Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 123gr | Sako Gamehead bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-16.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2015 | <<locked>> | 82% | 52,895 psi | 87% | 3271 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 52,040 psi | 85% | 3291 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,388 psi | 88% | 3356 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,578 psi | 90% | 3327 fps | 96% |
| Accurate 4064 | <<locked>> | 88% | 52,069 psi | 85% | 3340 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 52,069 psi | 85% | 3412 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 84% | 52,344 psi | 86% | 3369 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 90% | 53,316 psi | 88% | 3366 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,621 psi | 90% | 3379 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 51,793 psi | 85% | 3301 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 51,837 psi | 85% | 3488 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,563 psi | 88% | 3396 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,085 psi | 89% | 3419 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,359 psi | 88% | 3484 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,636 psi | 90% | 3527 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,886 psi | 67% | 3222 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,253 psi | 76% | 3412 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 52,170 psi | 86% | 3376 fps | 98.9% |
| Bofors RP3 | <<locked>> | 90% | 54,128 psi | 89% | 3409 fps | 99.9% |
| Bofors RP7 | <<locked>> | 94% | 54,360 psi | 89% | 3369 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 52,866 psi | 87% | 3304 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,172 psi | 89% | 3402 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,071 psi | 90% | 3422 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 96% | 54,940 psi | 90% | 3471 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 52,852 psi | 87% | 3383 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,113 psi | 87% | 3399 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 52,330 psi | 86% | 3412 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 58% | 2165 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,911 psi | 89% | 3383 fps | 99.8% |
| IMR 3031 | <<locked>> | 84% | 52,649 psi | 86% | 3373 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 52,837 psi | 87% | 3350 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 52,634 psi | 86% | 3317 fps | 96.4% |
| IMR 4350 | <<locked>> | 98% | 54,723 psi | 90% | 3392 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 52,808 psi | 87% | 3343 fps | 96.4% |
| IMR 4831 | <<locked>> | 98% | 52,750 psi | 87% | 3406 fps | 99% |
| IMR 4895 | <<locked>> | 86% | 51,967 psi | 85% | 3392 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 84% | 54,621 psi | 90% | 3379 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 52,025 psi | 85% | 3343 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,013 psi | 90% | 3346 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 52,852 psi | 87% | 3350 fps | 99.9% |
| Lovex S065 | <<locked>> | 94% | 52,257 psi | 86% | 3337 fps | 97.7% |
| Lovex S070 | <<locked>> | 96% | 53,200 psi | 87% | 3373 fps | 96.8% |
| Norma 201 | <<locked>> | 86% | 54,462 psi | 89% | 3373 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,853 psi | 90% | 3373 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,316 psi | 88% | 3402 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 54,824 psi | 90% | 3465 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 88% | 53,824 psi | 88% | 3425 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 98% | 53,766 psi | 88% | 3451 fps | 97.7% |
| Ramshot TAC | <<locked>> | 84% | 54,969 psi | 90% | 3383 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,781 psi | 90% | 3412 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 59% | 2215 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 51,895 psi | 85% | 3330 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,389 psi | 89% | 3491 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,230 psi | 89% | 3530 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 51,953 psi | 85% | 3432 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 51,445 psi | 84% | 3455 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 82% | 51,982 psi | 85% | 3301 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,853 psi | 90% | 3366 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,230 psi | 89% | 3402 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 54,360 psi | 89% | 3369 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 52,257 psi | 86% | 3337 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 52,025 psi | 85% | 3343 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 52,852 psi | 87% | 3350 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 96% | 53,200 psi | 87% | 3373 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 52,330 psi | 86% | 3402 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,606 psi | 88% | 3363 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,215 psi | 89% | 3392 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,301 psi | 86% | 3251 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 52,910 psi | 87% | 3248 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 52,446 psi | 86% | 3278 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 51,895 psi | 85% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,156 psi | 87% | 3350 fps | 99.5% |
| Somchem S355 | <<locked>> | 92% | 54,447 psi | 89% | 3402 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,910 psi | 87% | 3468 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 52,620 psi | 86% | 3238 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,563 psi | 90% | 3330 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 52,112 psi | 86% | 3291 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 52,460 psi | 86% | 3317 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,577 psi | 88% | 3396 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,085 psi | 90% | 3376 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,969 psi | 89% | 3340 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 52,881 psi | 87% | 3402 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,107 psi | 74% | 3317 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,186 psi | 89% | 3373 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 51,488 psi | 85% | 3363 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 51,605 psi | 85% | 3406 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,724 psi | 60% | 3209 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,201 psi | 89% | 3402 fps | 99.9% |
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 2015 | <<locked>> | 80% | 49,748 psi | 82% | 3219 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,583 psi | 70% | 3120 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,806 psi | 82% | 3294 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,966 psi | 84% | 3258 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 40,219 psi | 66% | 3107 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 39,378 psi | 65% | 3143 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 45,992 psi | 76% | 3241 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 39,015 psi | 64% | 3058 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,037 psi | 79% | 3255 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 48,472 psi | 80% | 3248 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,959 psi | 69% | 3264 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,696 psi | 64% | 3081 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,640 psi | 68% | 3159 fps | 97.2% |
| Alliant Reloder-16 | 68.4 gr | 88% | 38,754 psi | 64% | 3150 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,620 psi | 55% | 3031 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,765 psi | 55% | 3022 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 40,016 psi | 66% | 3255 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,353 psi | 74% | 3238 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 38,609 psi | 63% | 3087 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 50,981 psi | 84% | 3304 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,632 psi | 81% | 3245 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,166 psi | 77% | 3274 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,421 psi | 65% | 3087 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 48,095 psi | 79% | 3333 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,412 psi | 76% | 3258 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 33,460 psi | 55% | 2959 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,525 psi | 70% | 3212 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 43% | 1942 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,527 psi | 73% | 3199 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 46,035 psi | 76% | 3255 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,959 psi | 67% | 3100 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 49,371 psi | 81% | 3251 fps | 95.6% |
| IMR 4350 | <<locked>> | 96% | 51,285 psi | 84% | 3327 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,588 psi | 81% | 3281 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 37,782 psi | 62% | 3081 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,685 psi | 70% | 3196 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 48,037 psi | 79% | 3255 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 45,324 psi | 74% | 3215 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 45,658 psi | 75% | 3166 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 40,886 psi | 67% | 3107 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 43,265 psi | 71% | 3150 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 46,992 psi | 77% | 3248 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 44,991 psi | 74% | 3189 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 45,281 psi | 74% | 3199 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,060 psi | 67% | 3146 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 39,262 psi | 64% | 3140 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 40,669 psi | 67% | 3153 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 44,019 psi | 72% | 3251 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 48,153 psi | 79% | 3251 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,630 psi | 78% | 3274 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 44% | 1985 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,469 psi | 75% | 3199 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,077 psi | 72% | 3281 fps | 97.7% |
| ReloadSwiss RS 60 | 67 gr | 80% | 35,766 psi | 59% | 3114 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 39,044 psi | 64% | 3153 fps | 95.4% |
| ReloadSwiss RS 70 | 76.5 gr | 90% | 41,727 psi | 69% | 3232 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 48,907 psi | 80% | 3245 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,815 psi | 70% | 3130 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 36,245 psi | 60% | 3018 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 50,981 psi | 84% | 3304 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,265 psi | 71% | 3150 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,324 psi | 74% | 3215 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,886 psi | 67% | 3107 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 46,992 psi | 77% | 3248 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,318 psi | 61% | 3074 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,441 psi | 76% | 3222 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,585 psi | 73% | 3202 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,151 psi | 76% | 3140 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,479 psi | 63% | 2972 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 49,081 psi | 81% | 3215 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 45,876 psi | 75% | 3136 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,137 psi | 76% | 3219 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 37,014 psi | 61% | 3028 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 30,763 psi | 51% | 2940 fps | 96% |
| Vihtavuori N133 | <<locked>> | 80% | 46,470 psi | 76% | 3133 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,279 psi | 69% | 3117 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,975 psi | 71% | 3120 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,244 psi | 58% | 2953 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 38,421 psi | 63% | 3077 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,240 psi | 79% | 3251 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 41,539 psi | 68% | 3104 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 40,524 psi | 67% | 3143 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 36,767 psi | 60% | 3117 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,591 psi | 55% | 2917 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 48,182 psi | 79% | 3301 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 48,283 psi | 79% | 3337 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 32,097 psi | 53% | 3045 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,034 psi | 72% | 3202 fps | 98.8% |
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 88 powders for .300 Blaser Mag. loaded with the .308 | 123gr | Sako Gamehead. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,530 fps; across all powders the maximum-charge window runs from 2,165 fps to 3,530 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .300 Blaser Mag. with the .308 | 123gr | Sako Gamehead 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.