Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 220gr | Nosler Custom Competition bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 53,563 psi | 88% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,926 psi | 90% | 2648 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 51,764 psi | 85% | 2713 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 90% | 52,185 psi | 86% | 2657 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 53,330 psi | 88% | 2713 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,645 psi | 78% | 2621 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,351 psi | 70% | 2589 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 52,547 psi | 86% | 2657 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 52,547 psi | 86% | 2657 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,388 psi | 86% | 2651 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,345 psi | 88% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 51,924 psi | 85% | 2651 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,229 psi | 87% | 2710 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,389 psi | 89% | 2680 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,417 psi | 88% | 2736 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,418 psi | 89% | 2766 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,083 psi | 86% | 2628 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 52,257 psi | 86% | 2697 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,472 psi | 81% | 2690 fps | 99.2% |
| Bofors RP5 | <<locked>> | 94% | 53,229 psi | 87% | 2710 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 54,230 psi | 89% | 2602 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,475 psi | 86% | 2700 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 53,171 psi | 87% | 2654 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 52,504 psi | 86% | 2612 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 53,447 psi | 88% | 2657 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,243 psi | 86% | 2638 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,692 psi | 87% | 2579 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,402 psi | 86% | 2808 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 53,069 psi | 87% | 2687 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,170 psi | 86% | 2592 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,214 psi | 86% | 2572 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 51,866 psi | 85% | 2595 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,505 psi | 89% | 2638 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 96% | 54,752 psi | 90% | 2746 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 37,971 psi | 62% | 2500 fps | 96.5% |
| Lovex S065 | <<locked>> | 84% | 52,910 psi | 87% | 2575 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,331 psi | 89% | 2618 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,823 psi | 87% | 2641 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 37,971 psi | 62% | 2523 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 52,910 psi | 87% | 2730 fps | 100% |
| Norma URP | <<locked>> | 86% | 53,635 psi | 88% | 2635 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 51,503 psi | 85% | 2710 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 52,388 psi | 86% | 2644 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,432 psi | 88% | 2703 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 62% | 1663 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,839 psi | 90% | 2674 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,055 psi | 87% | 2700 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,692 psi | 87% | 2805 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,747 psi | 78% | 2703 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 90% | 53,476 psi | 88% | 2628 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 92% | 54,694 psi | 90% | 2687 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 54,230 psi | 89% | 2602 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,910 psi | 87% | 2575 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,331 psi | 89% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 51,895 psi | 85% | 2530 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,259 psi | 89% | 2684 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 55,013 psi | 90% | 2589 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,810 psi | 90% | 2621 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 53,896 psi | 88% | 2638 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,114 psi | 90% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 52,837 psi | 87% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 51,909 psi | 85% | 2579 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,592 psi | 90% | 2641 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 54,462 psi | 89% | 2635 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 53,287 psi | 87% | 2657 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,881 psi | 87% | 2726 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 52,504 psi | 86% | 2710 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,124 psi | 81% | 2707 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,636 psi | 90% | 2589 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,432 psi | 88% | 2654 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 51,445 psi | 84% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,984 psi | 90% | 2657 fps | 99.8% |
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 3100 | <<locked>> | 80% | 33,547 psi | 55% | 2280 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 45,020 psi | 74% | 2503 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 39,131 psi | 64% | 2484 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 37,608 psi | 62% | 2395 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 35,810 psi | 59% | 2382 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 36,753 psi | 60% | 2405 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 28,964 psi | 48% | 2264 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,927 psi | 62% | 2398 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,927 psi | 62% | 2398 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,207 psi | 71% | 2510 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,574 psi | 81% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,579 psi | 62% | 2392 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,359 psi | 55% | 2339 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,140 psi | 53% | 2303 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,123 psi | 46% | 2228 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,867 psi | 57% | 2434 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 48,849 psi | 80% | 2575 fps | 95.7% |
| Bofors RP15 | <<locked>> | 82% | 33,257 psi | 55% | 2336 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 35,505 psi | 58% | 2425 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 33,359 psi | 55% | 2339 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 47,776 psi | 78% | 2503 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 35,114 psi | 58% | 2369 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 46,586 psi | 76% | 2549 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 49,182 psi | 81% | 2559 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 38,203 psi | 63% | 2388 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 37,521 psi | 62% | 2375 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,727 psi | 67% | 2402 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 31,140 psi | 51% | 2349 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,890 psi | 75% | 2575 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 46% | 1450 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,352 psi | 71% | 2448 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,182 psi | 81% | 2526 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 42,830 psi | 70% | 2454 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 37,637 psi | 62% | 2339 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 84% | 36,825 psi | 60% | 2418 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 35,650 psi | 59% | 2448 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 46,702 psi | 77% | 2480 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,150 psi | 74% | 2477 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 28,921 psi | 47% | 2169 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 43,192 psi | 71% | 2484 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 29,385 psi | 48% | 2310 fps | 95.3% |
| Norma MRP | 60.6 gr | 80% | 34,780 psi | 57% | 2402 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 44,266 psi | 73% | 2493 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 36,245 psi | 60% | 2421 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,989 psi | 71% | 2490 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 30,008 psi | 49% | 2254 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 47% | 1490 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,889 psi | 74% | 2526 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,018 psi | 71% | 2543 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,095 psi | 49% | 2326 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 38,218 psi | 63% | 2516 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 39,015 psi | 64% | 2375 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 36,796 psi | 60% | 2375 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,776 psi | 78% | 2503 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,702 psi | 77% | 2480 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,150 psi | 74% | 2477 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,672 psi | 75% | 2434 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,477 psi | 60% | 2369 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 51,764 psi | 85% | 2543 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 39,566 psi | 65% | 2365 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 41,147 psi | 68% | 2451 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,420 psi | 61% | 2362 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 49,661 psi | 82% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,614 psi | 75% | 2484 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,401 psi | 53% | 2247 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 45,034 psi | 74% | 2490 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,201 psi | 59% | 2375 fps | 99.9% |
| Vihtavuori N560 | 62.1 gr | 82% | 37,565 psi | 62% | 2448 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 37,449 psi | 61% | 2438 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 42,627 psi | 70% | 2589 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,469 psi | 73% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,804 psi | 77% | 2552 fps | 99.8% |
| Winchester StaBALL HD | 60 gr | 80% | 28,558 psi | 47% | 2333 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,069 psi | 56% | 2290 fps | 96% |
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 74 powders for .300 Blaser Mag. loaded with the .308 | 220gr | Nosler Custom Competition. Hodgdon Retumbo delivers the highest muzzle velocity at 2,808 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,808 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 220gr | Nosler Custom Competition 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.