 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 56,043 psi | 90% | 2818 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,824 psi | 88% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,072 psi | 90% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,129 psi | 88% | 2720 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,127 psi | 85% | 2723 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,014 psi | 90% | 2789 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 53,737 psi | 86% | 2776 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,711 psi | 62% | 2543 fps | 96.5% |
| Norma 201 | <<locked>> | 84% | 54,505 psi | 87% | 2733 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,274 psi | 89% | 2733 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,853 psi | 86% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,985 psi | 90% | 2844 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 49,719 psi | 80% | 2851 fps | 98.1% |
| Norma URP | <<locked>> | 96% | 55,724 psi | 89% | 2848 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,578 psi | 88% | 2805 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,418 psi | 87% | 2848 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 55,129 psi | 88% | 2769 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,853 psi | 88% | 2779 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 58% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,579 psi | 89% | 2782 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,201 psi | 89% | 2854 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,071 psi | 88% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,866 psi | 85% | 2831 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,724 psi | 89% | 2917 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,245 psi | 89% | 2710 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,143 psi | 88% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,795 psi | 88% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,069 psi | 85% | 2766 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2818 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 54,534 psi | 87% | 2762 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,014 psi | 90% | 2789 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,072 psi | 90% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,127 psi | 85% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,737 psi | 86% | 2776 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,026 psi | 85% | 2789 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,650 psi | 86% | 2746 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,404 psi | 87% | 2762 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,825 psi | 90% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,142 psi | 85% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,130 psi | 90% | 2743 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 2812 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 55,259 psi | 89% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,258 psi | 85% | 2733 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,839 psi | 88% | 2772 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,215 psi | 87% | 2848 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,258 psi | 85% | 2795 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 56,289 psi | 90% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,463 psi | 89% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,883 psi | 90% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 52,939 psi | 85% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,360 psi | 87% | 2789 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,890 psi | 74% | 2661 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 82% | 55,274 psi | 89% | 2740 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,114 psi | 87% | 2710 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,476 psi | 86% | 2795 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,443 psi | 79% | 2792 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,201 psi | 87% | 2766 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,608 psi | 89% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,912 psi | 90% | 2864 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,639 psi | 64% | 2749 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,389 psi | 87% | 2772 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2733 fps | 96.5% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 45,818 psi | 73% | 2569 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,744 psi | 72% | 2562 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 35,360 psi | 57% | 2470 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,439 psi | 70% | 2569 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,285 psi | 52% | 2411 fps | 96.1% |
| Accurate High Country | <<locked>> | 98% | 47,979 psi | 77% | 2822 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 49,327 psi | 79% | 2690 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,003 psi | 67% | 2546 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 44,889 psi | 72% | 2674 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,503 psi | 83% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,455 psi | 73% | 2740 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,672 psi | 72% | 2674 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,800 psi | 67% | 2566 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,889 psi | 72% | 2631 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,358 psi | 52% | 2428 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,405 psi | 58% | 2552 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,106 psi | 71% | 2664 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 44,106 psi | 71% | 2710 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,195 psi | 45% | 2339 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,142 psi | 55% | 2507 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,445 psi | 52% | 2513 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,892 psi | 78% | 2700 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 41,742 psi | 67% | 2572 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 44,106 psi | 71% | 2710 fps | 95.2% |
| Bofors RP7 | <<locked>> | 84% | 42,293 psi | 68% | 2549 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,953 psi | 85% | 2674 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,807 psi | 81% | 2717 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,511 psi | 68% | 2582 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 39,798 psi | 64% | 2579 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 43,105 psi | 69% | 2598 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,850 psi | 80% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,849 psi | 48% | 2329 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,383 psi | 74% | 2680 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,887 psi | 67% | 2648 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 43% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,732 psi | 77% | 2651 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,082 psi | 80% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,150 psi | 71% | 2579 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,398 psi | 74% | 2602 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 40,292 psi | 65% | 2530 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,841 psi | 62% | 2480 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 31,444 psi | 50% | 2372 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,021 psi | 74% | 2661 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,503 psi | 83% | 2690 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,979 psi | 79% | 2664 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,921 psi | 78% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,063 psi | 71% | 2575 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,187 psi | 58% | 2428 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 38,972 psi | 62% | 2507 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 36,303 psi | 58% | 2490 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 48,225 psi | 77% | 2638 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,660 psi | 78% | 2638 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,222 psi | 71% | 2618 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 45,513 psi | 73% | 2671 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 40,379 psi | 65% | 2667 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,590 psi | 52% | 2415 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 44,164 psi | 71% | 2638 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,274 psi | 58% | 2510 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,372 psi | 82% | 2707 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,329 psi | 82% | 2726 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 43% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,627 psi | 68% | 2566 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,051 psi | 77% | 2743 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,812 psi | 62% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,053 psi | 51% | 2425 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,055 psi | 55% | 2490 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 52,141 psi | 84% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,774 psi | 73% | 2592 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,131 psi | 63% | 2516 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 49,734 psi | 80% | 2710 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 43,018 psi | 69% | 2648 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 42,293 psi | 68% | 2549 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,187 psi | 58% | 2428 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,979 psi | 79% | 2664 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,063 psi | 71% | 2575 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,972 psi | 62% | 2507 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,393 psi | 65% | 2572 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,821 psi | 80% | 2684 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,790 psi | 77% | 2661 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,255 psi | 79% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,278 psi | 66% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,652 psi | 60% | 2421 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,600 psi | 73% | 2700 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 49,052 psi | 79% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,763 psi | 80% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,943 psi | 64% | 2523 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 29,167 psi | 47% | 2369 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 40,828 psi | 65% | 2575 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 49,792 psi | 80% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,701 psi | 73% | 2559 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,151 psi | 74% | 2572 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,942 psi | 61% | 2457 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,026 psi | 55% | 2418 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 42,960 psi | 69% | 2605 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 51,808 psi | 83% | 2687 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,628 psi | 72% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,576 psi | 54% | 2418 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 28,747 psi | 46% | 2359 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,518 psi | 54% | 2395 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 52,156 psi | 84% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 39,798 psi | 64% | 2579 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,556 psi | 43% | 2362 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,688 psi | 76% | 2667 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,456 psi | 74% | 2671 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 104 powders for .300 H&H Mag. loaded with the .308 | 180gr | Hornady GMX. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,917 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.