Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 168gr | Barnes TTSX BT 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% | 51,967 psi | 85% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,954 psi | 89% | 2907 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2936 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 52,373 psi | 86% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,026 psi | 87% | 2999 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,330 psi | 88% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,665 psi | 90% | 3045 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,083 psi | 86% | 3028 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,996 psi | 85% | 3048 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,433 psi | 89% | 3038 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,737 psi | 88% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,099 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,302 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 51,619 psi | 85% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,853 psi | 88% | 3031 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,662 psi | 83% | 3025 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,732 psi | 78% | 2963 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,582 psi | 68% | 2874 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,071 psi | 90% | 3166 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,412 psi | 76% | 2943 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 54,244 psi | 89% | 2966 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,662 psi | 83% | 3025 fps | 97.6% |
| Bofors RP7 | <<locked>> | 90% | 54,099 psi | 89% | 2953 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 86% | 54,882 psi | 90% | 2986 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 52,156 psi | 86% | 2999 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 52,025 psi | 85% | 2953 fps | 97.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,737 psi | 90% | 3018 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,273 psi | 89% | 2979 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,634 psi | 86% | 2969 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,083 psi | 86% | 3031 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 59% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,693 psi | 88% | 2936 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,605 psi | 86% | 2910 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,025 psi | 85% | 2890 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 54,984 psi | 90% | 2982 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,388 psi | 86% | 2923 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 53,621 psi | 88% | 2989 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 51,967 psi | 85% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,244 psi | 89% | 2969 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 54,317 psi | 89% | 2897 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,750 psi | 87% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,388 psi | 86% | 2923 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 53,563 psi | 88% | 2963 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,901 psi | 69% | 2782 fps | 97.9% |
| Norma 201 | <<locked>> | 82% | 54,041 psi | 89% | 2917 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,781 psi | 90% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,374 psi | 88% | 2963 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,040 psi | 85% | 2979 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 54,085 psi | 89% | 3120 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 52,228 psi | 86% | 2989 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,969 psi | 89% | 2986 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,676 psi | 82% | 3009 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 94% | 54,607 psi | 90% | 3041 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,251 psi | 73% | 2881 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 60% | 1893 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,998 psi | 90% | 2969 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,998 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,940 psi | 90% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,127 psi | 87% | 3022 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,924 psi | 85% | 3054 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,567 psi | 67% | 2887 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 84% | 54,534 psi | 90% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,346 psi | 89% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,866 psi | 87% | 2956 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 52,808 psi | 87% | 3015 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 54,099 psi | 89% | 2953 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,388 psi | 86% | 2923 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 52,750 psi | 87% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,563 psi | 88% | 2963 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,605 psi | 86% | 2969 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,983 psi | 89% | 2949 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,071 psi | 90% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,576 psi | 86% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,083 psi | 86% | 2874 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,344 psi | 86% | 3009 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 54,694 psi | 90% | 2844 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,491 psi | 89% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,462 psi | 89% | 2946 fps | 96.1% |
| Somchem S365 | <<locked>> | 96% | 54,810 psi | 90% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,330 psi | 88% | 2989 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 84% | 54,984 psi | 90% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 51,909 psi | 85% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,388 psi | 86% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,331 psi | 89% | 2982 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,211 psi | 81% | 2904 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 53,519 psi | 88% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,417 psi | 88% | 2986 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,476 psi | 88% | 3041 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,549 psi | 90% | 3107 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,099 psi | 89% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,156 psi | 86% | 2999 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,091 psi | 71% | 3015 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,998 psi | 89% | 2953 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,664 psi | 88% | 2982 fps | 97.9% |
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% | 48,530 psi | 80% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,181 psi | 77% | 2792 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 33,228 psi | 55% | 2585 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 45,977 psi | 75% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,693 psi | 57% | 2641 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 44,005 psi | 72% | 2769 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 44,657 psi | 73% | 2861 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 48,660 psi | 80% | 2966 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,544 psi | 80% | 2989 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,800 psi | 69% | 2802 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,280 psi | 73% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,427 psi | 78% | 2864 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,301 psi | 56% | 2654 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,856 psi | 64% | 2789 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,150 psi | 72% | 2854 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,307 psi | 68% | 2838 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,513 psi | 44% | 2451 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,126 psi | 53% | 2631 fps | 95% |
| Alliant Reloder-26 | 67 gr | 84% | 30,298 psi | 50% | 2625 fps | 95.2% |
| Bofors RP15 | <<locked>> | 98% | 43,555 psi | 72% | 2887 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 44,251 psi | 73% | 2802 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,307 psi | 68% | 2838 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,247 psi | 64% | 2667 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 44,933 psi | 74% | 2812 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 36,898 psi | 61% | 2690 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 42,757 psi | 70% | 2779 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,111 psi | 84% | 2956 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,821 psi | 52% | 2549 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,066 psi | 81% | 2910 fps | 100% |
| Hodgdon Superformance | 67.5 gr | 82% | 38,740 psi | 64% | 2766 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 44% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,285 psi | 83% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,267 psi | 76% | 2802 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,762 psi | 80% | 2835 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 39,914 psi | 66% | 2703 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,843 psi | 67% | 2703 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 33,562 psi | 55% | 2595 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 48,660 psi | 80% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,836 psi | 83% | 2913 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 51,155 psi | 84% | 2848 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,441 psi | 76% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,145 psi | 63% | 2648 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 36,245 psi | 60% | 2621 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 34,330 psi | 56% | 2612 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 50,604 psi | 83% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,285 psi | 84% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,804 psi | 77% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,279 psi | 69% | 2792 fps | 95% |
| Norma MRP | <<locked>> | 90% | 37,840 psi | 62% | 2792 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,766 psi | 57% | 2638 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 47,123 psi | 77% | 2874 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,253 psi | 76% | 2943 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 33,779 psi | 55% | 2625 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 41,002 psi | 67% | 2812 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 45% | 1693 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,150 psi | 74% | 2795 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,126 psi | 84% | 2986 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,350 psi | 68% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,490 psi | 57% | 2657 fps | 97.1% |
| ReloadSwiss RS 70 | 63.3 gr | 80% | 33,953 psi | 56% | 2664 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,768 psi | 62% | 2812 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 48,254 psi | 79% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,611 psi | 68% | 2743 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 46,267 psi | 76% | 2838 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 43,091 psi | 71% | 2835 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 39,247 psi | 64% | 2667 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,145 psi | 63% | 2648 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 46,441 psi | 76% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,245 psi | 60% | 2621 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,946 psi | 71% | 2802 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,401 psi | 83% | 2890 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,750 psi | 85% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,555 psi | 72% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,289 psi | 61% | 2589 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,685 psi | 70% | 2828 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 51,329 psi | 84% | 2795 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,177 psi | 69% | 2746 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 50,836 psi | 83% | 2887 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 31,314 psi | 51% | 2595 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 38,130 psi | 63% | 2694 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 48,443 psi | 80% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,602 psi | 80% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,176 psi | 66% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,274 psi | 60% | 2641 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 40,263 psi | 66% | 2730 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,021 psi | 77% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,723 psi | 59% | 2644 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 28,950 psi | 48% | 2530 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 50,763 psi | 83% | 3038 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,592 psi | 58% | 2615 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 37,086 psi | 61% | 2697 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,874 psi | 41% | 2467 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,357 psi | 83% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,410 psi | 71% | 2802 fps | 95.6% |
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 | 168gr | Barnes TTSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,166 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 168.0 gr projectile in 0.308" calls for a 1:11.0 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 | 168gr | Barnes TTSX BT 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.