Load Specifications
Bullet:.308 | 150gr | Barnes MRX BT
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 MRX BT bullet and 106 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, ReloadSwiss RS 60 and Alliant Reloder-17.
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% | 55,201 psi | 87% | 2930 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,479 psi | 90% | 3005 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,985 psi | 89% | 2995 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,012 psi | 85% | 3002 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,012 psi | 85% | 3002 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,549 psi | 85% | 2940 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 55,143 psi | 86% | 3009 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3084 fps | 99.2% |
| Accurate LT-30 | <<locked>> | 82% | 57,740 psi | 90% | 2920 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 55,869 psi | 88% | 3041 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 56,797 psi | 89% | 3038 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,897 psi | 86% | 2995 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,303 psi | 87% | 2969 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,506 psi | 87% | 3094 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,492 psi | 87% | 3163 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,739 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,347 psi | 88% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,377 psi | 90% | 3087 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3087 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,725 psi | 90% | 3189 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2799 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,930 psi | 66% | 2956 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,550 psi | 87% | 3054 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 57,290 psi | 90% | 3077 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,551 psi | 90% | 3041 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,565 psi | 89% | 2976 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,594 psi | 89% | 3064 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,882 psi | 86% | 3110 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 54,810 psi | 86% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,926 psi | 86% | 3035 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 96% | 55,941 psi | 88% | 3107 fps | 97.3% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3051 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 56,405 psi | 88% | 3054 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2959 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,505 psi | 85% | 3074 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,187 psi | 86% | 3114 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 55% | 1854 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,274 psi | 87% | 3025 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,592 psi | 86% | 3015 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,390 psi | 87% | 3009 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,042 psi | 86% | 2976 fps | 97% |
| IMR 4198 | <<locked>> | 82% | 56,231 psi | 88% | 2904 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3005 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,926 psi | 86% | 3009 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,919 psi | 72% | 2917 fps | 97.9% |
| IMR 4895 | <<locked>> | 90% | 55,259 psi | 87% | 3064 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 54,897 psi | 86% | 2995 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,172 psi | 86% | 2979 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,434 psi | 87% | 3018 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,361 psi | 87% | 2966 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 55,840 psi | 88% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,216 psi | 87% | 3012 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 3045 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 54,447 psi | 85% | 2986 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,897 psi | 86% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,521 psi | 89% | 3074 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3071 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 57,276 psi | 90% | 3097 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,750 psi | 83% | 3061 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 55,361 psi | 87% | 3009 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,723 psi | 86% | 3028 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,985 psi | 88% | 2995 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,795 psi | 56% | 1903 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,244 psi | 85% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,288 psi | 87% | 3015 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,911 psi | 84% | 3094 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,334 psi | 90% | 3189 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3107 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3133 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 55,564 psi | 87% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,056 psi | 86% | 2986 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,130 psi | 90% | 3068 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,551 psi | 90% | 3041 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,216 psi | 87% | 3012 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,434 psi | 87% | 3018 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,840 psi | 88% | 3015 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3031 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,450 psi | 90% | 2995 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,419 psi | 87% | 3077 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,144 psi | 88% | 2963 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,246 psi | 90% | 3038 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,114 psi | 85% | 3009 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,304 psi | 88% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,376 psi | 88% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,724 psi | 87% | 2963 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 56,072 psi | 88% | 3025 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,361 psi | 87% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,782 psi | 89% | 3031 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 57,377 psi | 90% | 3064 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 3015 fps | 100% |
| Unknown powder | <<locked>> | 98% | 55,071 psi | 86% | 3081 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 84% | 54,723 psi | 86% | 2877 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,579 psi | 87% | 2907 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,637 psi | 89% | 2986 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,621 psi | 86% | 2956 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2992 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,695 psi | 87% | 3051 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 54,578 psi | 86% | 3002 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,433 psi | 85% | 2986 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,956 psi | 88% | 3104 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,712 psi | 64% | 2877 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3048 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,767 psi | 87% | 3051 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,941 psi | 88% | 3107 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,605 psi | 53% | 2769 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,405 psi | 87% | 3038 fps | 99.9% |
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 2015 | <<locked>> | 80% | 45,759 psi | 72% | 2782 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,183 psi | 79% | 2900 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,840 psi | 59% | 2684 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,700 psi | 68% | 2831 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 43,700 psi | 68% | 2831 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 51,155 psi | 80% | 2884 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 37,463 psi | 59% | 2697 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 36,085 psi | 57% | 2723 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 54,157 psi | 85% | 2871 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 43,424 psi | 68% | 2818 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,782 psi | 58% | 2654 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,440 psi | 71% | 2831 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 45,469 psi | 71% | 2825 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,880 psi | 81% | 3035 fps | 99.8% |
| Alliant Power Pro 2000-MR | 55.5 gr | 80% | 39,378 psi | 62% | 2838 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,332 psi | 57% | 2677 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,794 psi | 83% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,146 psi | 61% | 2746 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,361 psi | 57% | 2736 fps | 95.1% |
| Alliant Reloder-17 | 56 gr | 82% | 33,576 psi | 53% | 2690 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 33,185 psi | 52% | 2680 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,073 psi | 61% | 2884 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,438 psi | 67% | 2815 fps | 97.2% |
| Bofors RP3 | <<locked>> | 80% | 35,853 psi | 56% | 2677 fps | 97.5% |
| Bofors RP7 | <<locked>> | 94% | 50,691 psi | 79% | 2927 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,239 psi | 74% | 2822 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,989 psi | 67% | 2835 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,558 psi | 75% | 2982 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 48,051 psi | 75% | 2874 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,320 psi | 62% | 2740 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 92% | 48,631 psi | 76% | 2982 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 98% | 51,953 psi | 81% | 2992 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,787 psi | 69% | 2831 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,183 psi | 49% | 2569 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,201 psi | 57% | 2720 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 96% | 51,401 psi | 81% | 3048 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 41% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,942 psi | 59% | 2697 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 39,639 psi | 62% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,129 psi | 57% | 2635 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,820 psi | 77% | 2867 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,939 psi | 83% | 2858 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 50,778 psi | 80% | 2949 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,646 psi | 76% | 2897 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 38,043 psi | 60% | 2753 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,089 psi | 63% | 2779 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 45,440 psi | 71% | 2831 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 51,503 psi | 81% | 2923 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,438 psi | 67% | 2799 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 43,569 psi | 68% | 2756 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 38,653 psi | 61% | 2703 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 43,192 psi | 68% | 2795 fps | 95.7% |
| Lovex S070 | <<locked>> | 94% | 46,412 psi | 73% | 2877 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,380 psi | 66% | 2769 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 42,656 psi | 67% | 2782 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,537 psi | 60% | 2733 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 36,477 psi | 57% | 2726 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,000 psi | 60% | 2743 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 43,381 psi | 68% | 2884 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 45,237 psi | 71% | 2828 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,686 psi | 70% | 2851 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,081 psi | 77% | 2881 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 42% | 1699 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,908 psi | 80% | 2920 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,382 psi | 71% | 2838 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,915 psi | 64% | 2851 fps | 97.3% |
| ReloadSwiss RS 60 | 54.6 gr | 80% | 33,373 psi | 52% | 2700 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,435 psi | 60% | 2802 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,452 psi | 65% | 2871 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 46,456 psi | 73% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,408 psi | 63% | 2720 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,779 psi | 53% | 2618 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 50,691 psi | 79% | 2927 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,192 psi | 68% | 2795 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,438 psi | 67% | 2799 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 38,653 psi | 61% | 2703 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 45,165 psi | 71% | 2858 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,867 psi | 84% | 2940 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,838 psi | 55% | 2671 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,533 psi | 82% | 2910 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,671 psi | 68% | 2802 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,916 psi | 66% | 2785 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,743 psi | 69% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,318 psi | 57% | 2585 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,878 psi | 77% | 2851 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 49,037 psi | 77% | 2913 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 43,381 psi | 68% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,192 psi | 68% | 2799 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 34,635 psi | 54% | 2628 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 28,616 psi | 45% | 2552 fps | 95.3% |
| Unknown powder | <<locked>> | 88% | 39,682 psi | 62% | 2789 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,617 psi | 76% | 2785 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,408 psi | 65% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,406 psi | 60% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,784 psi | 62% | 2703 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,530 psi | 46% | 2477 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 86% | 37,159 psi | 58% | 2703 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 47,645 psi | 75% | 2884 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 39,479 psi | 62% | 2720 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 37,666 psi | 59% | 2749 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 35,781 psi | 56% | 2762 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,328 psi | 49% | 2533 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 48,501 psi | 76% | 2933 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 48,631 psi | 76% | 2982 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,589 psi | 50% | 2700 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,488 psi | 81% | 2976 fps | 99.7% |
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 117 powders for .300 WSM loaded with the .308 | 150gr | Barnes MRX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,189 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 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 3100, Accurate 4350, ADI AR 2209 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 150gr | Barnes MRX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.