Load Specifications
Bullet Manufacturer:Norma
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:1:12.5
Load data in caliber .300 WSM with .308 | 150gr | Norma Kalahari 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 Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 54,288 psi | 85% | 2913 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,130 psi | 88% | 2989 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,391 psi | 88% | 2982 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,797 psi | 89% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,971 psi | 89% | 2982 fps | 96.6% |
| Accurate 4064 | <<locked>> | 92% | 56,289 psi | 88% | 3031 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3117 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 56,898 psi | 89% | 3068 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 54,549 psi | 85% | 3012 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,941 psi | 88% | 3018 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,666 psi | 89% | 2992 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,608 psi | 89% | 3189 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,505 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,130 psi | 90% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,940 psi | 86% | 3054 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3120 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,390 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,479 psi | 60% | 2825 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,134 psi | 68% | 2989 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,000 psi | 89% | 3084 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 54,984 psi | 86% | 3051 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,347 psi | 87% | 3015 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,609 psi | 90% | 2999 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,303 psi | 87% | 3045 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,464 psi | 90% | 3153 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,767 psi | 87% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,086 psi | 88% | 3061 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 57,334 psi | 90% | 3136 fps | 97.7% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3091 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 88% | 57,450 psi | 90% | 3077 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,067 psi | 78% | 2986 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,014 psi | 89% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,478 psi | 89% | 3146 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,360 psi | 55% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,609 psi | 90% | 3061 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,622 psi | 87% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,376 psi | 88% | 3031 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,130 psi | 88% | 3005 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 57,087 psi | 89% | 2923 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 3035 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,232 psi | 90% | 3048 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,282 psi | 74% | 2946 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 56,333 psi | 88% | 3087 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 55,941 psi | 88% | 3018 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,260 psi | 88% | 3002 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,797 psi | 89% | 3041 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,347 psi | 88% | 2989 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 57,159 psi | 90% | 3045 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,275 psi | 88% | 3035 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3077 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 55,521 psi | 87% | 3009 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,260 psi | 88% | 3015 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,099 psi | 85% | 3041 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3104 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 54,665 psi | 86% | 3068 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3094 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 56,449 psi | 88% | 3035 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,941 psi | 88% | 3054 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,869 psi | 89% | 3018 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 56% | 1909 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,347 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,347 psi | 88% | 3041 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,361 psi | 87% | 3127 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,085 psi | 86% | 3163 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3140 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3163 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 86% | 56,478 psi | 89% | 2992 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,115 psi | 88% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,766 psi | 86% | 3038 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,347 psi | 87% | 3015 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,275 psi | 88% | 3035 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,797 psi | 89% | 3041 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,159 psi | 90% | 3045 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3077 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,623 psi | 89% | 3104 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,621 psi | 86% | 3005 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,303 psi | 87% | 3035 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,101 psi | 89% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,377 psi | 90% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,971 psi | 89% | 2989 fps | 97.4% |
| Somchem S321 | <<locked>> | 84% | 57,363 psi | 90% | 3054 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,376 psi | 88% | 2943 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,201 psi | 85% | 2999 fps | 99.7% |
| Somchem S355 | <<locked>> | 94% | 55,071 psi | 86% | 3038 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 3048 fps | 100% |
| Unknown powder | <<locked>> | 98% | 56,536 psi | 89% | 3110 fps | 99% |
| Vihtavuori N130 | <<locked>> | 84% | 55,680 psi | 87% | 2897 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,710 psi | 89% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,767 psi | 87% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,927 psi | 88% | 2982 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,116 psi | 90% | 3081 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 55,724 psi | 87% | 3025 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,666 psi | 87% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,406 psi | 90% | 3133 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,076 psi | 66% | 2910 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,781 psi | 86% | 3022 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,072 psi | 89% | 3077 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,334 psi | 90% | 3136 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,592 psi | 54% | 2812 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,623 psi | 89% | 3064 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% | 48,022 psi | 75% | 2818 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,736 psi | 83% | 2936 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,611 psi | 64% | 2733 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,209 psi | 72% | 2877 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,893 psi | 78% | 2867 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,392 psi | 60% | 2720 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,028 psi | 58% | 2749 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,237 psi | 69% | 2841 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,550 psi | 59% | 2677 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,311 psi | 73% | 2854 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 46,586 psi | 73% | 2848 fps | 100% |
| Alliant Power Pro 2000-MR | 56.7 gr | 80% | 40,263 psi | 63% | 2864 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,144 psi | 58% | 2703 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,882 psi | 84% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,972 psi | 63% | 2769 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,159 psi | 58% | 2766 fps | 95.6% |
| Alliant Reloder-17 | 55.8 gr | 80% | 32,140 psi | 50% | 2657 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,966 psi | 50% | 2648 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,016 psi | 63% | 2917 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,352 psi | 68% | 2841 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 36,869 psi | 58% | 2707 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 48,646 psi | 76% | 2897 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,051 psi | 75% | 2844 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,223 psi | 71% | 2874 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,821 psi | 78% | 3025 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 49,052 psi | 77% | 2897 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,579 psi | 59% | 2707 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 90% | 46,630 psi | 73% | 2949 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 98% | 54,114 psi | 85% | 3035 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 44,643 psi | 70% | 2858 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,966 psi | 50% | 2595 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,130 psi | 60% | 2766 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 94% | 49,008 psi | 77% | 3012 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 41% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,726 psi | 62% | 2740 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 40,451 psi | 63% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,738 psi | 58% | 2654 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,775 psi | 73% | 2838 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 53,795 psi | 84% | 2877 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 48,892 psi | 77% | 2923 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,471 psi | 74% | 2881 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 36,666 psi | 57% | 2726 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,930 psi | 64% | 2805 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 46,311 psi | 73% | 2854 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 52,576 psi | 82% | 2946 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,323 psi | 68% | 2822 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,193 psi | 69% | 2776 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,276 psi | 62% | 2723 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 41,437 psi | 65% | 2766 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 44,657 psi | 70% | 2848 fps | 95% |
| Norma 201 | <<locked>> | 80% | 43,250 psi | 68% | 2792 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,540 psi | 68% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,334 psi | 62% | 2759 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 37,347 psi | 59% | 2753 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,914 psi | 61% | 2769 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 44,338 psi | 69% | 2910 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 46,340 psi | 73% | 2858 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,643 psi | 72% | 2877 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,009 psi | 78% | 2904 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,701 psi | 42% | 1713 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,793 psi | 81% | 2940 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,497 psi | 68% | 2805 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,858 psi | 66% | 2874 fps | 97.6% |
| ReloadSwiss RS 60 | 55.8 gr | 80% | 34,185 psi | 54% | 2730 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,825 psi | 58% | 2766 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,552 psi | 62% | 2835 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 47,181 psi | 74% | 2841 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,278 psi | 65% | 2743 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 34,577 psi | 54% | 2644 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 48,646 psi | 76% | 2897 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,437 psi | 65% | 2766 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,323 psi | 68% | 2822 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 39,276 psi | 62% | 2723 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 44,657 psi | 70% | 2848 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,549 psi | 56% | 2694 fps | 96.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,614 psi | 70% | 2828 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,670 psi | 67% | 2805 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,657 psi | 70% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,101 psi | 58% | 2605 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 46,789 psi | 73% | 2822 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 50,024 psi | 78% | 2936 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 44,222 psi | 69% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,121 psi | 69% | 2825 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 35,433 psi | 56% | 2654 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 29,211 psi | 46% | 2575 fps | 95.9% |
| Unknown powder | <<locked>> | 88% | 40,596 psi | 64% | 2815 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,385 psi | 77% | 2805 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,105 psi | 66% | 2697 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,640 psi | 64% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,828 psi | 64% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,298 psi | 47% | 2500 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 86% | 38,189 psi | 60% | 2733 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 48,791 psi | 76% | 2910 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,451 psi | 63% | 2746 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 38,566 psi | 60% | 2776 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 34,505 psi | 54% | 2733 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,082 psi | 50% | 2559 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 49,574 psi | 78% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,630 psi | 73% | 2949 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,343 psi | 51% | 2736 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,721 psi | 83% | 3005 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 101 powders for .300 WSM loaded with the .308 | 150gr | Norma Kalahari. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,189 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 54–90 %, leaving at least 10 % headroom. The 150.0 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .300 WSM with the .308 | 150gr | Norma Kalahari 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.