Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 203gr | Peregrine Plainsmaster (VLR-4) bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, 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 3100 | <<locked>> | 98% | 53,809 psi | 88% | 2733 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,549 psi | 90% | 2648 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,257 psi | 86% | 2720 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,692 psi | 85% | 2825 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 96% | 52,460 psi | 86% | 2825 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 54,955 psi | 90% | 2690 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,403 psi | 88% | 2776 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 98% | 54,694 psi | 90% | 2831 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,453 psi | 70% | 2608 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,246 psi | 61% | 2566 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,650 psi | 88% | 2772 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,489 psi | 86% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,316 psi | 88% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,578 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,924 psi | 87% | 2766 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,940 psi | 89% | 2825 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,621 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,050 psi | 77% | 2743 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,766 psi | 90% | 2884 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,866 psi | 87% | 2808 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 52,823 psi | 87% | 2674 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,844 psi | 70% | 2671 fps | 97.1% |
| Bofors RP5 | <<locked>> | 98% | 53,940 psi | 89% | 2825 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 52,388 psi | 86% | 2674 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2690 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 53,316 psi | 88% | 2697 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,418 psi | 89% | 2776 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 54,056 psi | 89% | 2736 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 54,810 psi | 90% | 2772 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,534 psi | 88% | 2753 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,679 psi | 88% | 2700 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,137 psi | 76% | 2795 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 88% | 54,665 psi | 90% | 2815 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 60% | 1677 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,346 psi | 89% | 2671 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,751 psi | 88% | 2713 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,085 psi | 89% | 2700 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 52,881 psi | 87% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,794 psi | 87% | 2707 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 52,112 psi | 86% | 2802 fps | 98.4% |
| Lovex S062 | <<locked>> | 82% | 54,447 psi | 89% | 2661 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,157 psi | 89% | 2694 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,185 psi | 86% | 2690 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,950 psi | 79% | 2648 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 54,346 psi | 89% | 2766 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 53,592 psi | 88% | 2848 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 54,665 psi | 90% | 2756 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,388 psi | 86% | 2822 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 53,476 psi | 88% | 2766 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,372 psi | 83% | 2759 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 61% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,287 psi | 87% | 2687 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,056 psi | 89% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,272 psi | 86% | 2746 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,389 psi | 89% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,224 psi | 76% | 2792 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 53,200 psi | 87% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,926 psi | 90% | 2743 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 94% | 51,967 psi | 85% | 2746 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 52,388 psi | 86% | 2674 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,157 psi | 89% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,447 psi | 89% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,185 psi | 86% | 2690 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,868 psi | 90% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,114 psi | 89% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,621 psi | 88% | 2651 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,517 psi | 85% | 2743 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 53,069 psi | 87% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,881 psi | 87% | 2684 fps | 97.7% |
| Somchem S365 | <<locked>> | 92% | 54,418 psi | 89% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,620 psi | 86% | 2726 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 54,418 psi | 89% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,185 psi | 87% | 2703 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 51,982 psi | 85% | 2703 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 52,141 psi | 86% | 2707 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,243 psi | 87% | 2769 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,780 psi | 88% | 2844 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,124 psi | 81% | 2756 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,678 psi | 86% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,679 psi | 90% | 2779 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,446 psi | 86% | 2720 fps | 99.1% |
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 3100 | <<locked>> | 80% | 28,892 psi | 47% | 2260 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 51,184 psi | 84% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,566 psi | 65% | 2510 fps | 99.7% |
| Accurate High Country | 63.9 gr | 86% | 38,798 psi | 64% | 2585 fps | 95.4% |
| Accurate MAGPRO | 68.2 gr | 90% | 42,366 psi | 70% | 2644 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,472 psi | 80% | 2595 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 35,853 psi | 59% | 2444 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 41,611 psi | 68% | 2598 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 39,552 psi | 65% | 2546 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 32,837 psi | 54% | 2451 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 35,984 psi | 59% | 2444 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,240 psi | 81% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,479 psi | 63% | 2523 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,005 psi | 72% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,650 psi | 59% | 2441 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,795 psi | 59% | 2487 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,021 psi | 46% | 2293 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 27,992 psi | 46% | 2306 fps | 95.6% |
| Alliant Reloder-26 | 61.3 gr | 80% | 30,139 psi | 49% | 2411 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 35,491 psi | 58% | 2480 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 49,516 psi | 81% | 2628 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,507 psi | 62% | 2559 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 35,795 psi | 59% | 2487 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 43,294 psi | 71% | 2520 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 38,014 psi | 62% | 2516 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 49,792 psi | 82% | 2644 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,669 psi | 68% | 2559 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,527 psi | 73% | 2575 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 41,698 psi | 68% | 2549 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,700 psi | 72% | 2589 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,969 psi | 59% | 2411 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,476 psi | 58% | 2552 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 40,553 psi | 67% | 2575 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 45% | 1496 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,966 psi | 84% | 2621 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,073 psi | 64% | 2457 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,860 psi | 74% | 2546 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 37,942 psi | 62% | 2464 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 40,901 psi | 67% | 2497 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 39,827 psi | 65% | 2572 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 51,111 psi | 84% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,148 psi | 69% | 2497 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 40,538 psi | 67% | 2487 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 28,340 psi | 47% | 2244 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 38,464 psi | 63% | 2484 fps | 96% |
| Norma MRP | <<locked>> | 82% | 32,474 psi | 53% | 2434 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,392 psi | 65% | 2503 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 39,247 psi | 64% | 2572 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,072 psi | 63% | 2493 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 90% | 34,838 psi | 57% | 2461 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 46% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,864 psi | 82% | 2635 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,804 psi | 77% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,421 psi | 65% | 2530 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,116 psi | 63% | 2543 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,285 psi | 53% | 2467 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 46,673 psi | 77% | 2579 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 39,827 psi | 65% | 2480 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 34,766 psi | 57% | 2421 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,294 psi | 71% | 2520 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,148 psi | 69% | 2497 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 51,111 psi | 84% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,538 psi | 67% | 2487 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,906 psi | 79% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,790 psi | 78% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,278 psi | 68% | 2448 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 34,432 psi | 57% | 2418 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,746 psi | 77% | 2575 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,366 psi | 71% | 2526 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 35,897 psi | 59% | 2464 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 32,967 psi | 54% | 2352 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 44,831 psi | 74% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,799 psi | 67% | 2500 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 86% | 34,867 psi | 57% | 2392 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 40,074 psi | 66% | 2503 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 31,241 psi | 51% | 2365 fps | 98.7% |
| Vihtavuori N560 | <<locked>> | 88% | 40,640 psi | 67% | 2605 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 39,871 psi | 65% | 2585 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,726 psi | 65% | 2467 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,669 psi | 68% | 2559 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,613 psi | 40% | 2283 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,072 psi | 61% | 2448 fps | 95.8% |
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 82 powders for .300 Blaser Mag. loaded with the .308 | 203gr | Peregrine Plainsmaster (VLR-4). Alliant Reloder-26 delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,884 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 203.0 gr projectile in 0.308" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Accurate MAGPRO, Alliant Reloder-26, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 203gr | Peregrine Plainsmaster (VLR-4) 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.