Load Specifications
Bullet:.308 | 165gr | Speer TBBC
Bullet Manufacturer:Speer
Bullet Weight:165 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:1:13.5
Load data in caliber .300 WSM with .308 | 165gr | Speer TBBC bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon Superformance.
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>> | 82% | 54,592 psi | 86% | 2785 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,319 psi | 90% | 2861 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,450 psi | 90% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,159 psi | 90% | 2871 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,425 psi | 70% | 2769 fps | 97.1% |
| Accurate 4064 | <<locked>> | 90% | 57,348 psi | 90% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 57,493 psi | 90% | 3005 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 57,406 psi | 90% | 2946 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,984 psi | 86% | 2894 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2920 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,086 psi | 88% | 2890 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,435 psi | 90% | 2861 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,319 psi | 90% | 3071 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,750 psi | 81% | 2920 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,969 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,622 psi | 87% | 2936 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,708 psi | 86% | 3005 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,999 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 2910 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,959 psi | 66% | 2795 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2969 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,261 psi | 90% | 2959 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 55,927 psi | 88% | 2933 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,564 psi | 87% | 2904 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,725 psi | 90% | 2871 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,854 psi | 88% | 2923 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 56,101 psi | 88% | 2871 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,550 psi | 89% | 2943 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 54,418 psi | 85% | 2969 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 96% | 54,897 psi | 86% | 2930 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 54,346 psi | 85% | 2900 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2930 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,725 psi | 90% | 2989 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,276 psi | 90% | 3041 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 56% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,534 psi | 85% | 2887 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,695 psi | 89% | 2910 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 57,101 psi | 89% | 2917 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,347 psi | 88% | 2890 fps | 98.3% |
| IMR 4350 | <<locked>> | 98% | 56,072 psi | 88% | 2930 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,406 psi | 90% | 2933 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 2897 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 57,029 psi | 89% | 2969 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,086 psi | 88% | 2890 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,450 psi | 90% | 2917 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,478 psi | 89% | 2867 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,317 psi | 85% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,971 psi | 89% | 2927 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 54,592 psi | 86% | 2913 fps | 98.3% |
| Norma 201 | <<locked>> | 86% | 55,970 psi | 88% | 2887 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,536 psi | 89% | 2884 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,810 psi | 86% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 98% | 56,956 psi | 89% | 2986 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 47,181 psi | 74% | 2923 fps | 96.6% |
| Norma URP | <<locked>> | 98% | 56,231 psi | 88% | 2989 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 55,448 psi | 87% | 2949 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,187 psi | 86% | 2989 fps | 98.9% |
| Ramshot TAC | <<locked>> | 84% | 56,376 psi | 88% | 2913 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,289 psi | 88% | 2933 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,971 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 57% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,724 psi | 89% | 2927 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,217 psi | 88% | 3005 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,709 psi | 87% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,421 psi | 90% | 3031 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,536 psi | 89% | 3058 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 56,811 psi | 89% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,594 psi | 89% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,753 psi | 87% | 2923 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,564 psi | 87% | 2904 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,971 psi | 89% | 2927 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,450 psi | 90% | 2917 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,317 psi | 85% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,592 psi | 86% | 2913 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,348 psi | 90% | 2986 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,027 psi | 86% | 2890 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,622 psi | 87% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,159 psi | 90% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,653 psi | 90% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,435 psi | 90% | 2884 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 57,377 psi | 90% | 2923 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,666 psi | 89% | 2818 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,636 psi | 86% | 2881 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,811 psi | 87% | 2920 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2992 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,546 psi | 79% | 2874 fps | 96.8% |
| Unknown powder | <<locked>> | 96% | 57,261 psi | 90% | 2999 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 82% | 55,695 psi | 87% | 2766 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,898 psi | 89% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,449 psi | 88% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,188 psi | 88% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,377 psi | 90% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,331 psi | 85% | 2913 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 55,782 psi | 87% | 2897 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,970 psi | 88% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,462 psi | 85% | 2959 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,630 psi | 73% | 2874 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,332 psi | 87% | 2907 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,363 psi | 90% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,418 psi | 85% | 2969 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2808 fps | 99.6% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2894 fps | 96.1% |
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% | 51,256 psi | 80% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,208 psi | 69% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,082 psi | 78% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,934 psi | 74% | 2707 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 38,638 psi | 61% | 2651 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 41,829 psi | 66% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,170 psi | 52% | 2543 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 47,500 psi | 74% | 2782 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 40,335 psi | 63% | 2628 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 98% | 48,718 psi | 76% | 2861 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,314 psi | 79% | 2766 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,381 psi | 68% | 2822 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,370 psi | 76% | 2861 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,205 psi | 63% | 2654 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,163 psi | 68% | 2720 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,286 psi | 52% | 2559 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,867 psi | 55% | 2628 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,703 psi | 75% | 2851 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,921 psi | 45% | 2461 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 35,578 psi | 56% | 2703 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,818 psi | 73% | 2789 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 39,972 psi | 63% | 2657 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 43,410 psi | 68% | 2684 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,213 psi | 80% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,660 psi | 76% | 2812 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 52,634 psi | 82% | 2822 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,698 psi | 64% | 2664 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 84% | 41,249 psi | 65% | 2726 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 92% | 48,530 psi | 76% | 2818 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 48,008 psi | 75% | 2795 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,645 psi | 45% | 2398 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,466 psi | 65% | 2717 fps | 99.5% |
| Hodgdon Superformance | 65 gr | 88% | 43,004 psi | 67% | 2782 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 42% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,496 psi | 67% | 2677 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 43,947 psi | 69% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,537 psi | 62% | 2605 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,756 psi | 65% | 2625 fps | 95.1% |
| IMR 4350 | <<locked>> | 90% | 43,685 psi | 68% | 2713 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,395 psi | 66% | 2667 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 33,069 psi | 52% | 2526 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 44,251 psi | 69% | 2753 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,992 psi | 74% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,094 psi | 74% | 2713 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 42,366 psi | 66% | 2667 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 37,130 psi | 58% | 2559 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 42,685 psi | 67% | 2697 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 46,441 psi | 73% | 2733 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 46,905 psi | 74% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,540 psi | 67% | 2710 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 49,603 psi | 78% | 2864 fps | 95.2% |
| Norma MRP | <<locked>> | 98% | 44,034 psi | 69% | 2858 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 33,373 psi | 52% | 2546 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 42,105 psi | 66% | 2720 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 39,624 psi | 62% | 2697 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 49,400 psi | 77% | 2799 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,168 psi | 77% | 2818 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,461 psi | 84% | 2841 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 42% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,031 psi | 64% | 2644 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,759 psi | 72% | 2831 fps | 99.2% |
| ReloadSwiss RS 60 | 55.9 gr | 80% | 37,101 psi | 58% | 2697 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,201 psi | 55% | 2615 fps | 95.7% |
| ReloadSwiss RS 70 | 61 gr | 86% | 37,521 psi | 59% | 2684 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 50,517 psi | 79% | 2769 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,353 psi | 70% | 2687 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 37,710 psi | 59% | 2605 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 43,410 psi | 68% | 2684 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,130 psi | 58% | 2559 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,992 psi | 74% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,366 psi | 66% | 2667 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 42,685 psi | 67% | 2697 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,624 psi | 61% | 2654 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,877 psi | 75% | 2772 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,948 psi | 72% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,688 psi | 75% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,900 psi | 63% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,481 psi | 65% | 2608 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 53,708 psi | 84% | 2867 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,311 psi | 74% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,630 psi | 75% | 2769 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 38,363 psi | 60% | 2608 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 28,065 psi | 44% | 2441 fps | 96.7% |
| Somchem S385 | <<locked>> | 96% | 44,280 psi | 69% | 2759 fps | 95.2% |
| Unknown powder | <<locked>> | 82% | 36,260 psi | 57% | 2605 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 52,620 psi | 82% | 2723 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,875 psi | 70% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,034 psi | 69% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,787 psi | 69% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,895 psi | 52% | 2461 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,953 psi | 53% | 2523 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 52,373 psi | 82% | 2844 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,366 psi | 68% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,374 psi | 54% | 2566 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 31,212 psi | 49% | 2536 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,271 psi | 51% | 2467 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 53,621 psi | 84% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 41,249 psi | 65% | 2726 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,022 psi | 45% | 2539 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,110 psi | 77% | 2835 fps | 95.2% |
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 102 powders for .300 WSM loaded with the .308 | 165gr | Speer TBBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,071 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 60, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .300 WSM with the .308 | 165gr | Speer TBBC 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.