Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 165gr | Peregrine Bushmaster (VRG-3) bullet and 94 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-16 and Alliant Reloder-26.
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% | 55,564 psi | 89% | 2864 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,983 psi | 87% | 2884 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2913 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 56,043 psi | 90% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,316 psi | 85% | 2972 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,101 psi | 90% | 3120 fps | 97% |
| ADI AR 2206H | <<locked>> | 82% | 55,535 psi | 89% | 2956 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,417 psi | 86% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,839 psi | 88% | 3018 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,231 psi | 90% | 3087 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,810 psi | 88% | 3012 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,838 psi | 86% | 2930 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,201 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,302 psi | 87% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,753 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,041 psi | 87% | 3005 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,010 psi | 82% | 2995 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,167 psi | 77% | 2940 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,887 psi | 67% | 2844 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,405 psi | 89% | 3136 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,709 psi | 89% | 2976 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 54,578 psi | 88% | 2946 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,010 psi | 82% | 2995 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,143 psi | 87% | 2923 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 55,172 psi | 88% | 2963 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,927 psi | 90% | 3031 fps | 99% |
| Hodgdon H4350 | <<locked>> | 90% | 55,782 psi | 89% | 2989 fps | 98% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,362 psi | 90% | 3012 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,202 psi | 90% | 2966 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,534 psi | 87% | 2956 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,750 psi | 85% | 2946 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,199 psi | 84% | 3002 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 58% | 1847 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,838 psi | 86% | 2913 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,260 psi | 90% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,535 psi | 89% | 2927 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 55,187 psi | 88% | 2959 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,101 psi | 90% | 2959 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 53,853 psi | 86% | 2966 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,637 psi | 89% | 2982 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,898 psi | 90% | 2927 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,476 psi | 87% | 2877 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,173 psi | 90% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,869 psi | 90% | 2953 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 53,534 psi | 86% | 2936 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,090 psi | 67% | 2753 fps | 97.3% |
| Norma 201 | <<locked>> | 82% | 54,201 psi | 87% | 2897 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,940 psi | 88% | 2894 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,490 psi | 86% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,086 psi | 90% | 3015 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,143 psi | 87% | 3084 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,840 psi | 90% | 3015 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,273 psi | 87% | 2963 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,810 psi | 88% | 3015 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 59% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,259 psi | 89% | 2946 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,143 psi | 88% | 3022 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,216 psi | 89% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,301 psi | 85% | 2999 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,927 psi | 90% | 3087 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,694 psi | 88% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,694 psi | 88% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,420 psi | 90% | 2986 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 52,968 psi | 85% | 2986 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,143 psi | 87% | 2923 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,869 psi | 90% | 2953 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,898 psi | 90% | 2927 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,173 psi | 90% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,534 psi | 86% | 2936 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,420 psi | 90% | 3002 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,056 psi | 87% | 2927 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,042 psi | 88% | 2828 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,086 psi | 90% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,666 psi | 89% | 2904 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3041 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 54,853 psi | 88% | 2828 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,795 psi | 88% | 2940 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,027 psi | 88% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,751 psi | 86% | 2963 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,579 psi | 89% | 2812 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,172 psi | 88% | 2858 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,535 psi | 89% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,260 psi | 90% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,592 psi | 88% | 2959 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,588 psi | 80% | 2877 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 53,809 psi | 86% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,621 psi | 86% | 2959 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,708 psi | 86% | 3015 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 3071 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,230 psi | 87% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,173 psi | 90% | 3035 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,192 psi | 69% | 2982 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,041 psi | 87% | 2933 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2959 fps | 97.4% |
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% | 48,704 psi | 78% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,253 psi | 76% | 2766 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 35,882 psi | 58% | 2615 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 46,166 psi | 74% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,853 psi | 56% | 2612 fps | 96.8% |
| Accurate High Country | <<locked>> | 96% | 48,631 psi | 78% | 2986 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 52,112 psi | 84% | 2900 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,179 psi | 71% | 2743 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 44,831 psi | 72% | 2835 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,660 psi | 78% | 2959 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,904 psi | 72% | 2831 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,411 psi | 71% | 2769 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,587 psi | 76% | 2838 fps | 99.8% |
| Alliant Reloder-16 | 58.4 gr | 80% | 34,418 psi | 55% | 2625 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,943 psi | 62% | 2759 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,367 psi | 71% | 2825 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,585 psi | 71% | 2874 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,340 psi | 45% | 2474 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,447 psi | 55% | 2657 fps | 95.2% |
| Alliant Reloder-26 | 69.3 gr | 86% | 32,764 psi | 53% | 2657 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,069 psi | 83% | 2917 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 44,411 psi | 71% | 2776 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,585 psi | 71% | 2874 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 42,090 psi | 67% | 2700 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,063 psi | 72% | 2785 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 39,784 psi | 64% | 2726 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 43,047 psi | 69% | 2753 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 98% | 52,634 psi | 84% | 2949 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,678 psi | 84% | 2910 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,821 psi | 51% | 2516 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,385 psi | 79% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,785 psi | 67% | 2799 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 43% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,444 psi | 81% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,412 psi | 74% | 2779 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,892 psi | 78% | 2812 fps | 97.9% |
| IMR 4350 | <<locked>> | 86% | 42,685 psi | 68% | 2733 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,988 psi | 66% | 2677 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,678 psi | 54% | 2566 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 48,820 psi | 78% | 2867 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,083 psi | 84% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,343 psi | 82% | 2828 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,630 psi | 75% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,261 psi | 61% | 2621 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 38,870 psi | 62% | 2651 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 36,898 psi | 59% | 2641 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,807 psi | 81% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,474 psi | 83% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,963 psi | 75% | 2825 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,469 psi | 73% | 2825 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 40,843 psi | 65% | 2825 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,925 psi | 56% | 2612 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,239 psi | 76% | 2848 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,390 psi | 58% | 2654 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 44% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,237 psi | 73% | 2769 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,285 psi | 82% | 2959 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,466 psi | 66% | 2822 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,766 psi | 56% | 2628 fps | 96.4% |
| ReloadSwiss RS 70 | 63.9 gr | 80% | 34,040 psi | 55% | 2631 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 48,225 psi | 77% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,742 psi | 67% | 2717 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,676 psi | 80% | 2871 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 43,337 psi | 69% | 2805 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 42,090 psi | 67% | 2700 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,261 psi | 61% | 2621 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,083 psi | 84% | 2871 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,630 psi | 75% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,870 psi | 62% | 2651 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,062 psi | 69% | 2772 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,502 psi | 81% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,706 psi | 83% | 2779 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,555 psi | 70% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,987 psi | 64% | 2618 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,788 psi | 73% | 2858 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 51,517 psi | 83% | 2779 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,366 psi | 68% | 2723 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,459 psi | 50% | 2562 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 41,002 psi | 66% | 2726 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,286 psi | 84% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,414 psi | 78% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,776 psi | 78% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,335 psi | 65% | 2651 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,419 psi | 58% | 2615 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 43,279 psi | 69% | 2762 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,181 psi | 76% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,868 psi | 58% | 2612 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 29,080 psi | 47% | 2493 fps | 95% |
| Vihtavuori N560 | <<locked>> | 98% | 51,068 psi | 82% | 3012 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,795 psi | 57% | 2589 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 39,987 psi | 64% | 2730 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,731 psi | 43% | 2497 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,444 psi | 81% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,746 psi | 75% | 2831 fps | 95.7% |
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 94 powders for .300 Win. Mag. loaded with the .308 | 165gr | Peregrine Bushmaster (VRG-3). Alliant Reloder-26 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,136 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 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 165.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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-16, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 165gr | Peregrine Bushmaster (VRG-3) 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.