Load Specifications
Bullet:.308 | 146.6gr | Sax KDG-S
Bullet Manufacturer:Sax
Bullet Weight:146.6 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:1:12.5
Load data in caliber .300 WSM with .308 | 146.6gr | Sax KDG-S 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, 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% | 55,419 psi | 87% | 2969 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,479 psi | 90% | 3045 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,971 psi | 89% | 3031 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,215 psi | 85% | 3041 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,215 psi | 85% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,795 psi | 86% | 2979 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 55,129 psi | 86% | 3048 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 3127 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 55,883 psi | 88% | 3084 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 57,014 psi | 89% | 3081 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,969 psi | 86% | 3035 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,492 psi | 87% | 3012 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,419 psi | 87% | 3133 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,506 psi | 87% | 3199 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,898 psi | 89% | 3104 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,420 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,566 psi | 90% | 3127 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 3123 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,954 psi | 85% | 3166 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,681 psi | 59% | 2828 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,148 psi | 66% | 2992 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,956 psi | 88% | 3097 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 57,696 psi | 90% | 3120 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,609 psi | 90% | 3077 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,695 psi | 89% | 3015 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,724 psi | 89% | 3104 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,100 psi | 86% | 3153 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 84% | 54,752 psi | 86% | 3018 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,013 psi | 86% | 3074 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 96% | 56,159 psi | 88% | 3146 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 88% | 56,420 psi | 88% | 3094 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2995 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,607 psi | 86% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,390 psi | 87% | 3153 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 55% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,550 psi | 87% | 3068 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,476 psi | 85% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,376 psi | 87% | 3045 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,216 psi | 87% | 3015 fps | 96.9% |
| IMR 4198 | <<locked>> | 82% | 56,144 psi | 88% | 2943 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 3045 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,230 psi | 87% | 3048 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,224 psi | 72% | 2956 fps | 97.9% |
| IMR 4895 | <<locked>> | 90% | 55,259 psi | 87% | 3104 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 54,969 psi | 86% | 3035 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,216 psi | 87% | 3018 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,651 psi | 87% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,477 psi | 87% | 3005 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 56,101 psi | 88% | 3058 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,259 psi | 87% | 3051 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3087 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 54,520 psi | 85% | 3022 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,230 psi | 87% | 3031 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,710 psi | 89% | 3114 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 54,172 psi | 85% | 3114 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 57,595 psi | 90% | 3140 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,881 psi | 83% | 3097 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 55,492 psi | 87% | 3048 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,911 psi | 86% | 3068 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,927 psi | 88% | 3031 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 56% | 1929 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,389 psi | 85% | 3012 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,332 psi | 87% | 3051 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,186 psi | 85% | 3136 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,537 psi | 90% | 3232 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3146 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3173 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 55,535 psi | 87% | 3009 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,114 psi | 86% | 3025 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,232 psi | 90% | 3107 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,609 psi | 90% | 3077 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,259 psi | 87% | 3051 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,651 psi | 87% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,101 psi | 88% | 3058 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 3071 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,740 psi | 90% | 3038 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,492 psi | 87% | 3117 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,217 psi | 88% | 3002 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,609 psi | 90% | 3084 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,302 psi | 85% | 3048 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,144 psi | 88% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,391 psi | 88% | 2959 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,985 psi | 88% | 3002 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 56,333 psi | 88% | 3068 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,434 psi | 87% | 2963 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,116 psi | 90% | 3074 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 57,479 psi | 90% | 3104 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 3054 fps | 100% |
| Unknown powder | <<locked>> | 98% | 55,347 psi | 87% | 3123 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 84% | 54,766 psi | 86% | 2917 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,738 psi | 87% | 2946 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,710 psi | 89% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,911 psi | 86% | 2999 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3031 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,912 psi | 88% | 3094 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 54,723 psi | 86% | 3041 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,665 psi | 86% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,173 psi | 88% | 3143 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,959 psi | 64% | 2917 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3091 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,956 psi | 88% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,159 psi | 88% | 3146 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,550 psi | 87% | 3077 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% | 45,818 psi | 72% | 2822 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,285 psi | 79% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,942 psi | 59% | 2720 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,845 psi | 69% | 2871 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 43,845 psi | 69% | 2871 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 51,213 psi | 80% | 2920 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 37,565 psi | 59% | 2733 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 38,638 psi | 61% | 2815 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 43,424 psi | 68% | 2854 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,825 psi | 58% | 2690 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,469 psi | 71% | 2867 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 45,585 psi | 71% | 2864 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,909 psi | 81% | 3074 fps | 99.7% |
| Alliant Power Pro 2000-MR | 56.6 gr | 80% | 39,450 psi | 62% | 2871 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,361 psi | 57% | 2713 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,924 psi | 83% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,160 psi | 61% | 2782 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 38,783 psi | 61% | 2831 fps | 95.9% |
| Alliant Reloder-17 | 57.1 gr | 82% | 33,663 psi | 53% | 2726 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 33,257 psi | 52% | 2710 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,131 psi | 61% | 2917 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,496 psi | 67% | 2851 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 36,042 psi | 56% | 2713 fps | 97.4% |
| Bofors RP7 | <<locked>> | 94% | 50,850 psi | 80% | 2963 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,282 psi | 74% | 2858 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,091 psi | 68% | 2871 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,616 psi | 75% | 3022 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,124 psi | 75% | 2913 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,465 psi | 62% | 2776 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 48,907 psi | 77% | 3022 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 43,787 psi | 69% | 2867 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 33,359 psi | 52% | 2661 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,390 psi | 57% | 2759 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 96% | 51,416 psi | 81% | 3084 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 41% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,000 psi | 60% | 2733 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 39,566 psi | 62% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,230 psi | 57% | 2667 fps | 95.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,878 psi | 77% | 2904 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 52,953 psi | 83% | 2897 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 51,068 psi | 80% | 2989 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,559 psi | 76% | 2930 fps | 95.3% |
| IMR 4831 | <<locked>> | 94% | 38,232 psi | 60% | 2789 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 40,089 psi | 63% | 2812 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 45,469 psi | 71% | 2867 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 51,576 psi | 81% | 2963 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,395 psi | 66% | 2835 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 43,613 psi | 68% | 2792 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 38,696 psi | 61% | 2736 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 43,207 psi | 68% | 2828 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 46,601 psi | 73% | 2913 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 42,453 psi | 67% | 2805 fps | 99% |
| Norma 202 | <<locked>> | 80% | 42,714 psi | 67% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,522 psi | 60% | 2766 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 38,972 psi | 61% | 2818 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 38,130 psi | 60% | 2779 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 94% | 43,439 psi | 68% | 2917 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,513 psi | 71% | 2867 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,773 psi | 70% | 2887 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,197 psi | 77% | 2917 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 41% | 1726 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,879 psi | 80% | 2956 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,600 psi | 71% | 2877 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,872 psi | 64% | 2884 fps | 97.1% |
| ReloadSwiss RS 60 | 55.7 gr | 80% | 33,489 psi | 52% | 2736 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,551 psi | 60% | 2835 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,655 psi | 65% | 2910 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 46,369 psi | 73% | 2858 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,480 psi | 63% | 2756 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,837 psi | 53% | 2651 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 50,850 psi | 80% | 2963 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,207 psi | 68% | 2828 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,395 psi | 66% | 2835 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 38,696 psi | 61% | 2736 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 96% | 48,254 psi | 76% | 2953 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,969 psi | 85% | 2982 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,809 psi | 55% | 2703 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,634 psi | 82% | 2953 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,743 psi | 69% | 2838 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,858 psi | 66% | 2818 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,888 psi | 69% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,434 psi | 57% | 2618 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,936 psi | 77% | 2887 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 49,095 psi | 77% | 2949 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,424 psi | 68% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,308 psi | 68% | 2835 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 34,693 psi | 54% | 2661 fps | 96.4% |
| Somchem S365 | <<locked>> | 84% | 28,718 psi | 45% | 2585 fps | 95.2% |
| Unknown powder | <<locked>> | 88% | 39,726 psi | 62% | 2825 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 48,544 psi | 76% | 2822 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,350 psi | 65% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,508 psi | 60% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,016 psi | 63% | 2743 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,631 psi | 46% | 2510 fps | 96% |
| Vihtavuori N160 | <<locked>> | 86% | 37,362 psi | 59% | 2740 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 47,892 psi | 75% | 2923 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 39,653 psi | 62% | 2759 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 37,710 psi | 59% | 2785 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 35,926 psi | 56% | 2799 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,473 psi | 49% | 2566 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 48,602 psi | 76% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 48,907 psi | 77% | 3022 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,706 psi | 81% | 3015 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 103 powders for .300 WSM loaded with the .308 | 146.6gr | Sax KDG-S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,232 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 55–90 %, leaving at least 10 % headroom. The 146.6 gr projectile in 0.308" calls for a 1:12.5 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 146.6gr | Sax KDG-S 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.