Load Specifications
Bullet:.308 | 150gr | Barnes TAC-X
Bullet Manufacturer:Barnes
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:11.5
Load data in caliber .300 WSM with .308 | 150gr | Barnes TAC-X bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 86% | 55,637 psi | 87% | 2936 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,925 psi | 85% | 2959 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,435 psi | 90% | 3002 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,360 psi | 85% | 3009 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,056 psi | 86% | 2953 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 55,492 psi | 87% | 3018 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3097 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 56,202 psi | 88% | 3051 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 57,145 psi | 90% | 3048 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,259 psi | 87% | 3002 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,738 psi | 87% | 2976 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,912 psi | 88% | 3104 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,738 psi | 87% | 3169 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,029 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,478 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,740 psi | 90% | 3094 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,982 psi | 83% | 3094 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,331 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2805 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,351 psi | 66% | 2966 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,144 psi | 88% | 3064 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 54,302 psi | 85% | 3035 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,534 psi | 85% | 2995 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,927 psi | 89% | 2982 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,913 psi | 89% | 3071 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,245 psi | 87% | 3120 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 54,969 psi | 86% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,172 psi | 86% | 3041 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 96% | 56,521 psi | 89% | 3120 fps | 97.5% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3061 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,739 psi | 89% | 3064 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,240 psi | 77% | 2966 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,868 psi | 86% | 3081 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,622 psi | 87% | 3123 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 55% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,608 psi | 87% | 3031 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,737 psi | 86% | 3022 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,738 psi | 87% | 3018 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,303 psi | 87% | 2982 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 56,420 psi | 88% | 2910 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3015 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,434 psi | 87% | 3018 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,456 psi | 73% | 2927 fps | 98.1% |
| IMR 4895 | <<locked>> | 90% | 55,622 psi | 87% | 3074 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 55,259 psi | 87% | 3002 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,506 psi | 87% | 2986 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,796 psi | 87% | 3025 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,695 psi | 87% | 2976 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 56,449 psi | 88% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,477 psi | 87% | 3018 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3054 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 54,810 psi | 86% | 2992 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,259 psi | 87% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,898 psi | 89% | 3081 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3077 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 57,595 psi | 90% | 3107 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,258 psi | 83% | 3074 fps | 97.7% |
| Ramshot TAC | <<locked>> | 86% | 55,680 psi | 87% | 3018 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,013 psi | 86% | 3035 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,275 psi | 88% | 3002 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 56% | 1903 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,592 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,535 psi | 87% | 3022 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,636 psi | 86% | 3110 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,012 psi | 85% | 3140 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3117 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3143 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 55,956 psi | 88% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,405 psi | 87% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,450 psi | 90% | 3074 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,534 psi | 85% | 2995 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,477 psi | 87% | 3018 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,796 psi | 87% | 3025 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,449 psi | 88% | 3028 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 3038 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,738 psi | 87% | 3084 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,347 psi | 88% | 2969 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,983 psi | 85% | 2992 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,665 psi | 86% | 3022 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,391 psi | 88% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,695 psi | 89% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,246 psi | 88% | 2972 fps | 97.2% |
| Somchem S321 | <<locked>> | 84% | 56,695 psi | 89% | 3038 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,709 psi | 87% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,305 psi | 90% | 3041 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 54,389 psi | 85% | 3022 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,660 psi | 76% | 3028 fps | 100% |
| Unknown powder | <<locked>> | 98% | 55,376 psi | 87% | 3087 fps | 98.8% |
| Vihtavuori N130 | <<locked>> | 84% | 55,143 psi | 86% | 2887 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,912 psi | 88% | 2913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,072 psi | 89% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,969 psi | 86% | 2963 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,304 psi | 88% | 3064 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 54,969 psi | 86% | 3009 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,752 psi | 86% | 2992 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,260 psi | 88% | 3110 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,263 psi | 65% | 2890 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3058 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,376 psi | 88% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,521 psi | 89% | 3120 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,939 psi | 53% | 2785 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,709 psi | 87% | 3048 fps | 100% |
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 2015 | <<locked>> | 80% | 46,137 psi | 72% | 2792 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,575 psi | 79% | 2907 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,276 psi | 60% | 2694 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,077 psi | 69% | 2841 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 51,416 psi | 81% | 2894 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 37,869 psi | 59% | 2707 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 36,390 psi | 57% | 2733 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 43,569 psi | 68% | 2825 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 37,101 psi | 58% | 2664 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,585 psi | 71% | 2835 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 45,687 psi | 72% | 2831 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,069 psi | 82% | 3041 fps | 99.8% |
| Alliant Power Pro 2000-MR | 55.9 gr | 80% | 39,668 psi | 62% | 2848 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,651 psi | 57% | 2687 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,229 psi | 83% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,276 psi | 62% | 2749 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,622 psi | 57% | 2746 fps | 95.3% |
| Alliant Reloder-17 | 55 gr | 80% | 31,618 psi | 50% | 2638 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 33,547 psi | 53% | 2690 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,465 psi | 62% | 2897 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,743 psi | 67% | 2825 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 36,201 psi | 57% | 2690 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 51,198 psi | 80% | 2940 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,384 psi | 74% | 2828 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,323 psi | 68% | 2841 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,921 psi | 75% | 2995 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 48,443 psi | 76% | 2884 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,639 psi | 62% | 2749 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 90% | 45,905 psi | 72% | 2930 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 98% | 52,243 psi | 82% | 3002 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,932 psi | 69% | 2838 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,444 psi | 49% | 2575 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,550 psi | 57% | 2730 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 96% | 51,837 psi | 81% | 3058 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 41% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,072 psi | 60% | 2703 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 39,842 psi | 62% | 2769 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,274 psi | 57% | 2638 fps | 96.1% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,166 psi | 72% | 2818 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 53,156 psi | 83% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 51,256 psi | 80% | 2963 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,907 psi | 77% | 2904 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 36,085 psi | 57% | 2707 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 40,234 psi | 63% | 2785 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 45,585 psi | 71% | 2835 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 51,866 psi | 81% | 2930 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,598 psi | 67% | 2805 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,714 psi | 69% | 2762 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 38,798 psi | 61% | 2707 fps | 98.5% |
| Lovex S065 | <<locked>> | 88% | 40,843 psi | 64% | 2746 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 46,717 psi | 73% | 2887 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,728 psi | 67% | 2779 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 43,004 psi | 67% | 2792 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,667 psi | 61% | 2740 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 36,753 psi | 58% | 2736 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,305 psi | 60% | 2753 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 43,671 psi | 68% | 2890 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,542 psi | 71% | 2835 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,005 psi | 71% | 2858 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,400 psi | 77% | 2887 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 42% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,271 psi | 80% | 2930 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,643 psi | 72% | 2844 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,307 psi | 65% | 2861 fps | 97.4% |
| ReloadSwiss RS 60 | 55 gr | 80% | 33,649 psi | 53% | 2710 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,711 psi | 61% | 2808 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,669 psi | 65% | 2881 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,644 psi | 73% | 2828 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,756 psi | 64% | 2730 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,127 psi | 53% | 2631 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 51,198 psi | 80% | 2940 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,843 psi | 64% | 2746 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,598 psi | 67% | 2805 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,798 psi | 61% | 2707 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 45,469 psi | 71% | 2867 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,099 psi | 55% | 2680 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,982 psi | 83% | 2920 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,990 psi | 69% | 2812 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,235 psi | 66% | 2792 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,150 psi | 69% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,651 psi | 57% | 2592 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,992 psi | 72% | 2802 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,371 psi | 77% | 2920 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 43,743 psi | 69% | 2736 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,511 psi | 68% | 2805 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 34,954 psi | 55% | 2638 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 28,848 psi | 45% | 2562 fps | 95.5% |
| Unknown powder | <<locked>> | 88% | 40,030 psi | 63% | 2799 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,820 psi | 77% | 2792 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,568 psi | 65% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,783 psi | 61% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,147 psi | 63% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 29,820 psi | 47% | 2484 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 86% | 37,434 psi | 59% | 2713 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,051 psi | 75% | 2894 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,798 psi | 62% | 2730 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 37,942 psi | 59% | 2759 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 94% | 33,794 psi | 53% | 2713 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,517 psi | 49% | 2539 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 48,863 psi | 77% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 45,905 psi | 72% | 2930 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,749 psi | 50% | 2710 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,054 psi | 82% | 2989 fps | 99.8% |
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 103 powders for .300 WSM loaded with the .308 | 150gr | Barnes TAC-X. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,169 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 150gr | 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.