Load Specifications
Bullet:.308 | 140gr | Barnes MPG
Bullet Manufacturer:Barnes
Bullet Weight:140 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:1:10.5
Load data in caliber .300 WSM with .308 | 140gr | Barnes MPG bullet and 101 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 ReloadSwiss RS 52.
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>> | 88% | 56,985 psi | 89% | 3041 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,564 psi | 87% | 3068 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,911 psi | 86% | 3054 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,535 psi | 87% | 3110 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,766 psi | 86% | 3100 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 3104 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 55,883 psi | 88% | 2979 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,275 psi | 88% | 3009 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,941 psi | 88% | 3133 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 57,043 psi | 89% | 3130 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 57,188 psi | 90% | 3110 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,042 psi | 86% | 3084 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 55,376 psi | 87% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,637 psi | 89% | 3202 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,680 psi | 87% | 3251 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,608 psi | 89% | 3153 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,536 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,363 psi | 90% | 3176 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,385 psi | 77% | 3107 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3278 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,361 psi | 87% | 2972 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,811 psi | 87% | 3143 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 57,406 psi | 90% | 3173 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,174 psi | 90% | 3074 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,230 psi | 85% | 3114 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,028 psi | 88% | 3215 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 54,955 psi | 86% | 3077 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,594 psi | 89% | 3110 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,868 psi | 86% | 3120 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 98% | 55,738 psi | 87% | 3189 fps | 96.4% |
| Hodgdon H4198 | <<locked>> | 82% | 57,595 psi | 90% | 3031 fps | 100% |
| Hodgdon H4895 | <<locked>> | 90% | 56,434 psi | 88% | 3146 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,571 psi | 71% | 2979 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,448 psi | 87% | 3176 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,853 psi | 55% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,507 psi | 89% | 3130 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 57,551 psi | 90% | 3159 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,550 psi | 87% | 3097 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,361 psi | 87% | 3061 fps | 96.1% |
| IMR 4198 | <<locked>> | 84% | 56,666 psi | 89% | 3009 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,159 psi | 88% | 3104 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,511 psi | 67% | 2930 fps | 96.3% |
| IMR 4895 | <<locked>> | 92% | 55,172 psi | 86% | 3153 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 55,042 psi | 86% | 3084 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,376 psi | 87% | 3074 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,535 psi | 87% | 3110 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,767 psi | 87% | 3058 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 55,883 psi | 88% | 3107 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 3097 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 3071 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 54,795 psi | 86% | 3081 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 55,187 psi | 86% | 3087 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,507 psi | 89% | 3163 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 50,140 psi | 79% | 3094 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 94% | 57,101 psi | 89% | 3186 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 55,782 psi | 87% | 3100 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,998 psi | 86% | 3120 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,463 psi | 88% | 3091 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 55% | 1952 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,679 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,347 psi | 87% | 3097 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,638 psi | 90% | 3245 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,479 psi | 90% | 3284 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,053 psi | 78% | 3117 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 3146 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,680 psi | 87% | 3068 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,158 psi | 86% | 3074 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 56,956 psi | 89% | 3156 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,259 psi | 87% | 3097 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,535 psi | 87% | 3110 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,883 psi | 88% | 3107 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 3071 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,418 psi | 85% | 3035 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,595 psi | 90% | 3120 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,216 psi | 87% | 3163 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,421 psi | 90% | 3074 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,595 psi | 90% | 3130 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,404 psi | 85% | 3100 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,666 psi | 89% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,405 psi | 88% | 3015 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3045 fps | 96.2% |
| Somchem S321 | <<locked>> | 86% | 56,681 psi | 89% | 3127 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,840 psi | 88% | 3022 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,072 psi | 89% | 3123 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 57,334 psi | 90% | 3153 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,556 psi | 70% | 3035 fps | 99.4% |
| Unknown powderᴾ | <<locked>> | 100% | 54,882 psi | 86% | 3166 fps | 98.1% |
| Vihtavuori N120 | <<locked>> | 82% | 57,276 psi | 90% | 2936 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 55,085 psi | 86% | 2976 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,811 psi | 87% | 3002 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,447 psi | 85% | 3045 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,650 psi | 86% | 3048 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 3025 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3136 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 54,752 psi | 86% | 3094 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 54,708 psi | 86% | 3081 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3186 fps | 98.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,824 psi | 84% | 3081 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 56,144 psi | 88% | 3150 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,738 psi | 87% | 3189 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,927 psi | 88% | 3136 fps | 99.8% |
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% | 44,251 psi | 69% | 2841 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,312 psi | 76% | 2949 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,825 psi | 58% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,134 psi | 66% | 2881 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 34,824 psi | 55% | 2720 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 40,901 psi | 64% | 2913 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,692 psi | 83% | 2933 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,084 psi | 83% | 2959 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,857 psi | 64% | 2848 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 39,421 psi | 62% | 2795 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 80% | 53,563 psi | 84% | 3058 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,859 psi | 67% | 2864 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 42,308 psi | 66% | 2867 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,821 psi | 78% | 3084 fps | 99.2% |
| Alliant Power Pro 2000-MR | 56.3 gr | 82% | 39,436 psi | 62% | 2910 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,924 psi | 53% | 2697 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,082 psi | 78% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,651 psi | 57% | 2766 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,988 psi | 64% | 2923 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,766 psi | 56% | 2825 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,880 psi | 81% | 2923 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,798 psi | 62% | 2838 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 33,344 psi | 52% | 2694 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,759 psi | 70% | 2861 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,205 psi | 65% | 2874 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,266 psi | 71% | 3022 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 45,426 psi | 71% | 2920 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,837 psi | 83% | 3051 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,003 psi | 66% | 2877 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 96% | 51,895 psi | 81% | 3123 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 80% | 54,259 psi | 85% | 2982 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 41,162 psi | 65% | 2858 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,302 psi | 55% | 2749 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,882 psi | 55% | 2759 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 41% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,622 psi | 57% | 2736 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 36,854 psi | 58% | 2792 fps | 99.9% |
| IMR 4064 | <<locked>> | 82% | 36,100 psi | 57% | 2710 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,025 psi | 82% | 3002 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 50,154 psi | 79% | 2910 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,779 psi | 83% | 3045 fps | 95.5% |
| IMR 4831 | <<locked>> | 98% | 39,943 psi | 63% | 2874 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 37,521 psi | 59% | 2802 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,859 psi | 67% | 2864 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 48,182 psi | 76% | 2956 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,378 psi | 62% | 2822 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 41,307 psi | 65% | 2789 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 36,230 psi | 57% | 2726 fps | 97.1% |
| Lovex S065 | <<locked>> | 94% | 45,919 psi | 72% | 2927 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 49,371 psi | 77% | 3012 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,885 psi | 63% | 2799 fps | 98% |
| Norma 202 | <<locked>> | 80% | 40,045 psi | 63% | 2815 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 36,056 psi | 56% | 2753 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 41,031 psi | 64% | 2910 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 37,942 psi | 59% | 2818 fps | 95.9% |
| Ramshot TAC | <<locked>> | 82% | 45,759 psi | 72% | 2917 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,989 psi | 66% | 2877 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,267 psi | 73% | 2910 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 41% | 1749 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,095 psi | 75% | 2959 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,544 psi | 76% | 2976 fps | 95.3% |
| ReloadSwiss RS 52 | 53.3 gr | 80% | 38,014 psi | 60% | 2867 fps | 95.5% |
| ReloadSwiss RS 60 | 54.1 gr | 80% | 31,314 psi | 49% | 2710 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,756 psi | 64% | 2933 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,353 psi | 70% | 3009 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,830 psi | 69% | 2861 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,985 psi | 60% | 2746 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 33,605 psi | 53% | 2694 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,919 psi | 72% | 2927 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,378 psi | 62% | 2822 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 36,230 psi | 57% | 2726 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 98% | 49,371 psi | 77% | 3012 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,734 psi | 80% | 2976 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,853 psi | 84% | 3064 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,057 psi | 58% | 2805 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,778 psi | 80% | 2972 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,801 psi | 69% | 2884 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,407 psi | 62% | 2808 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,539 psi | 65% | 2769 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,287 psi | 54% | 2618 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,257 psi | 82% | 2986 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 46,180 psi | 72% | 2946 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 40,944 psi | 64% | 2766 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,567 psi | 64% | 2825 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 34,577 psi | 54% | 2703 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 30,226 psi | 47% | 2671 fps | 95% |
| Unknown powder | <<locked>> | 92% | 42,148 psi | 66% | 2923 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 53,925 psi | 85% | 2894 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 46,021 psi | 72% | 2835 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,986 psi | 61% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,188 psi | 58% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,492 psi | 59% | 2740 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 29,443 psi | 46% | 2549 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 90% | 39,639 psi | 62% | 2838 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 45,121 psi | 71% | 2923 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 37,057 psi | 58% | 2749 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 90% | 40,030 psi | 63% | 2884 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,736 psi | 53% | 2664 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 45,397 psi | 71% | 2969 fps | 99.5% |
| Winchester 760 | <<locked>> | 96% | 51,895 psi | 81% | 3123 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,385 psi | 76% | 3012 fps | 99% |
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 101 powders for .300 WSM loaded with the .308 | 140gr | Barnes MPG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,284 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 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 140.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 52 rank at the top here: for .300 WSM with the .308 | 140gr | Barnes MPG 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.