Load Specifications
Load data in caliber .300 Blaser Mag. with .310 | 200gr | Rhino Penetrator bullet and 81 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% | 54,650 psi | 90% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,055 psi | 87% | 2743 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,982 psi | 85% | 2844 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 52,982 psi | 87% | 2844 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 52,025 psi | 85% | 2661 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,780 psi | 88% | 2792 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 98% | 54,868 psi | 90% | 2844 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,815 psi | 70% | 2621 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,898 psi | 62% | 2585 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,809 psi | 88% | 2785 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,765 psi | 87% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,708 psi | 88% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,766 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,142 psi | 87% | 2779 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,172 psi | 89% | 2841 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,085 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,572 psi | 78% | 2766 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,111 psi | 84% | 2848 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,098 psi | 87% | 2822 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 53,548 psi | 88% | 2697 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,497 psi | 71% | 2694 fps | 97% |
| Bofors RP5 | <<locked>> | 98% | 54,172 psi | 89% | 2841 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 52,924 psi | 87% | 2694 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,152 psi | 77% | 2710 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 82% | 53,925 psi | 89% | 2720 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,911 psi | 90% | 2795 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 54,462 psi | 89% | 2753 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 54,969 psi | 90% | 2789 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,940 psi | 89% | 2772 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,128 psi | 89% | 2720 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,688 psi | 77% | 2815 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 88% | 55,071 psi | 90% | 2831 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1690 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,752 psi | 90% | 2690 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,940 psi | 89% | 2726 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,447 psi | 89% | 2717 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 53,490 psi | 88% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,185 psi | 87% | 2723 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 52,576 psi | 86% | 2822 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 55,042 psi | 90% | 2680 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,752 psi | 90% | 2713 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,837 psi | 87% | 2710 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,530 psi | 80% | 2667 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 54,781 psi | 90% | 2782 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 53,809 psi | 88% | 2864 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 51,764 psi | 85% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,837 psi | 87% | 2838 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 53,969 psi | 89% | 2785 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,691 psi | 83% | 2772 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 61% | 1729 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,548 psi | 88% | 2703 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,215 psi | 89% | 2799 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,866 psi | 87% | 2766 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,810 psi | 90% | 2848 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2808 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 53,896 psi | 88% | 2697 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 51,938 psi | 85% | 2710 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 52,475 psi | 86% | 2769 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 52,924 psi | 87% | 2694 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,752 psi | 90% | 2713 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,042 psi | 90% | 2680 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,837 psi | 87% | 2710 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 51,779 psi | 85% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,549 psi | 90% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,230 psi | 89% | 2671 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,025 psi | 85% | 2762 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 53,693 psi | 88% | 2690 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,388 psi | 88% | 2703 fps | 97.6% |
| Somchem S365 | <<locked>> | 92% | 54,955 psi | 90% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,229 psi | 87% | 2746 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 54,969 psi | 90% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,679 psi | 88% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,475 psi | 86% | 2723 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 52,678 psi | 86% | 2726 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,969 psi | 89% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,983 psi | 89% | 2858 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,588 psi | 81% | 2776 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,866 psi | 87% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 51,547 psi | 85% | 2743 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,879 psi | 84% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,939 psi | 87% | 2736 fps | 99% |
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% | 29,805 psi | 49% | 2290 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 40,393 psi | 66% | 2533 fps | 99.7% |
| Accurate High Country | 63.8 gr | 86% | 39,436 psi | 65% | 2608 fps | 95.3% |
| Accurate MAGPRO | 69.5 gr | 92% | 45,876 psi | 75% | 2723 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 48,878 psi | 80% | 2615 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,390 psi | 60% | 2464 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 42,163 psi | 69% | 2618 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 40,132 psi | 66% | 2566 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 33,359 psi | 55% | 2470 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,564 psi | 60% | 2467 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,588 psi | 81% | 2635 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,986 psi | 64% | 2543 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,512 psi | 73% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,216 psi | 59% | 2461 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,434 psi | 60% | 2510 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,718 psi | 47% | 2320 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,689 psi | 47% | 2333 fps | 95.7% |
| Alliant Reloder-26 | 61.1 gr | 80% | 30,763 psi | 51% | 2434 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 36,129 psi | 59% | 2500 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 50,241 psi | 82% | 2648 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 38,232 psi | 63% | 2585 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 36,434 psi | 60% | 2510 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,903 psi | 72% | 2539 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 38,595 psi | 63% | 2536 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,415 psi | 83% | 2664 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,235 psi | 69% | 2579 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,991 psi | 74% | 2592 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 42,235 psi | 69% | 2569 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,179 psi | 73% | 2605 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,564 psi | 60% | 2434 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,114 psi | 59% | 2575 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 41,118 psi | 68% | 2595 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 45% | 1509 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,445 psi | 84% | 2641 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,581 psi | 65% | 2474 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,324 psi | 74% | 2566 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 38,609 psi | 63% | 2484 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,048 psi | 72% | 2566 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 90% | 40,364 psi | 66% | 2592 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 51,721 psi | 85% | 2635 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,801 psi | 70% | 2516 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 41,220 psi | 68% | 2507 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 29,254 psi | 48% | 2274 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 39,015 psi | 64% | 2500 fps | 96% |
| Norma MRP | <<locked>> | 82% | 33,156 psi | 54% | 2461 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,001 psi | 66% | 2526 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 39,827 psi | 65% | 2595 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,624 psi | 63% | 2516 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 90% | 35,375 psi | 58% | 2480 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 46% | 1542 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,357 psi | 83% | 2654 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,253 psi | 78% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,103 psi | 66% | 2552 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,653 psi | 63% | 2566 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,996 psi | 54% | 2493 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 47,413 psi | 78% | 2602 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,350 psi | 66% | 2500 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 35,418 psi | 58% | 2448 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,903 psi | 72% | 2539 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,801 psi | 70% | 2516 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 51,721 psi | 85% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,220 psi | 68% | 2507 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,428 psi | 80% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,225 psi | 79% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,959 psi | 69% | 2467 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,085 psi | 58% | 2441 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 47,369 psi | 78% | 2595 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,714 psi | 72% | 2543 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,550 psi | 60% | 2487 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,678 psi | 55% | 2379 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 45,440 psi | 75% | 2530 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,365 psi | 68% | 2523 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 35,302 psi | 58% | 2411 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 40,712 psi | 67% | 2523 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,053 psi | 53% | 2392 fps | 98.7% |
| Vihtavuori N560 | <<locked>> | 88% | 41,220 psi | 68% | 2625 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 40,422 psi | 66% | 2605 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,248 psi | 66% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,235 psi | 69% | 2579 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,411 psi | 42% | 2316 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,507 psi | 62% | 2464 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 81 powders for .300 Blaser Mag. loaded with the .310 | 200gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 2,890 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,890 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 200.0 gr projectile in 0.31" calls for a 1:10.0 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 .310 | 200gr | Rhino Penetrator 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.