Load Specifications
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:1:15.0
Load data in caliber .300 WSM with .308 | 150gr | Barnes TSX FN FB bullet and 100 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, Hodgdon Superformance 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>> | 84% | 54,868 psi | 86% | 2940 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,695 psi | 89% | 3015 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,913 psi | 89% | 3009 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,580 psi | 90% | 3071 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,215 psi | 85% | 2963 fps | 96.4% |
| Accurate 4064 | <<locked>> | 92% | 56,811 psi | 89% | 3054 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3146 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 57,580 psi | 90% | 3094 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,201 psi | 87% | 3041 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,768 psi | 89% | 3048 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,522 psi | 90% | 3018 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,954 psi | 85% | 3163 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,332 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,738 psi | 87% | 3087 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3153 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,478 psi | 89% | 3192 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2854 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,947 psi | 69% | 3025 fps | 97.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,128 psi | 85% | 3054 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 55,840 psi | 88% | 3077 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,883 psi | 88% | 3045 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,853 psi | 86% | 2976 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,101 psi | 88% | 3074 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,462 psi | 85% | 3123 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 56,637 psi | 89% | 3031 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,000 psi | 89% | 3094 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 54,607 psi | 86% | 3110 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 98% | 55,303 psi | 87% | 3074 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 54,766 psi | 86% | 3054 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,227 psi | 80% | 3018 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,418 psi | 85% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,867 psi | 84% | 3120 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 55% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,911 psi | 86% | 3038 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,652 psi | 89% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,377 psi | 90% | 3064 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,695 psi | 89% | 3035 fps | 97.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3071 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,476 psi | 85% | 3025 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 2976 fps | 98.6% |
| IMR 4895 | <<locked>> | 90% | 57,174 psi | 90% | 3120 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,768 psi | 89% | 3048 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,695 psi | 89% | 3025 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,580 psi | 90% | 3071 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,174 psi | 90% | 3022 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,331 psi | 85% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,305 psi | 90% | 3071 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 54,694 psi | 86% | 3051 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 56,101 psi | 88% | 3038 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,014 psi | 89% | 3041 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,911 psi | 86% | 3071 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3130 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3136 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 55,912 psi | 88% | 3100 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3130 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 57,130 psi | 90% | 3064 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,739 psi | 89% | 3084 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,696 psi | 90% | 3048 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 56% | 1929 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,999 psi | 88% | 3025 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,479 psi | 90% | 3077 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,449 psi | 88% | 3159 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,333 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3169 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3205 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 56,811 psi | 89% | 3015 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,681 psi | 89% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,695 psi | 87% | 3071 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,883 psi | 88% | 3045 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,305 psi | 90% | 3071 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,580 psi | 90% | 3071 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,331 psi | 85% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,650 psi | 86% | 3051 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,172 psi | 85% | 3081 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,506 psi | 87% | 3041 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,144 psi | 88% | 3064 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,244 psi | 85% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,853 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,128 psi | 85% | 2966 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 54,259 psi | 85% | 3022 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,014 psi | 89% | 2969 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,187 psi | 86% | 3031 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,043 psi | 88% | 3068 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,589 psi | 79% | 3077 fps | 100% |
| Unknown powder | <<locked>> | 98% | 57,464 psi | 90% | 3143 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 56,231 psi | 88% | 2923 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,450 psi | 90% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,536 psi | 89% | 2999 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,637 psi | 89% | 3005 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,375 psi | 85% | 3058 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 56,333 psi | 88% | 3051 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,420 psi | 88% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,679 psi | 86% | 3107 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,888 psi | 67% | 2940 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,956 psi | 88% | 3054 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,099 psi | 85% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,607 psi | 86% | 3110 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,940 psi | 55% | 2844 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,667 psi | 90% | 3097 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% | 48,211 psi | 76% | 2838 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,069 psi | 83% | 2959 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,480 psi | 63% | 2746 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,528 psi | 73% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 50,560 psi | 79% | 2897 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 38,319 psi | 60% | 2736 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 34,867 psi | 55% | 2713 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 44,527 psi | 70% | 2867 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 37,869 psi | 59% | 2703 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,659 psi | 73% | 2881 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 46,992 psi | 74% | 2867 fps | 100% |
| Alliant Power Pro 2000-MR | 58.7 gr | 80% | 40,596 psi | 64% | 2894 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,376 psi | 59% | 2723 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,190 psi | 63% | 2792 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,157 psi | 55% | 2730 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,271 psi | 51% | 2677 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,285 psi | 51% | 2677 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,869 psi | 59% | 2881 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,947 psi | 69% | 2867 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 36,898 psi | 58% | 2723 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 49,197 psi | 77% | 2927 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,501 psi | 76% | 2871 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,542 psi | 71% | 2897 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,647 psi | 79% | 3054 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 49,676 psi | 78% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,840 psi | 59% | 2730 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 88% | 44,135 psi | 69% | 2917 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 51,808 psi | 81% | 3012 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 44,933 psi | 70% | 2877 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,126 psi | 50% | 2618 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,595 psi | 60% | 2792 fps | 98.5% |
| Hodgdon Superformance | 70.3 gr | 92% | 46,412 psi | 73% | 2979 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 41% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,972 psi | 63% | 2759 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,828 psi | 64% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,101 psi | 58% | 2680 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,614 psi | 70% | 2815 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 49,676 psi | 78% | 2959 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,121 psi | 71% | 2851 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 34,679 psi | 54% | 2690 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,220 psi | 65% | 2825 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 46,659 psi | 73% | 2881 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 52,823 psi | 83% | 2969 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,656 psi | 68% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,585 psi | 70% | 2805 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 39,508 psi | 62% | 2743 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 41,771 psi | 65% | 2789 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 45,107 psi | 71% | 2877 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,439 psi | 68% | 2815 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 43,874 psi | 69% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,552 psi | 62% | 2782 fps | 97.9% |
| Norma 204 | <<locked>> | 98% | 53,476 psi | 84% | 3061 fps | 95.2% |
| Norma URP | <<locked>> | 86% | 35,215 psi | 55% | 2717 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 39,262 psi | 62% | 2792 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 42,264 psi | 66% | 2884 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,659 psi | 73% | 2881 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,238 psi | 72% | 2904 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,386 psi | 79% | 2930 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 41% | 1722 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,431 psi | 82% | 2969 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,874 psi | 69% | 2835 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,496 psi | 67% | 2904 fps | 98% |
| ReloadSwiss RS 60 | 57.8 gr | 80% | 34,389 psi | 54% | 2756 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,202 psi | 58% | 2792 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,219 psi | 63% | 2871 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 47,369 psi | 74% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,452 psi | 65% | 2766 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 34,635 psi | 54% | 2664 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 49,197 psi | 77% | 2927 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,771 psi | 65% | 2789 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,656 psi | 68% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,508 psi | 62% | 2743 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 45,049 psi | 71% | 2874 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,853 psi | 56% | 2720 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,846 psi | 70% | 2851 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,105 psi | 68% | 2835 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,918 psi | 70% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,304 psi | 58% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,382 psi | 70% | 2795 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 50,647 psi | 79% | 2963 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,469 psi | 70% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,715 psi | 70% | 2851 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 35,578 psi | 56% | 2674 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 27,456 psi | 43% | 2536 fps | 95.2% |
| Unknown powder | <<locked>> | 86% | 38,537 psi | 60% | 2785 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,748 psi | 78% | 2828 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,496 psi | 67% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,756 psi | 64% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,162 psi | 65% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,269 psi | 47% | 2516 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 84% | 36,042 psi | 56% | 2700 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 49,226 psi | 77% | 2936 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,654 psi | 64% | 2766 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 36,376 psi | 57% | 2740 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 34,824 psi | 55% | 2759 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,052 psi | 47% | 2520 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 50,343 psi | 79% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,135 psi | 69% | 2917 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,472 psi | 48% | 2694 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,476 psi | 84% | 3031 fps | 99.9% |
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 100 powders for .300 WSM loaded with the .308 | 150gr | Barnes TSX FN FB. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,205 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.0 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, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 150gr | Barnes TSX FN FB 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.