Load Specifications
Bullet:.308 | 175gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:175 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 Win. Mag. load data
Case Length (l3):2.62"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:90.5 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:11.5
Load data in caliber .300 Win. Mag. with .308 | 175gr | Atomic 29 HP bullet and 99 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 Alliant Reloder-26.
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>> | 84% | 55,579 psi | 89% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,969 psi | 87% | 2795 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2822 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 55,999 psi | 90% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,084 psi | 85% | 2881 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,332 psi | 89% | 2858 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,316 psi | 85% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,563 psi | 87% | 2923 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2910 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,086 psi | 90% | 2992 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,592 psi | 88% | 2923 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,809 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,143 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,302 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,448 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,766 psi | 86% | 2910 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2907 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,674 psi | 76% | 2844 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,611 psi | 67% | 2759 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,056 psi | 88% | 3041 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,448 psi | 89% | 2881 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,398 psi | 74% | 2828 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,462 psi | 87% | 2851 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2907 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 54,172 psi | 87% | 2835 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 54,911 psi | 88% | 2867 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,680 psi | 89% | 2936 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,753 psi | 89% | 2897 fps | 98.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2917 fps | 96.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,839 psi | 88% | 2900 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 55,956 psi | 90% | 2867 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,360 psi | 87% | 2864 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,260 psi | 90% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,956 psi | 90% | 2972 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 58% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,606 psi | 86% | 2818 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,144 psi | 90% | 2848 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,303 psi | 89% | 2828 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 54,897 psi | 88% | 2867 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,927 psi | 90% | 2867 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 53,737 psi | 86% | 2874 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,550 psi | 89% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,143 psi | 87% | 2854 fps | 96% |
| Lovex D073.6 | <<locked>> | 82% | 55,608 psi | 89% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,317 psi | 87% | 2782 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,072 psi | 90% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,782 psi | 89% | 2861 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,534 psi | 86% | 2848 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,843 psi | 67% | 2667 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 54,085 psi | 87% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,853 psi | 88% | 2799 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,417 psi | 86% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,767 psi | 89% | 2920 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2992 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 55,738 psi | 89% | 2923 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,114 psi | 87% | 2871 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,491 psi | 87% | 2920 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,150 psi | 71% | 2762 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 59% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,143 psi | 88% | 2854 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,839 psi | 88% | 2923 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,027 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,939 psi | 85% | 2904 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,637 psi | 89% | 2992 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,636 psi | 88% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,360 psi | 87% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,333 psi | 90% | 2897 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 52,707 psi | 85% | 2894 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,172 psi | 87% | 2835 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,782 psi | 89% | 2861 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,608 psi | 89% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,072 psi | 90% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,534 psi | 86% | 2848 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,362 psi | 90% | 2910 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,795 psi | 86% | 2831 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,955 psi | 88% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,927 psi | 90% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,448 psi | 89% | 2812 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 2949 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 54,737 psi | 88% | 2733 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,636 psi | 88% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,404 psi | 87% | 2831 fps | 95.8% |
| Somchem S365 | <<locked>> | 96% | 54,781 psi | 88% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,316 psi | 85% | 2871 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,492 psi | 89% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,984 psi | 88% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,405 psi | 89% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,086 psi | 90% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,331 psi | 87% | 2864 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2789 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 53,650 psi | 86% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,301 psi | 85% | 2867 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,447 psi | 86% | 2923 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,360 psi | 87% | 2982 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,085 psi | 87% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,941 psi | 90% | 2940 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,902 psi | 69% | 2890 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,911 psi | 86% | 2838 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2864 fps | 97.6% |
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 2495 | <<locked>> | 80% | 48,660 psi | 78% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,166 psi | 76% | 2680 fps | 97.1% |
| Accurate 3100 | <<locked>> | 90% | 35,781 psi | 57% | 2539 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,151 psi | 74% | 2684 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,722 psi | 56% | 2530 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 80% | 51,982 psi | 83% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,121 psi | 71% | 2657 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,657 psi | 72% | 2746 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,631 psi | 78% | 2848 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,443 psi | 78% | 2864 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,744 psi | 72% | 2746 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,425 psi | 71% | 2684 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,485 psi | 76% | 2749 fps | 99.9% |
| Alliant Reloder-16 | 55.7 gr | 80% | 34,389 psi | 55% | 2546 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,885 psi | 62% | 2674 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,208 psi | 71% | 2740 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,295 psi | 71% | 2785 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,585 psi | 43% | 2346 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,214 psi | 55% | 2579 fps | 95.6% |
| Alliant Reloder-26 | 66.1 gr | 86% | 32,648 psi | 52% | 2579 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,909 psi | 83% | 2825 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,453 psi | 70% | 2766 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,338 psi | 71% | 2687 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,295 psi | 71% | 2785 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,204 psi | 63% | 2556 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 44,860 psi | 72% | 2697 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 37,014 psi | 59% | 2582 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 42,917 psi | 69% | 2667 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 52,344 psi | 84% | 2861 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,097 psi | 82% | 2838 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,562 psi | 84% | 2815 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,749 psi | 51% | 2441 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,298 psi | 79% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,725 psi | 62% | 2651 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 43% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,285 psi | 81% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,354 psi | 74% | 2690 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,834 psi | 78% | 2723 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 39,900 psi | 64% | 2592 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,814 psi | 65% | 2592 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 33,547 psi | 54% | 2487 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 48,704 psi | 78% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,865 psi | 82% | 2799 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 51,880 psi | 83% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,068 psi | 82% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,354 psi | 74% | 2687 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,261 psi | 61% | 2543 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 36,405 psi | 58% | 2516 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 34,418 psi | 55% | 2507 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,778 psi | 81% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,488 psi | 83% | 2753 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,818 psi | 75% | 2736 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,411 psi | 73% | 2740 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 37,768 psi | 61% | 2674 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,925 psi | 56% | 2533 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 47,007 psi | 75% | 2756 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,187 psi | 58% | 2572 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 41,017 psi | 66% | 2700 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 44% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,121 psi | 72% | 2684 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,329 psi | 82% | 2867 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,379 psi | 66% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,534 psi | 55% | 2546 fps | 96.8% |
| ReloadSwiss RS 70 | 60.9 gr | 80% | 33,881 psi | 54% | 2552 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,095 psi | 77% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,785 psi | 67% | 2635 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,545 psi | 79% | 2782 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 92% | 43,105 psi | 69% | 2720 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,204 psi | 63% | 2556 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,261 psi | 61% | 2543 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,880 psi | 83% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,354 psi | 74% | 2687 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,405 psi | 58% | 2516 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,091 psi | 69% | 2690 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,589 psi | 81% | 2779 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,750 psi | 83% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,569 psi | 70% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,318 psi | 60% | 2484 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,699 psi | 68% | 2713 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,474 psi | 83% | 2687 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,308 psi | 68% | 2635 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 50,923 psi | 82% | 2776 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,328 psi | 50% | 2484 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 40,959 psi | 66% | 2648 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,315 psi | 84% | 2674 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,443 psi | 78% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,834 psi | 78% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,350 psi | 65% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,303 psi | 58% | 2536 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 94% | 40,234 psi | 65% | 2621 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,934 psi | 75% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,665 psi | 57% | 2530 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,008 psi | 47% | 2421 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 98% | 50,705 psi | 81% | 2917 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,694 psi | 57% | 2510 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,188 psi | 60% | 2585 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,614 psi | 43% | 2428 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,415 psi | 81% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,265 psi | 69% | 2684 fps | 95.1% |
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 99 powders for .300 Win. Mag. loaded with the .308 | 175gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,041 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 175.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 175gr | Atomic 29 HP 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.