Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 166gr | Peregrine Glider (Glider Tactical) 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-26 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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 51,547 psi | 85% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,708 psi | 88% | 2920 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,488 psi | 83% | 2953 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 52,112 psi | 86% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,721 psi | 87% | 3012 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 51,822 psi | 85% | 3097 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 86% | 53,142 psi | 87% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,317 psi | 89% | 3058 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,967 psi | 85% | 3045 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,953 psi | 85% | 3064 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,288 psi | 89% | 3054 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,505 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,896 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,969 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 51,285 psi | 84% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,519 psi | 88% | 3045 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,502 psi | 83% | 3041 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,630 psi | 78% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,466 psi | 68% | 2887 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,839 psi | 90% | 3179 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,282 psi | 76% | 2956 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 53,983 psi | 89% | 2979 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,502 psi | 83% | 3041 fps | 97.5% |
| Bofors RP7 | <<locked>> | 90% | 53,838 psi | 88% | 2966 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 54,621 psi | 90% | 2999 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 51,822 psi | 85% | 3012 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 51,996 psi | 85% | 2972 fps | 97.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,621 psi | 90% | 3031 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,201 psi | 89% | 2995 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,388 psi | 86% | 2986 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 51,692 psi | 85% | 3041 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 59% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,519 psi | 88% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,388 psi | 86% | 2923 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 51,851 psi | 85% | 2907 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,708 psi | 90% | 2999 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,388 psi | 86% | 2943 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 53,548 psi | 88% | 3009 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 51,779 psi | 85% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,925 psi | 89% | 2982 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 54,172 psi | 89% | 2913 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,576 psi | 86% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,156 psi | 86% | 2936 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 53,272 psi | 87% | 2979 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,626 psi | 68% | 2792 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 53,635 psi | 88% | 2930 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,592 psi | 90% | 2930 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,156 psi | 87% | 2979 fps | 100% |
| Norma 204 | <<locked>> | 92% | 51,953 psi | 85% | 2992 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 53,606 psi | 88% | 3130 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 51,924 psi | 85% | 2999 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,737 psi | 88% | 3002 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,273 psi | 89% | 3058 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,845 psi | 72% | 2887 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,723 psi | 90% | 2982 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,752 psi | 90% | 3061 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,607 psi | 90% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,779 psi | 87% | 3035 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,576 psi | 85% | 3064 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,422 psi | 66% | 2897 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 84% | 54,375 psi | 89% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,085 psi | 89% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,533 psi | 86% | 2969 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 52,475 psi | 86% | 3025 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 53,838 psi | 88% | 2966 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,156 psi | 86% | 2936 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 52,576 psi | 86% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,272 psi | 87% | 2979 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,330 psi | 86% | 2986 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,780 psi | 88% | 2963 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,723 psi | 90% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,417 psi | 86% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 51,822 psi | 85% | 2884 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,996 psi | 85% | 3018 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 54,317 psi | 89% | 2858 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,259 psi | 89% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,331 psi | 89% | 2963 fps | 96% |
| Somchem S365 | <<locked>> | 96% | 54,389 psi | 89% | 3054 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,214 psi | 87% | 3002 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 84% | 54,563 psi | 90% | 2887 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 51,750 psi | 85% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,141 psi | 86% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,998 psi | 89% | 2992 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,095 psi | 81% | 2917 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 53,301 psi | 88% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,069 psi | 87% | 2999 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,098 psi | 87% | 3054 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,099 psi | 89% | 3117 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,737 psi | 88% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,054 psi | 85% | 3015 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,757 psi | 70% | 3025 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,766 psi | 88% | 2969 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,548 psi | 88% | 2995 fps | 97.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,341 psi | 79% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,007 psi | 77% | 2805 fps | 97.2% |
| Accurate 3100 | <<locked>> | 90% | 35,462 psi | 58% | 2657 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 45,818 psi | 75% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,519 psi | 57% | 2651 fps | 97.3% |
| Accurate High Country | <<locked>> | 96% | 48,095 psi | 79% | 3031 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 43,888 psi | 72% | 2782 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 44,396 psi | 73% | 2874 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 48,544 psi | 80% | 2979 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,312 psi | 79% | 3002 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,469 psi | 73% | 2874 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,092 psi | 72% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,268 psi | 78% | 2881 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,156 psi | 56% | 2667 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,667 psi | 63% | 2802 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,932 psi | 72% | 2867 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,234 psi | 68% | 2854 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,295 psi | 43% | 2457 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,084 psi | 56% | 2700 fps | 95.9% |
| Alliant Reloder-26 | 67.4 gr | 84% | 30,255 psi | 50% | 2638 fps | 95% |
| Bofors RP15 | <<locked>> | 98% | 43,279 psi | 71% | 2897 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,092 psi | 72% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,234 psi | 68% | 2854 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 39,131 psi | 64% | 2680 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 44,773 psi | 74% | 2828 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 36,738 psi | 60% | 2703 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 82% | 42,598 psi | 70% | 2792 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,981 psi | 84% | 2969 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,546 psi | 52% | 2556 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,805 psi | 80% | 2927 fps | 100% |
| Hodgdon Superformance | 67.8 gr | 82% | 38,508 psi | 63% | 2776 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 44% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,140 psi | 82% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,108 psi | 76% | 2818 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,617 psi | 80% | 2851 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 39,740 psi | 65% | 2713 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,698 psi | 67% | 2717 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 33,402 psi | 55% | 2608 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 48,501 psi | 80% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,546 psi | 83% | 2923 fps | 95.4% |
| Lovex S060 | <<locked>> | 80% | 50,821 psi | 83% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,093 psi | 76% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,000 psi | 62% | 2661 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,143 psi | 59% | 2635 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 34,142 psi | 56% | 2625 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 50,459 psi | 83% | 2881 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,126 psi | 84% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,601 psi | 77% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 88% | 45,179 psi | 74% | 2867 fps | 95.7% |
| Norma MRP | <<locked>> | 90% | 37,594 psi | 62% | 2802 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,621 psi | 57% | 2651 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,905 psi | 77% | 2887 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,129 psi | 59% | 2697 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 98% | 40,669 psi | 67% | 2822 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,976 psi | 74% | 2812 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,908 psi | 84% | 2999 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,162 psi | 68% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,316 psi | 56% | 2671 fps | 96.9% |
| ReloadSwiss RS 70 | 63.6 gr | 80% | 33,794 psi | 55% | 2677 fps | 96.1% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,652 psi | 62% | 2825 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 47,906 psi | 79% | 2828 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,423 psi | 68% | 2756 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,168 psi | 81% | 2910 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 42,859 psi | 70% | 2844 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,131 psi | 64% | 2680 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,000 psi | 62% | 2661 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 46,093 psi | 76% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,143 psi | 59% | 2635 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,772 psi | 70% | 2815 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,212 psi | 82% | 2907 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,372 psi | 84% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,265 psi | 71% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,173 psi | 61% | 2602 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,453 psi | 70% | 2841 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,169 psi | 84% | 2812 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,061 psi | 69% | 2762 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 50,734 psi | 83% | 2900 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 31,009 psi | 51% | 2602 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,712 psi | 67% | 2769 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 48,037 psi | 79% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,472 psi | 80% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,030 psi | 66% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,129 psi | 59% | 2657 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,030 psi | 66% | 2743 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 46,862 psi | 77% | 2802 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,578 psi | 58% | 2654 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 28,805 psi | 47% | 2539 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 98% | 50,589 psi | 83% | 3054 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,433 psi | 58% | 2625 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 36,883 psi | 61% | 2707 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,397 psi | 43% | 2546 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,154 psi | 82% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,149 psi | 71% | 2812 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 94 powders for .300 Blaser Mag. loaded with the .308 | 166gr | Peregrine Glider (Glider Tactical). Alliant Reloder-26 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,179 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 (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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-26, Hodgdon Superformance rank at the top here: for .300 Blaser Mag. with the .308 | 166gr | Peregrine Glider (Glider Tactical) 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.