Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 230gr | Berger Hybrid OTM Tactical bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Accurate High Country and Ramshot Grand.
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% | 54,578 psi | 90% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,692 psi | 87% | 2556 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 52,446 psi | 86% | 2674 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 53,243 psi | 87% | 2677 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 90% | 53,214 psi | 87% | 2612 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,563 psi | 90% | 2674 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,892 psi | 80% | 2585 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,410 psi | 71% | 2556 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,592 psi | 88% | 2605 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,418 psi | 89% | 2615 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,968 psi | 87% | 2605 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,592 psi | 90% | 2671 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,286 psi | 86% | 2589 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,737 psi | 90% | 2694 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,011 psi | 85% | 2671 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,910 psi | 87% | 2589 fps | 97.2% |
| Bofors RP15 | <<locked>> | 96% | 53,519 psi | 88% | 2654 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,749 psi | 83% | 2648 fps | 99.5% |
| Bofors RP5 | <<locked>> | 94% | 54,592 psi | 90% | 2671 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 51,866 psi | 85% | 2507 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,664 psi | 88% | 2657 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 54,375 psi | 89% | 2608 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,505 psi | 88% | 2566 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 54,636 psi | 90% | 2615 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,403 psi | 88% | 2598 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,882 psi | 88% | 2533 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,679 psi | 88% | 2766 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,331 psi | 89% | 2644 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,258 psi | 87% | 2546 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,287 psi | 87% | 2530 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 53,055 psi | 87% | 2549 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,257 psi | 86% | 2549 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 52,344 psi | 86% | 2651 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,088 psi | 64% | 2470 fps | 97.4% |
| Lovex S065 | <<locked>> | 84% | 53,853 psi | 88% | 2526 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 51,924 psi | 85% | 2526 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 52,359 psi | 86% | 2549 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,809 psi | 88% | 2598 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,001 psi | 64% | 2493 fps | 99.2% |
| Norma MRP | <<locked>> | 92% | 54,331 psi | 89% | 2687 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,563 psi | 90% | 2585 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 52,924 psi | 87% | 2671 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 53,388 psi | 88% | 2595 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,940 psi | 90% | 2664 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 63% | 1624 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,620 psi | 86% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,288 psi | 89% | 2654 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,244 psi | 89% | 2766 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,008 psi | 80% | 2667 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 90% | 54,650 psi | 90% | 2585 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 52,431 psi | 86% | 2595 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 51,866 psi | 85% | 2507 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,853 psi | 88% | 2526 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 51,924 psi | 85% | 2526 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,866 psi | 87% | 2484 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,011 psi | 85% | 2592 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 52,518 psi | 86% | 2533 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 54,998 psi | 90% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,939 psi | 87% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 53,751 psi | 88% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,011 psi | 87% | 2533 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,243 psi | 86% | 2549 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 52,156 psi | 86% | 2539 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,505 psi | 89% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,230 psi | 89% | 2687 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 98% | 53,795 psi | 88% | 2671 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,256 psi | 83% | 2667 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,214 psi | 86% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,375 psi | 89% | 2608 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,011 psi | 87% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,518 psi | 86% | 2566 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% | 34,316 psi | 56% | 2244 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 45,992 psi | 76% | 2457 fps | 100% |
| Accurate High Country | 59.7 gr | 80% | 37,086 psi | 61% | 2395 fps | 96.5% |
| Accurate MAGPRO | 62.4 gr | 82% | 37,550 psi | 62% | 2398 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 38,348 psi | 63% | 2356 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 36,593 psi | 60% | 2352 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 90% | 35,230 psi | 58% | 2320 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 27,847 psi | 46% | 2185 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,034 psi | 72% | 2464 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,763 psi | 83% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,377 psi | 63% | 2356 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,171 psi | 56% | 2306 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,011 psi | 54% | 2270 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,747 psi | 47% | 2198 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,897 psi | 59% | 2402 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 46,876 psi | 77% | 2487 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 31,923 psi | 52% | 2251 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 33,968 psi | 56% | 2336 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 34,171 psi | 56% | 2306 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 48,776 psi | 80% | 2461 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 33,634 psi | 55% | 2287 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 47,587 psi | 78% | 2507 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 50,053 psi | 82% | 2513 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 36,463 psi | 60% | 2300 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 38,348 psi | 63% | 2339 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,742 psi | 69% | 2359 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 29,965 psi | 49% | 2270 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 46,891 psi | 77% | 2533 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 46% | 1414 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,121 psi | 72% | 2405 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,937 psi | 82% | 2480 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 43,918 psi | 72% | 2415 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 38,319 psi | 63% | 2303 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 35,172 psi | 58% | 2329 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 34,389 psi | 56% | 2365 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 47,659 psi | 78% | 2434 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,948 psi | 75% | 2431 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 29,675 psi | 49% | 2139 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 44,092 psi | 72% | 2444 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 28,311 psi | 46% | 2231 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 35,679 psi | 59% | 2369 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 45,136 psi | 74% | 2448 fps | 100% |
| Ramshot Grand | 60.7 gr | 82% | 34,664 psi | 57% | 2336 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,918 psi | 72% | 2451 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 28,761 psi | 47% | 2175 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 47% | 1450 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,963 psi | 75% | 2484 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,106 psi | 72% | 2503 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 28,819 psi | 47% | 2244 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 36,666 psi | 60% | 2431 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 39,755 psi | 65% | 2336 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 37,768 psi | 62% | 2343 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 48,776 psi | 80% | 2461 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,659 psi | 78% | 2434 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,948 psi | 75% | 2431 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,470 psi | 76% | 2388 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,434 psi | 61% | 2336 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 40,408 psi | 66% | 2329 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 42,134 psi | 69% | 2408 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,218 psi | 63% | 2323 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,488 psi | 83% | 2428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,514 psi | 76% | 2438 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,141 psi | 54% | 2215 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 45,919 psi | 75% | 2448 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,043 psi | 61% | 2336 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 35,940 psi | 59% | 2359 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 36,013 psi | 59% | 2356 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 40,872 psi | 67% | 2500 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,498 psi | 75% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,790 psi | 78% | 2510 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,298 psi | 48% | 2303 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,853 psi | 57% | 2257 fps | 96.7% |
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 78 powders for .300 Blaser Mag. loaded with the .308 | 230gr | Berger Hybrid OTM Tactical. Hodgdon Retumbo delivers the highest muzzle velocity at 2,766 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,766 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 230.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, Accurate High Country, Ramshot Grand rank at the top here: for .300 Blaser Mag. with the .308 | 230gr | Berger Hybrid OTM Tactical they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.