Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 168gr | Barnes TAC-X bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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% | 56,246 psi | 88% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,157 psi | 85% | 2897 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2999 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,898 psi | 89% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,592 psi | 86% | 2992 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,143 psi | 86% | 3087 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,348 psi | 90% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,854 psi | 88% | 3045 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3097 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,174 psi | 90% | 3100 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,927 psi | 88% | 3038 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,621 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,781 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,666 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,188 psi | 90% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,172 psi | 86% | 3028 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3094 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,108 psi | 72% | 2940 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,388 psi | 84% | 3100 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 3012 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 55,303 psi | 87% | 2956 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3094 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,766 psi | 86% | 2946 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,593 psi | 87% | 2976 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,956 psi | 89% | 3051 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 56,608 psi | 89% | 3012 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 57,450 psi | 90% | 3038 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,217 psi | 88% | 3022 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,043 psi | 88% | 2979 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,217 psi | 90% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2976 fps | 97% |
| Hodgdon Superformance | <<locked>> | 90% | 57,740 psi | 90% | 3094 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,725 psi | 90% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,637 psi | 89% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,593 psi | 87% | 2936 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,999 psi | 88% | 2982 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,362 psi | 88% | 2972 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 55,085 psi | 86% | 2986 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,202 psi | 88% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,143 psi | 86% | 2969 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3068 fps | 97.2% |
| Lovex S062 | <<locked>> | 84% | 56,681 psi | 89% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,463 psi | 88% | 2966 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,418 psi | 85% | 2959 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2841 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 57,667 psi | 90% | 3005 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,942 psi | 89% | 3035 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 56,246 psi | 88% | 3120 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 57,043 psi | 89% | 3035 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,984 psi | 86% | 2976 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3087 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 55,883 psi | 88% | 3035 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2953 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,651 psi | 87% | 2963 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,579 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,766 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,058 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,281 psi | 71% | 2972 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 55,114 psi | 86% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,390 psi | 87% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,363 psi | 90% | 3012 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 54,317 psi | 85% | 3015 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,766 psi | 86% | 2946 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,463 psi | 88% | 2966 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,681 psi | 89% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,418 psi | 85% | 2959 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,217 psi | 90% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,289 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,289 psi | 88% | 2923 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,667 psi | 90% | 3068 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 55,434 psi | 87% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,666 psi | 87% | 2949 fps | 96.5% |
| Somchem S365 | <<locked>> | 94% | 56,724 psi | 89% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,071 psi | 86% | 2992 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 55,695 psi | 87% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,043 psi | 88% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,753 psi | 89% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,492 psi | 87% | 2976 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2963 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 84% | 57,580 psi | 90% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,665 psi | 86% | 2979 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,666 psi | 87% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,405 psi | 88% | 3110 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,201 psi | 87% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,232 psi | 90% | 3054 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,110 psi | 77% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,187 psi | 86% | 2986 fps | 98.2% |
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% | 52,808 psi | 83% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,836 psi | 80% | 2841 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,592 psi | 54% | 2585 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,111 psi | 79% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,421 psi | 60% | 2694 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 51,271 psi | 80% | 3022 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 47,485 psi | 74% | 2812 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,699 psi | 67% | 2795 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 50,038 psi | 78% | 2972 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,171 psi | 83% | 3041 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,902 psi | 67% | 2799 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,950 psi | 75% | 2835 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,358 psi | 80% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,478 psi | 59% | 2707 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,743 psi | 67% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,438 psi | 67% | 2789 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,801 psi | 67% | 2841 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,296 psi | 43% | 2441 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,156 psi | 52% | 2628 fps | 95.5% |
| Alliant Reloder-26 | 70.9 gr | 82% | 31,386 psi | 49% | 2618 fps | 95.5% |
| Bofors RP15 | <<locked>> | 94% | 42,206 psi | 66% | 2825 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 48,399 psi | 76% | 2848 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,801 psi | 67% | 2841 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,409 psi | 66% | 2713 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,776 psi | 76% | 2861 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,451 psi | 63% | 2743 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,540 psi | 68% | 2769 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 49,937 psi | 78% | 2913 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,562 psi | 82% | 2959 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,998 psi | 55% | 2595 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,374 psi | 84% | 2953 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,293 psi | 66% | 2907 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,610 psi | 62% | 2756 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 43% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,925 psi | 85% | 2920 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,937 psi | 78% | 2848 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,199 psi | 82% | 2881 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 38,029 psi | 60% | 2635 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,918 psi | 69% | 2746 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 36,854 psi | 58% | 2641 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,707 psi | 83% | 2936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,530 psi | 76% | 2851 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 47,718 psi | 75% | 2940 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 49,995 psi | 78% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,321 psi | 65% | 2694 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,537 psi | 62% | 2671 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 33,533 psi | 53% | 2559 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 50,676 psi | 79% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,250 psi | 68% | 2789 fps | 95.3% |
| Norma MRP | 73.9 gr | 88% | 39,247 psi | 62% | 2792 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 38,305 psi | 60% | 2690 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,343 psi | 80% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,601 psi | 75% | 2949 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,202 psi | 58% | 2677 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 39,291 psi | 62% | 2746 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,617 psi | 76% | 2841 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,440 psi | 71% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,247 psi | 60% | 2710 fps | 98.1% |
| ReloadSwiss RS 70 | 68.6 gr | 80% | 37,217 psi | 58% | 2720 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,044 psi | 61% | 2818 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 51,880 psi | 81% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,498 psi | 71% | 2792 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,311 psi | 74% | 2838 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,553 psi | 65% | 2769 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,409 psi | 66% | 2713 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,321 psi | 65% | 2694 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,995 psi | 78% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,537 psi | 62% | 2671 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,920 psi | 74% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,775 psi | 73% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,379 psi | 63% | 2635 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,176 psi | 65% | 2766 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 45,774 psi | 72% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,837 psi | 81% | 2884 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,679 psi | 54% | 2641 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,262 psi | 62% | 2690 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 52,315 psi | 82% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,518 psi | 82% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,772 psi | 69% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,755 psi | 62% | 2690 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 41,510 psi | 65% | 2730 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,763 psi | 80% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,160 psi | 61% | 2690 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,168 psi | 47% | 2520 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 94% | 48,878 psi | 77% | 2976 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,928 psi | 61% | 2661 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,640 psi | 64% | 2746 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,643 psi | 40% | 2464 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,626 psi | 65% | 2740 fps | 95% |
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 90 powders for .300 Weath. Mag. loaded with the .308 | 168gr | Barnes TAC-X. Norma MRP delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,120 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:12.0 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .308 | 168gr | Barnes TAC-X 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.