Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:171 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:1:14.5
Load data in caliber .300 WSM with .308 | 171gr | Peregrine Backup (VRG-2) 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 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 54,708 psi | 86% | 2743 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,159 psi | 90% | 2815 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,216 psi | 87% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,275 psi | 88% | 2835 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,338 psi | 69% | 2730 fps | 97.5% |
| Accurate 4064 | <<locked>> | 90% | 57,334 psi | 90% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,099 psi | 85% | 2913 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 57,479 psi | 90% | 2904 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,129 psi | 86% | 2854 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2894 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,449 psi | 88% | 2854 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,143 psi | 85% | 2776 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,795 psi | 84% | 2972 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,025 psi | 82% | 2887 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,376 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,724 psi | 87% | 2897 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,332 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,739 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 2877 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 2762 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2936 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,809 psi | 84% | 2867 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 55,898 psi | 88% | 2890 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,941 psi | 88% | 2871 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,447 psi | 85% | 2782 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,970 psi | 88% | 2881 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,927 psi | 89% | 2910 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 56,884 psi | 89% | 2966 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 57,319 psi | 90% | 2930 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 54,621 psi | 86% | 2864 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,376 psi | 87% | 2897 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,462 psi | 85% | 2897 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,696 psi | 90% | 3012 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,636 psi | 56% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,767 psi | 87% | 2864 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,853 psi | 86% | 2841 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,563 psi | 86% | 2838 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,404 psi | 85% | 2818 fps | 98.3% |
| IMR 4350 | <<locked>> | 98% | 56,391 psi | 88% | 2897 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,491 psi | 85% | 2848 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 54,723 psi | 86% | 2907 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 57,159 psi | 90% | 2927 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,449 psi | 88% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,696 psi | 90% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,884 psi | 89% | 2831 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,317 psi | 85% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,305 psi | 90% | 2894 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 54,911 psi | 86% | 2877 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 56,115 psi | 88% | 2848 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,855 psi | 89% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,911 psi | 86% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,334 psi | 90% | 2949 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,355 psi | 74% | 2890 fps | 97.2% |
| Norma URP | <<locked>> | 98% | 56,782 psi | 89% | 2956 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 55,941 psi | 88% | 2913 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,535 psi | 87% | 2953 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 56,782 psi | 89% | 2881 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,492 psi | 89% | 2894 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,058 psi | 89% | 2854 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 57% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,159 psi | 90% | 2894 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,739 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,362 psi | 88% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,838 psi | 84% | 2933 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,942 psi | 89% | 3022 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 56,782 psi | 89% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,449 psi | 88% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,767 psi | 87% | 2881 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2861 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 55,941 psi | 88% | 2871 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,305 psi | 90% | 2894 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,696 psi | 90% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,317 psi | 85% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,911 psi | 86% | 2877 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,143 psi | 85% | 2894 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,013 psi | 86% | 2851 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,072 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,493 psi | 90% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,505 psi | 85% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,595 psi | 90% | 2848 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2854 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 57,725 psi | 90% | 2884 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,913 psi | 89% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,824 psi | 86% | 2844 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,159 psi | 88% | 2884 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 2956 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2838 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 82% | 57,101 psi | 89% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 54,346 psi | 85% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,782 psi | 89% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,435 psi | 90% | 2822 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,983 psi | 85% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,709 psi | 87% | 2897 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 56,985 psi | 89% | 2851 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,477 psi | 87% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,433 psi | 85% | 2900 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2838 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,680 psi | 87% | 2871 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,305 psi | 90% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,159 psi | 90% | 2972 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,753 psi | 59% | 2782 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,970 psi | 88% | 2884 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% | 51,329 psi | 80% | 2697 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,801 psi | 69% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,561 psi | 81% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,960 psi | 67% | 2605 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 38,609 psi | 61% | 2618 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 41,495 psi | 65% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,793 psi | 51% | 2503 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 47,456 psi | 74% | 2743 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,437 psi | 63% | 2595 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 48,936 psi | 77% | 2831 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,603 psi | 78% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,618 psi | 79% | 2726 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,642 psi | 68% | 2789 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,791 psi | 76% | 2831 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,263 psi | 63% | 2618 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,047 psi | 67% | 2680 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,112 psi | 52% | 2523 fps | 96% |
| Alliant Reloder-17 | 55.8 gr | 80% | 34,708 psi | 54% | 2592 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,109 psi | 75% | 2825 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,761 psi | 45% | 2428 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,214 psi | 52% | 2608 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,065 psi | 74% | 2756 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 39,871 psi | 62% | 2621 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 43,453 psi | 68% | 2651 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,198 psi | 80% | 2733 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,849 psi | 77% | 2776 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,698 psi | 64% | 2628 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 40,625 psi | 64% | 2677 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 47,282 psi | 74% | 2762 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 47,921 psi | 75% | 2756 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,485 psi | 45% | 2365 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,280 psi | 69% | 2733 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,062 psi | 67% | 2753 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 41% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,934 psi | 72% | 2707 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 47,979 psi | 75% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,482 psi | 67% | 2631 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,744 psi | 70% | 2651 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 43,729 psi | 69% | 2677 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,380 psi | 66% | 2631 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 31,981 psi | 50% | 2467 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,121 psi | 69% | 2713 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 49,603 psi | 78% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,833 psi | 73% | 2720 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,282 psi | 74% | 2680 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 42,337 psi | 66% | 2631 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,999 psi | 58% | 2523 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 39,914 psi | 63% | 2605 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 46,427 psi | 73% | 2694 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,992 psi | 74% | 2700 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,409 psi | 66% | 2671 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 50,067 psi | 78% | 2835 fps | 95.9% |
| Norma MRP | <<locked>> | 96% | 41,162 psi | 65% | 2762 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 33,373 psi | 52% | 2513 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 42,322 psi | 66% | 2687 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 37,173 psi | 58% | 2608 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 49,647 psi | 78% | 2762 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,443 psi | 77% | 2782 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,505 psi | 84% | 2802 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 42% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,075 psi | 64% | 2615 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,064 psi | 72% | 2795 fps | 99.4% |
| ReloadSwiss RS 60 | 55.8 gr | 80% | 36,999 psi | 58% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,808 psi | 51% | 2526 fps | 95.3% |
| ReloadSwiss RS 70 | 59.5 gr | 84% | 34,969 psi | 55% | 2589 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 50,343 psi | 79% | 2730 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,019 psi | 69% | 2644 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,391 psi | 59% | 2562 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 46,804 psi | 73% | 2802 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 86% | 43,453 psi | 68% | 2651 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,999 psi | 58% | 2523 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,833 psi | 73% | 2720 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,337 psi | 66% | 2631 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,914 psi | 63% | 2605 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,754 psi | 61% | 2621 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,993 psi | 75% | 2740 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,108 psi | 72% | 2717 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,572 psi | 75% | 2638 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,769 psi | 62% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,307 psi | 65% | 2575 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,340 psi | 73% | 2795 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 54,012 psi | 85% | 2831 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,326 psi | 74% | 2641 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,877 psi | 75% | 2736 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,276 psi | 60% | 2569 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 27,731 psi | 43% | 2402 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 44,483 psi | 70% | 2730 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 53,635 psi | 84% | 2694 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,051 psi | 75% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,845 psi | 69% | 2621 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,353 psi | 70% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,318 psi | 57% | 2503 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,445 psi | 51% | 2457 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 49,879 psi | 78% | 2746 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,844 psi | 67% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,127 psi | 53% | 2510 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 31,096 psi | 49% | 2503 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,227 psi | 51% | 2438 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 49,951 psi | 78% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,814 psi | 64% | 2680 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,834 psi | 45% | 2513 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,672 psi | 72% | 2720 fps | 99.8% |
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 | 171gr | Peregrine Backup (VRG-2). ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,759 fps to 3,022 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 171.0 gr projectile in 0.308" calls for a 1:14.5 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 WSM with the .308 | 171gr | Peregrine Backup (VRG-2) 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.