Load Specifications
Bullet Manufacturer:TWENTY-NINE
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:1:9.5
Load data in caliber .300 H&H Mag. with .308 | 180gr | TWENTY-NINE ERTP bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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% | 56,362 psi | 90% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,607 psi | 88% | 2710 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2680 fps | 98.2% |
| Accurate 4064 | <<locked>> | 86% | 53,084 psi | 85% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,127 psi | 85% | 2799 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,999 psi | 90% | 2779 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,679 psi | 86% | 2733 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2828 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,824 psi | 88% | 2726 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,347 psi | 90% | 2697 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,072 psi | 90% | 2904 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2825 fps | 97.3% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2825 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,215 psi | 87% | 2756 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,505 psi | 87% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,882 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,245 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2815 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2753 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,280 psi | 71% | 2703 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,972 psi | 62% | 2615 fps | 96.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,314 psi | 81% | 2884 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,840 psi | 90% | 2795 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,766 psi | 88% | 2769 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2753 fps | 95.9% |
| Bofors RP7 | <<locked>> | 92% | 54,578 psi | 88% | 2749 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,246 psi | 90% | 2707 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,592 psi | 88% | 2759 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,376 psi | 89% | 2785 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,724 psi | 89% | 2848 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 55,738 psi | 89% | 2805 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 53,156 psi | 85% | 2736 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,114 psi | 87% | 2776 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,881 psi | 85% | 2772 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,028 psi | 90% | 2887 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 58% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,447 psi | 87% | 2743 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,693 psi | 86% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,316 psi | 85% | 2717 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,318 psi | 90% | 2753 fps | 98.8% |
| IMR 4350 | <<locked>> | 96% | 55,013 psi | 88% | 2776 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,391 psi | 90% | 2779 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 53,679 psi | 86% | 2789 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,898 psi | 90% | 2805 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,824 psi | 88% | 2726 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,333 psi | 90% | 2756 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,347 psi | 89% | 2710 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,316 psi | 85% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,130 psi | 90% | 2776 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 53,722 psi | 86% | 2759 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,001 psi | 63% | 2533 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 54,998 psi | 88% | 2726 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,332 psi | 89% | 2720 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,751 psi | 86% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,840 psi | 90% | 2828 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 49,588 psi | 80% | 2835 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 55,550 psi | 89% | 2835 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,244 psi | 87% | 2789 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,317 psi | 87% | 2835 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 55,027 psi | 88% | 2753 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,027 psi | 88% | 2769 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,622 psi | 89% | 2772 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,245 psi | 89% | 2841 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,766 psi | 88% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,852 psi | 85% | 2818 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,448 psi | 89% | 2900 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,796 psi | 89% | 2703 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,347 psi | 89% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,897 psi | 88% | 2766 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2802 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2802 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 54,578 psi | 88% | 2749 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,130 psi | 90% | 2776 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,333 psi | 90% | 2756 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,316 psi | 85% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,722 psi | 86% | 2759 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,011 psi | 85% | 2776 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,693 psi | 86% | 2730 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,534 psi | 87% | 2753 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,014 psi | 90% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,391 psi | 90% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,072 psi | 90% | 2730 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2799 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 55,666 psi | 89% | 2661 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,432 psi | 86% | 2720 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,853 psi | 88% | 2759 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,012 psi | 87% | 2835 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2779 fps | 98% |
| Vihtavuori N133 | <<locked>> | 84% | 56,420 psi | 90% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,521 psi | 89% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,985 psi | 90% | 2700 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,202 psi | 90% | 2736 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,418 psi | 87% | 2779 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,716 psi | 73% | 2644 fps | 96% |
| Vihtavuori N530 | <<locked>> | 82% | 55,274 psi | 89% | 2726 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,099 psi | 87% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,403 psi | 86% | 2782 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,472 psi | 79% | 2782 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,143 psi | 87% | 2753 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,695 psi | 89% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,724 psi | 89% | 2848 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,740 psi | 64% | 2736 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,592 psi | 88% | 2762 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 2717 fps | 96.2% |
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 2495 | <<locked>> | 80% | 46,398 psi | 74% | 2562 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,947 psi | 72% | 2549 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 35,839 psi | 57% | 2467 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,903 psi | 70% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,880 psi | 53% | 2411 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 80% | 49,603 psi | 80% | 2680 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,989 psi | 67% | 2533 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 47,776 psi | 77% | 2717 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,706 psi | 83% | 2680 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,939 psi | 85% | 2654 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,542 psi | 73% | 2730 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,817 psi | 72% | 2664 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,817 psi | 72% | 2664 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,134 psi | 68% | 2559 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,223 psi | 73% | 2625 fps | 99.5% |
| Alliant Reloder-16 | 50.2 gr | 80% | 32,721 psi | 52% | 2421 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,651 psi | 59% | 2546 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,137 psi | 76% | 2710 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,961 psi | 70% | 2697 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,992 psi | 43% | 2287 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,593 psi | 59% | 2556 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,909 psi | 53% | 2510 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,052 psi | 79% | 2690 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 42,105 psi | 68% | 2566 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 43,961 psi | 70% | 2697 fps | 95% |
| Bofors RP7 | <<locked>> | 84% | 42,511 psi | 68% | 2539 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,113 psi | 85% | 2661 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,024 psi | 82% | 2707 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,757 psi | 69% | 2572 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 39,842 psi | 64% | 2566 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 43,265 psi | 69% | 2589 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,154 psi | 80% | 2690 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,226 psi | 48% | 2326 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,456 psi | 74% | 2671 fps | 100% |
| Hodgdon Superformance | 61.4 gr | 86% | 41,930 psi | 67% | 2635 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 43% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,906 psi | 77% | 2641 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,212 psi | 81% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,150 psi | 71% | 2566 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,659 psi | 75% | 2592 fps | 97.2% |
| IMR 4350 | <<locked>> | 86% | 40,335 psi | 65% | 2520 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,914 psi | 62% | 2467 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 31,778 psi | 51% | 2372 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,369 psi | 74% | 2651 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,706 psi | 83% | 2680 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,226 psi | 79% | 2654 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,052 psi | 79% | 2612 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,440 psi | 71% | 2572 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,448 psi | 58% | 2418 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 39,320 psi | 63% | 2500 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 36,579 psi | 59% | 2484 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,399 psi | 78% | 2628 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,921 psi | 78% | 2628 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,599 psi | 72% | 2612 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 45,600 psi | 73% | 2657 fps | 95% |
| Norma MRP | <<locked>> | 94% | 40,553 psi | 65% | 2657 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,996 psi | 53% | 2411 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 44,309 psi | 71% | 2628 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,579 psi | 59% | 2503 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,561 psi | 83% | 2697 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,416 psi | 82% | 2717 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 44% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,844 psi | 69% | 2552 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,095 psi | 77% | 2730 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,986 psi | 63% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,416 psi | 52% | 2425 fps | 95.5% |
| ReloadSwiss RS 70 | 56.3 gr | 82% | 34,432 psi | 55% | 2484 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 52,620 psi | 84% | 2657 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,151 psi | 74% | 2582 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,682 psi | 64% | 2513 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 98% | 52,895 psi | 85% | 2749 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 96% | 45,948 psi | 74% | 2690 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 42,511 psi | 68% | 2539 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,448 psi | 58% | 2418 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,226 psi | 79% | 2654 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,440 psi | 71% | 2572 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,320 psi | 63% | 2500 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,553 psi | 65% | 2562 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,125 psi | 80% | 2677 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,892 psi | 77% | 2651 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,661 psi | 80% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,684 psi | 67% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,218 psi | 61% | 2421 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,498 psi | 73% | 2687 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,139 psi | 79% | 2569 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,922 psi | 80% | 2667 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,176 psi | 64% | 2513 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 29,631 psi | 48% | 2369 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 40,901 psi | 66% | 2566 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 50,111 psi | 80% | 2559 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,166 psi | 74% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,412 psi | 74% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,334 psi | 61% | 2451 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,432 psi | 55% | 2415 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 43,033 psi | 69% | 2595 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 51,822 psi | 83% | 2677 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,788 psi | 72% | 2559 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,881 psi | 54% | 2415 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 29,211 psi | 47% | 2362 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,852 psi | 54% | 2388 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 52,170 psi | 84% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 40,045 psi | 64% | 2572 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,035 psi | 43% | 2362 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,819 psi | 77% | 2657 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,528 psi | 75% | 2661 fps | 95.4% |
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 105 powders for .300 H&H Mag. loaded with the .308 | 180gr | TWENTY-NINE ERTP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,904 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .300 H&H Mag. with the .308 | 180gr | 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.