Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 159gr | IBEX TRD bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 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.
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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% | 55,201 psi | 89% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,129 psi | 88% | 2910 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,663 psi | 84% | 2953 fps | 98.7% |
| Accurate 4064 | <<locked>> | 84% | 55,259 psi | 89% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,810 psi | 88% | 3012 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 54,201 psi | 87% | 2940 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,216 psi | 89% | 3038 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,420 psi | 90% | 3114 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,100 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,172 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,752 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,898 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,302 psi | 87% | 3025 fps | 96.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 3025 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,091 psi | 69% | 2881 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,724 psi | 89% | 3166 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,202 psi | 90% | 2999 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 56,289 psi | 90% | 2989 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 3025 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 55,405 psi | 89% | 2956 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 56,304 psi | 90% | 2995 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 56,333 psi | 90% | 3054 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,318 psi | 90% | 3012 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,027 psi | 88% | 2986 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,490 psi | 86% | 2979 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,663 psi | 84% | 3025 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,462 psi | 87% | 2943 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,751 psi | 86% | 2920 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,144 psi | 90% | 2946 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 55,724 psi | 89% | 2982 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,374 psi | 86% | 2927 fps | 98% |
| IMR 4831 | <<locked>> | 94% | 54,940 psi | 88% | 3002 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 53,345 psi | 86% | 2963 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,288 psi | 89% | 2907 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,288 psi | 87% | 2920 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,896 psi | 86% | 2933 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 54,911 psi | 88% | 2969 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,367 psi | 71% | 2808 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 55,767 psi | 89% | 2933 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,985 psi | 90% | 2930 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,534 psi | 87% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,420 psi | 90% | 3035 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 54,592 psi | 88% | 3110 fps | 98.4% |
| Norma URP | <<locked>> | 92% | 53,200 psi | 85% | 2992 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 84% | 54,897 psi | 88% | 2992 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,274 psi | 89% | 3041 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,159 psi | 90% | 2972 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,840 psi | 90% | 3054 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,477 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,172 psi | 87% | 3031 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,202 psi | 90% | 3110 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 82% | 53,287 psi | 85% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,101 psi | 90% | 2979 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 53,635 psi | 86% | 3012 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 90% | 55,405 psi | 89% | 2956 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,896 psi | 86% | 2933 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 54,288 psi | 87% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,911 psi | 88% | 2969 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,577 psi | 86% | 2979 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,810 psi | 88% | 2953 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,217 psi | 90% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,577 psi | 86% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,432 psi | 86% | 2877 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,185 psi | 85% | 3005 fps | 96.8% |
| Somchem S335 | <<locked>> | 82% | 56,072 psi | 90% | 2861 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,159 psi | 90% | 2976 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,405 psi | 89% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,607 psi | 88% | 2992 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 82% | 53,185 psi | 85% | 2848 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,316 psi | 85% | 2861 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,679 psi | 86% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,216 psi | 89% | 2986 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2904 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 84% | 54,868 psi | 88% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,650 psi | 88% | 2995 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 3058 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,781 psi | 88% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,084 psi | 85% | 2999 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,382 psi | 71% | 3018 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,969 psi | 88% | 2963 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2976 fps | 96.7% |
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% | 51,982 psi | 83% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,646 psi | 78% | 2799 fps | 96.4% |
| Accurate 3100 | <<locked>> | 90% | 38,363 psi | 62% | 2680 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 49,153 psi | 79% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,391 psi | 60% | 2677 fps | 97% |
| ADI AR 2208 | <<locked>> | 80% | 45,440 psi | 73% | 2779 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 48,733 psi | 78% | 2920 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,327 psi | 79% | 2992 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,919 psi | 74% | 2812 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,037 psi | 79% | 2881 fps | 99.6% |
| Alliant Reloder-16 | 56.2 gr | 80% | 36,056 psi | 58% | 2674 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,379 psi | 65% | 2805 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,225 psi | 77% | 2913 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,515 psi | 78% | 2966 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,776 psi | 46% | 2487 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,143 psi | 58% | 2703 fps | 95% |
| Alliant Reloder-26 | 66.6 gr | 86% | 34,766 psi | 56% | 2717 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,895 psi | 85% | 2946 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 46,630 psi | 75% | 2828 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 48,515 psi | 78% | 2966 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 43,671 psi | 70% | 2736 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 46,688 psi | 75% | 2828 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 41,075 psi | 66% | 2766 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 46,891 psi | 75% | 2841 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,736 psi | 54% | 2572 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,212 psi | 81% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,960 psi | 69% | 2835 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 44% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,343 psi | 82% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,718 psi | 77% | 2815 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,777 psi | 80% | 2838 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 43,990 psi | 71% | 2766 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,177 psi | 68% | 2710 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 35,810 psi | 57% | 2625 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 50,299 psi | 81% | 2910 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 52,156 psi | 84% | 2858 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,327 psi | 77% | 2822 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,234 psi | 65% | 2667 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 40,944 psi | 66% | 2703 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 37,057 psi | 59% | 2651 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,576 psi | 84% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,779 psi | 85% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,443 psi | 78% | 2867 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 49,530 psi | 79% | 2913 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 42,163 psi | 68% | 2864 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,680 psi | 59% | 2661 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 48,240 psi | 77% | 2881 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 37,869 psi | 61% | 2697 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,630 psi | 75% | 2805 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,228 psi | 84% | 2992 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,714 psi | 68% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,593 psi | 59% | 2684 fps | 96.4% |
| ReloadSwiss RS 70 | 61.4 gr | 80% | 35,650 psi | 57% | 2677 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 50,227 psi | 81% | 2835 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,961 psi | 70% | 2772 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 94% | 47,166 psi | 76% | 2894 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 43,671 psi | 70% | 2736 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,234 psi | 65% | 2667 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 48,327 psi | 77% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,944 psi | 66% | 2703 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,324 psi | 71% | 2815 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,503 psi | 83% | 2900 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,910 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,831 psi | 72% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,829 psi | 67% | 2661 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,731 psi | 75% | 2890 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,924 psi | 85% | 2815 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,237 psi | 71% | 2769 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 33,344 psi | 53% | 2621 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 42,728 psi | 69% | 2772 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 50,038 psi | 80% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,009 psi | 80% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,076 psi | 67% | 2697 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 38,087 psi | 61% | 2664 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 44,367 psi | 71% | 2792 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,530 psi | 78% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,695 psi | 60% | 2664 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 31,444 psi | 50% | 2569 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,304 psi | 60% | 2631 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 41,263 psi | 66% | 2769 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 29,022 psi | 47% | 2575 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,634 psi | 83% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,776 psi | 77% | 2864 fps | 95.2% |
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 84 powders for .300 Win. Mag. loaded with the .308 | 159gr | IBEX TRD. Alliant Reloder-26 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,166 fps. Accurate 3100 gives the best case fill at 100 %, and 84 of the 84 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 159.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 159gr | IBEX TRD 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.