Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 170gr | Speer Hot-Cor bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Ramshot Grand and Norma MRP.
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>> | 82% | 55,361 psi | 89% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,317 psi | 87% | 2838 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,418 psi | 87% | 2923 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,840 psi | 90% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,939 psi | 85% | 2923 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,593 psi | 89% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,867 psi | 86% | 2963 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 3012 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,114 psi | 88% | 3025 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,098 psi | 85% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,200 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,737 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,824 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,287 psi | 85% | 2949 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 3009 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 2940 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,469 psi | 71% | 2861 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,766 psi | 88% | 3081 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,588 psi | 80% | 2930 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 53,795 psi | 86% | 2887 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 3009 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 53,287 psi | 85% | 2871 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 54,215 psi | 87% | 2904 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 56,405 psi | 90% | 2992 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 53,258 psi | 85% | 2904 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,157 psi | 87% | 2940 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,012 psi | 87% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,724 psi | 89% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,143 psi | 88% | 3009 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 59% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,332 psi | 89% | 2894 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,636 psi | 88% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,737 psi | 88% | 2877 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,519 psi | 86% | 2851 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 54,302 psi | 87% | 2904 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,056 psi | 88% | 2900 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 54,244 psi | 87% | 2927 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,621 psi | 88% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,447 psi | 86% | 2890 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 98% | 52,968 psi | 85% | 2989 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 55,347 psi | 89% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,071 psi | 88% | 2897 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 56,347 psi | 90% | 2940 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,179 psi | 72% | 2772 fps | 98.3% |
| Norma 203B | <<locked>> | 84% | 55,970 psi | 90% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,940 psi | 88% | 2956 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 53,635 psi | 86% | 3035 fps | 99% |
| Norma URP | <<locked>> | 92% | 55,129 psi | 88% | 2959 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,316 psi | 85% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,605 psi | 84% | 2992 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 53,867 psi | 86% | 2956 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2972 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 60% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,201 psi | 87% | 2887 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,259 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,707 psi | 85% | 2943 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,897 psi | 88% | 3028 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,395 psi | 70% | 2877 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 82% | 53,925 psi | 86% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,882 psi | 86% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,405 psi | 89% | 2933 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 98% | 55,941 psi | 90% | 2992 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 53,287 psi | 85% | 2871 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,071 psi | 88% | 2897 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 55,347 psi | 89% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,347 psi | 90% | 2940 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,622 psi | 89% | 2946 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,333 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,911 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,752 psi | 88% | 2848 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,492 psi | 89% | 2986 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 53,867 psi | 86% | 2877 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,520 psi | 87% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,185 psi | 85% | 2913 fps | 98.5% |
| Unknown powder | <<locked>> | 90% | 55,840 psi | 90% | 2966 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 54,201 psi | 87% | 2749 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 54,360 psi | 87% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,708 psi | 86% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,434 psi | 89% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,304 psi | 90% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,560 psi | 81% | 2858 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 82% | 53,461 psi | 86% | 2831 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 53,098 psi | 85% | 2927 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 53,490 psi | 86% | 2966 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,259 psi | 87% | 3031 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,214 psi | 85% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,405 psi | 90% | 2992 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,093 psi | 74% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,926 psi | 88% | 2933 fps | 97.9% |
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 2495 | <<locked>> | 80% | 51,822 psi | 83% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,469 psi | 71% | 2664 fps | 96.5% |
| Accurate 3100 | <<locked>> | 88% | 36,056 psi | 58% | 2579 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 49,081 psi | 79% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,420 psi | 60% | 2628 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 46,383 psi | 74% | 2743 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,251 psi | 71% | 2782 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 48,298 psi | 77% | 2887 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,343 psi | 82% | 2963 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,731 psi | 75% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,937 psi | 80% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,550 psi | 59% | 2641 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,408 psi | 66% | 2769 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,947 psi | 70% | 2776 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,106 psi | 71% | 2825 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,760 psi | 43% | 2385 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,476 psi | 55% | 2621 fps | 95.7% |
| Alliant Reloder-26 | 68 gr | 84% | 32,851 psi | 53% | 2621 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 43,497 psi | 70% | 2812 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,224 psi | 76% | 2779 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,106 psi | 71% | 2825 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 41,466 psi | 66% | 2644 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 47,442 psi | 76% | 2789 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 42,801 psi | 69% | 2749 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 82% | 41,481 psi | 67% | 2680 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,676 psi | 81% | 2877 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,084 psi | 55% | 2533 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,820 psi | 78% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 38,377 psi | 62% | 2684 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 44% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,936 psi | 78% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,329 psi | 82% | 2815 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,542 psi | 73% | 2720 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,715 psi | 72% | 2690 fps | 97.3% |
| IMR 4350 | <<locked>> | 82% | 39,610 psi | 64% | 2628 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,888 psi | 69% | 2677 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 32,735 psi | 52% | 2500 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 51,242 psi | 82% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,183 psi | 80% | 2835 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 49,356 psi | 79% | 2920 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 48,950 psi | 78% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,422 psi | 65% | 2628 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 38,711 psi | 62% | 2608 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 34,925 psi | 56% | 2552 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 49,313 psi | 79% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,918 psi | 72% | 2776 fps | 95.5% |
| Norma MRP | 69.1 gr | 88% | 37,840 psi | 61% | 2713 fps | 95% |
| Norma URP | <<locked>> | 80% | 37,289 psi | 60% | 2625 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,777 psi | 80% | 2848 fps | 100% |
| Ramshot Grand | 76.1 gr | 94% | 48,660 psi | 78% | 2920 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 36,129 psi | 58% | 2608 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 94% | 42,351 psi | 68% | 2772 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,413 psi | 76% | 2772 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,005 psi | 71% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,173 psi | 60% | 2644 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,216 psi | 58% | 2651 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,466 psi | 65% | 2808 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 50,807 psi | 81% | 2789 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,483 psi | 71% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,907 psi | 78% | 2818 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 42,830 psi | 69% | 2756 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,466 psi | 66% | 2644 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,422 psi | 65% | 2628 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 48,950 psi | 78% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,711 psi | 62% | 2608 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,556 psi | 73% | 2779 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,953 psi | 85% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,774 psi | 73% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,653 psi | 64% | 2572 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,438 psi | 68% | 2749 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 44,686 psi | 72% | 2723 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 33,707 psi | 54% | 2579 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,901 psi | 66% | 2684 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 40,089 psi | 64% | 2680 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 80% | 51,039 psi | 82% | 2703 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,097 psi | 82% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,401 psi | 81% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,319 psi | 61% | 2569 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 40,306 psi | 65% | 2654 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 94% | 41,495 psi | 67% | 2687 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,241 psi | 81% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,756 psi | 65% | 2697 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 29,385 psi | 47% | 2461 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 98% | 50,821 psi | 81% | 2969 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,782 psi | 61% | 2595 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 42,801 psi | 69% | 2749 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,963 psi | 43% | 2474 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,150 psi | 71% | 2746 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 89 powders for .300 Win. Mag. loaded with the .308 | 170gr | Speer Hot-Cor. Alliant Reloder-26 delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,081 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:14.5 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. Alliant Reloder-26, Ramshot Grand, Norma MRP rank at the top here: for .300 Win. Mag. with the .308 | 170gr | Speer Hot-Cor 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.