Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 160gr | Peregrine VRG-3 Lever bullet and 95 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 2495 | <<locked>> | 84% | 54,172 psi | 87% | 2890 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,056 psi | 87% | 2910 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2923 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 54,433 psi | 87% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,361 psi | 89% | 3048 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 54,389 psi | 87% | 2976 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,564 psi | 89% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,243 psi | 85% | 3028 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,520 psi | 87% | 3104 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,130 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,275 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 52,924 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,998 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 3074 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 3005 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,557 psi | 75% | 2949 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,611 psi | 65% | 2848 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 3143 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,244 psi | 87% | 2992 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 52,997 psi | 85% | 2963 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 3005 fps | 96.3% |
| Bofors RP7 | <<locked>> | 90% | 52,953 psi | 85% | 2943 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 86% | 53,679 psi | 86% | 2979 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 55,724 psi | 89% | 3068 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 56,173 psi | 90% | 3035 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,969 psi | 88% | 2989 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,084 psi | 85% | 2976 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,187 psi | 88% | 3025 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,607 psi | 88% | 3081 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 58% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,027 psi | 88% | 2976 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,925 psi | 86% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,346 psi | 87% | 2956 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,316 psi | 85% | 2927 fps | 98.3% |
| IMR 4350 | <<locked>> | 94% | 53,737 psi | 86% | 2972 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,708 psi | 88% | 2976 fps | 98.5% |
| IMR 4831 | <<locked>> | 98% | 53,156 psi | 85% | 2995 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 54,128 psi | 87% | 3002 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,331 psi | 87% | 2946 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,417 psi | 86% | 2904 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,926 psi | 88% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,418 psi | 87% | 2969 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 55,825 psi | 90% | 3012 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,799 psi | 65% | 2759 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 56,347 psi | 90% | 2972 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,751 psi | 86% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,535 psi | 89% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,505 psi | 87% | 3025 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 52,605 psi | 84% | 3097 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 54,418 psi | 87% | 3035 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 52,736 psi | 85% | 2982 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,101 psi | 90% | 3123 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 53,171 psi | 85% | 3028 fps | 99% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,530 psi | 78% | 2963 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,809 psi | 86% | 2963 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,722 psi | 86% | 3041 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,708 psi | 86% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,463 psi | 89% | 3071 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,259 psi | 87% | 3100 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 53,534 psi | 86% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,084 psi | 85% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,100 psi | 88% | 3002 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,013 psi | 88% | 3058 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 52,953 psi | 85% | 2943 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,418 psi | 87% | 2969 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,331 psi | 87% | 2946 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,926 psi | 88% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,825 psi | 90% | 3012 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,100 psi | 88% | 3025 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,405 psi | 89% | 2979 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,362 psi | 90% | 3002 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,940 psi | 86% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,926 psi | 88% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,433 psi | 87% | 2920 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 3051 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 53,548 psi | 86% | 2851 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,172 psi | 88% | 2966 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,330 psi | 86% | 2956 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,156 psi | 85% | 3035 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,695 psi | 89% | 3035 fps | 98.3% |
| Unknown powder | <<locked>> | 92% | 55,071 psi | 88% | 3041 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 84% | 54,056 psi | 87% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,679 psi | 86% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,432 psi | 86% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,042 psi | 88% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,767 psi | 89% | 3012 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 2854 fps | 96% |
| Vihtavuori N540 | <<locked>> | 84% | 53,113 psi | 85% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,898 psi | 90% | 3058 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 3031 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,939 psi | 85% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,724 psi | 89% | 3068 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,901 psi | 67% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,375 psi | 87% | 2999 fps | 97.1% |
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 2495 | <<locked>> | 80% | 47,485 psi | 76% | 2789 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,237 psi | 71% | 2733 fps | 95.6% |
| Accurate 3100 | <<locked>> | 92% | 37,144 psi | 60% | 2680 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,991 psi | 72% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,779 psi | 54% | 2618 fps | 96% |
| ADI AR 2206H | <<locked>> | 80% | 50,966 psi | 82% | 2923 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,192 psi | 69% | 2762 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 46,572 psi | 75% | 2900 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,398 psi | 76% | 2976 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,352 psi | 70% | 2789 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,470 psi | 75% | 2858 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,547 psi | 54% | 2635 fps | 96.1% |
| Alliant Reloder-17 | 62.8 gr | 80% | 37,869 psi | 61% | 2769 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,977 psi | 74% | 2894 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,166 psi | 74% | 2940 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,312 psi | 47% | 2536 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,621 psi | 57% | 2720 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,171 psi | 55% | 2730 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,647 psi | 81% | 2933 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,279 psi | 69% | 2792 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 46,166 psi | 74% | 2940 fps | 95.4% |
| Bofors RP7 | <<locked>> | 84% | 43,743 psi | 70% | 2769 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 43,990 psi | 71% | 2802 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 82% | 42,148 psi | 68% | 2815 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 88% | 46,470 psi | 75% | 2858 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,547 psi | 83% | 2933 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,922 psi | 50% | 2526 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,237 psi | 73% | 2858 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 43,685 psi | 70% | 2874 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 43% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,614 psi | 73% | 2815 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 47,616 psi | 76% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,279 psi | 68% | 2736 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,742 psi | 67% | 2703 fps | 95.7% |
| IMR 4350 | <<locked>> | 86% | 41,669 psi | 67% | 2746 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,900 psi | 64% | 2687 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 31,662 psi | 51% | 2549 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 47,703 psi | 76% | 2890 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 50,807 psi | 81% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,111 psi | 80% | 2844 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,368 psi | 73% | 2799 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,376 psi | 60% | 2635 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 40,509 psi | 65% | 2723 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 38,043 psi | 61% | 2700 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,705 psi | 80% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,343 psi | 81% | 2867 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,832 psi | 73% | 2844 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,427 psi | 76% | 2897 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 42,453 psi | 68% | 2897 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 33,939 psi | 54% | 2621 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,035 psi | 74% | 2864 fps | 99.7% |
| Ramshot Grand | <<locked>> | 98% | 51,938 psi | 83% | 3051 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 84% | 37,840 psi | 61% | 2723 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 44,918 psi | 72% | 2890 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 44% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,193 psi | 71% | 2785 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,951 psi | 80% | 2976 fps | 99.8% |
| ReloadSwiss RS 60 | 62.8 gr | 80% | 40,350 psi | 65% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,547 psi | 54% | 2635 fps | 95.5% |
| ReloadSwiss RS 70 | 65.4 gr | 82% | 35,592 psi | 57% | 2707 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 47,152 psi | 76% | 2812 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,654 psi | 65% | 2733 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 51,590 psi | 83% | 2940 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 44,904 psi | 72% | 2874 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 84% | 43,743 psi | 70% | 2769 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,376 psi | 60% | 2635 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,807 psi | 81% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,368 psi | 73% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,509 psi | 65% | 2723 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,959 psi | 67% | 2789 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,677 psi | 83% | 2917 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,400 psi | 79% | 2887 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,691 psi | 81% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,612 psi | 68% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,059 psi | 63% | 2631 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,688 psi | 76% | 2930 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 50,459 psi | 81% | 2802 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,503 psi | 83% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,307 psi | 66% | 2740 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,371 psi | 49% | 2569 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 42,641 psi | 68% | 2795 fps | 95.4% |
| Unknown powder | <<locked>> | 80% | 36,869 psi | 59% | 2684 fps | 96.3% |
| Vihtavuori N133 | <<locked>> | 80% | 47,993 psi | 77% | 2743 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,268 psi | 76% | 2782 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,108 psi | 76% | 2789 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,273 psi | 57% | 2579 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 36,854 psi | 59% | 2657 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 43,250 psi | 69% | 2795 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 46,702 psi | 75% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,434 psi | 60% | 2700 fps | 97% |
| Vihtavuori N555 | <<locked>> | 84% | 30,066 psi | 48% | 2556 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,795 psi | 56% | 2598 fps | 98.5% |
| Winchester 760 | <<locked>> | 82% | 42,148 psi | 68% | 2815 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,731 psi | 44% | 2562 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,992 psi | 75% | 2874 fps | 95.4% |
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 107 powders for .300 Win. Mag. loaded with the .308 | 160gr | Peregrine VRG-3 Lever. Alliant Reloder-26 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,143 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Win. Mag. with the .308 | 160gr | Peregrine VRG-3 Lever they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.