Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 176gr | Peregrine Glider (Glider GRM) 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-26 and Accurate High Country.
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% | 52,576 psi | 86% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,462 psi | 89% | 2851 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,590 psi | 85% | 2890 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 53,258 psi | 87% | 2835 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,969 psi | 89% | 2943 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 53,069 psi | 87% | 3038 fps | 97.5% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,925 psi | 89% | 3035 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 53,969 psi | 89% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,706 psi | 85% | 2930 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,968 psi | 87% | 2982 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,910 psi | 87% | 2995 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,808 psi | 85% | 2930 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,462 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,781 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,114 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,504 psi | 86% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,636 psi | 90% | 2979 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,634 psi | 85% | 2979 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,573 psi | 80% | 2910 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,279 psi | 69% | 2831 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 51,996 psi | 85% | 3048 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,195 psi | 77% | 2897 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 51,721 psi | 85% | 2858 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,634 psi | 85% | 2979 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 54,665 psi | 90% | 2897 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 52,112 psi | 86% | 2874 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 52,968 psi | 87% | 2946 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 52,895 psi | 87% | 2904 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 53,113 psi | 87% | 2927 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,880 psi | 85% | 2907 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 51,692 psi | 85% | 2871 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,417 psi | 88% | 2910 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,408 psi | 68% | 2854 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 90% | 52,997 psi | 87% | 2982 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 59% | 1801 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,273 psi | 89% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,374 psi | 88% | 2854 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,562 psi | 86% | 2835 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 52,286 psi | 86% | 2874 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,127 psi | 87% | 2871 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 54,520 psi | 90% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 52,605 psi | 86% | 2890 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,926 psi | 90% | 2920 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,270 psi | 83% | 2949 fps | 96.5% |
| Lovex S060 | <<locked>> | 82% | 55,013 psi | 90% | 2841 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,359 psi | 88% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,953 psi | 87% | 2867 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 54,259 psi | 89% | 2910 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,757 psi | 70% | 2736 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 54,578 psi | 90% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,070 psi | 89% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,910 psi | 87% | 2927 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 54,969 psi | 90% | 3064 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 53,011 psi | 87% | 2933 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,926 psi | 90% | 2930 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2966 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 51,822 psi | 85% | 2930 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,005 psi | 74% | 2838 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,825 psi | 60% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,127 psi | 86% | 2858 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,112 psi | 86% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,954 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,707 psi | 87% | 2999 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,321 psi | 68% | 2851 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 82% | 52,011 psi | 85% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 51,808 psi | 85% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,476 psi | 88% | 2904 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 53,650 psi | 88% | 2963 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,665 psi | 90% | 2897 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,953 psi | 87% | 2867 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 53,359 psi | 88% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,259 psi | 89% | 2910 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,505 psi | 88% | 2917 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,665 psi | 90% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,113 psi | 87% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,678 psi | 86% | 2818 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,171 psi | 87% | 2956 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 51,953 psi | 85% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 51,619 psi | 85% | 2838 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 52,040 psi | 85% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,172 psi | 89% | 2936 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 52,315 psi | 86% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,707 psi | 87% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,171 psi | 87% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 51,735 psi | 85% | 2874 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,053 psi | 82% | 2854 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,230 psi | 89% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,273 psi | 89% | 2930 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,447 psi | 89% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 51,692 psi | 85% | 2992 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,897 psi | 90% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,968 psi | 87% | 2946 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,816 psi | 72% | 2969 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,752 psi | 90% | 2897 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,636 psi | 90% | 2933 fps | 98.3% |
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% | 49,269 psi | 81% | 2730 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,732 psi | 78% | 2740 fps | 97.8% |
| Accurate 3100 | <<locked>> | 88% | 33,939 psi | 56% | 2549 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 46,717 psi | 77% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,404 psi | 58% | 2598 fps | 98.1% |
| Accurate High Country | 71.3 gr | 94% | 45,847 psi | 75% | 2907 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 98% | 50,256 psi | 83% | 2972 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 44,773 psi | 74% | 2720 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,496 psi | 70% | 2756 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 46,325 psi | 76% | 2858 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,356 psi | 81% | 2933 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,598 psi | 70% | 2759 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,918 psi | 74% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,153 psi | 79% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,983 psi | 57% | 2615 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,465 psi | 65% | 2740 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,105 psi | 69% | 2749 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,119 psi | 69% | 2799 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,237 psi | 41% | 2356 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,619 psi | 54% | 2592 fps | 95.9% |
| Alliant Reloder-26 | 65.7 gr | 84% | 30,966 psi | 51% | 2592 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 41,495 psi | 68% | 2782 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 45,020 psi | 74% | 2749 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,119 psi | 69% | 2799 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 39,798 psi | 65% | 2621 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 45,498 psi | 75% | 2759 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,594 psi | 62% | 2648 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 40,669 psi | 67% | 2674 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 96% | 49,516 psi | 81% | 2864 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,646 psi | 80% | 2848 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,372 psi | 53% | 2507 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,951 psi | 82% | 2858 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,870 psi | 64% | 2792 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 36,593 psi | 60% | 2654 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 44% | 1611 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,981 psi | 84% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,065 psi | 77% | 2749 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,458 psi | 81% | 2782 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 37,985 psi | 62% | 2602 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,408 psi | 68% | 2654 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 34,171 psi | 56% | 2552 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 49,414 psi | 81% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,385 psi | 79% | 2808 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 47,108 psi | 77% | 2890 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 51,750 psi | 85% | 2789 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,065 psi | 77% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,682 psi | 64% | 2602 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 37,014 psi | 61% | 2582 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 32,808 psi | 54% | 2520 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 51,300 psi | 84% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,529 psi | 78% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,047 psi | 71% | 2749 fps | 95.7% |
| Norma MRP | <<locked>> | 88% | 35,998 psi | 59% | 2687 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,549 psi | 58% | 2598 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 47,834 psi | 79% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,123 psi | 77% | 2900 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 34,447 psi | 57% | 2582 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 38,740 psi | 64% | 2707 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 45% | 1650 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,701 psi | 75% | 2743 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,003 psi | 69% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,273 psi | 58% | 2618 fps | 97.7% |
| ReloadSwiss RS 70 | 62 gr | 80% | 34,490 psi | 57% | 2625 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,377 psi | 63% | 2779 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 48,849 psi | 80% | 2759 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,467 psi | 70% | 2697 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,123 psi | 77% | 2792 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 41,046 psi | 67% | 2730 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,798 psi | 65% | 2621 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,682 psi | 64% | 2602 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 47,065 psi | 77% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,014 psi | 61% | 2582 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,743 psi | 72% | 2753 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,213 psi | 84% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,034 psi | 72% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,855 psi | 62% | 2543 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,654 psi | 67% | 2726 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 42,801 psi | 70% | 2694 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,370 psi | 79% | 2785 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 31,937 psi | 52% | 2552 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 38,885 psi | 64% | 2654 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 49,023 psi | 80% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,516 psi | 81% | 2740 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,988 psi | 67% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,927 psi | 61% | 2598 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 38,247 psi | 63% | 2631 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 47,558 psi | 78% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,230 psi | 59% | 2595 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 27,499 psi | 45% | 2431 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 96% | 48,283 psi | 79% | 2930 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,143 psi | 59% | 2569 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,797 psi | 62% | 2654 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,699 psi | 39% | 2375 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,024 psi | 84% | 2841 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,031 psi | 67% | 2694 fps | 95.3% |
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 95 powders for .300 Blaser Mag. loaded with the .308 | 176gr | Peregrine Glider (Glider GRM). Norma MRP delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,064 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 176.0 gr projectile in 0.308" calls for a 1:10.0 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-26, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 176gr | Peregrine Glider (Glider GRM) 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.