Load Specifications
Load data in caliber .300 Blaser Mag. with .310 | 123gr | Hornady SST 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 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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 2015 | <<locked>> | 82% | 52,808 psi | 87% | 3268 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 51,953 psi | 85% | 3287 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,345 psi | 88% | 3356 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,491 psi | 89% | 3323 fps | 95.9% |
| Accurate 4064 | <<locked>> | 88% | 52,025 psi | 85% | 3337 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 51,967 psi | 85% | 3412 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 84% | 52,243 psi | 86% | 3369 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 90% | 53,447 psi | 88% | 3369 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,549 psi | 90% | 3376 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 51,895 psi | 85% | 3301 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 51,735 psi | 85% | 3484 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,461 psi | 88% | 3392 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,983 psi | 89% | 3415 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,272 psi | 87% | 3481 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,549 psi | 90% | 3524 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,828 psi | 67% | 3222 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,209 psi | 76% | 3409 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 52,083 psi | 86% | 3373 fps | 98.9% |
| Bofors RP3 | <<locked>> | 90% | 54,027 psi | 89% | 3406 fps | 99.9% |
| Bofors RP7 | <<locked>> | 94% | 54,288 psi | 89% | 3366 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 52,765 psi | 87% | 3304 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,070 psi | 89% | 3402 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,969 psi | 90% | 3419 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 96% | 54,853 psi | 90% | 3468 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 52,765 psi | 87% | 3383 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,040 psi | 87% | 3396 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 52,228 psi | 86% | 3409 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 58% | 2169 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,027 psi | 89% | 3386 fps | 99.8% |
| IMR 3031 | <<locked>> | 84% | 52,518 psi | 86% | 3373 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 52,736 psi | 87% | 3346 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 52,547 psi | 86% | 3314 fps | 96.4% |
| IMR 4350 | <<locked>> | 98% | 54,650 psi | 90% | 3389 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 52,736 psi | 87% | 3343 fps | 96.3% |
| IMR 4831 | <<locked>> | 98% | 52,663 psi | 86% | 3402 fps | 98.9% |
| IMR 4895 | <<locked>> | 86% | 51,866 psi | 85% | 3389 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 84% | 54,549 psi | 90% | 3376 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 51,909 psi | 85% | 3340 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,984 psi | 90% | 3350 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 52,779 psi | 87% | 3350 fps | 99.9% |
| Lovex S065 | <<locked>> | 94% | 52,170 psi | 86% | 3333 fps | 97.7% |
| Lovex S070 | <<locked>> | 96% | 53,127 psi | 87% | 3369 fps | 96.8% |
| Norma 201 | <<locked>> | 86% | 54,346 psi | 89% | 3369 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,969 psi | 90% | 3376 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,214 psi | 87% | 3402 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 54,737 psi | 90% | 3465 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 88% | 53,722 psi | 88% | 3422 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 98% | 53,693 psi | 88% | 3448 fps | 97.7% |
| Ramshot TAC | <<locked>> | 84% | 54,882 psi | 90% | 3383 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,694 psi | 90% | 3409 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,911 psi | 59% | 2218 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 51,808 psi | 85% | 3330 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,288 psi | 89% | 3491 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,143 psi | 89% | 3527 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 51,880 psi | 85% | 3428 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 51,387 psi | 84% | 3455 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 84% | 55,085 psi | 90% | 3356 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,984 psi | 90% | 3369 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,128 psi | 89% | 3399 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 54,288 psi | 89% | 3366 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 52,170 psi | 86% | 3333 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 51,909 psi | 85% | 3340 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 52,779 psi | 87% | 3350 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 96% | 53,127 psi | 87% | 3369 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 52,243 psi | 86% | 3402 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,519 psi | 88% | 3360 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,114 psi | 89% | 3392 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,199 psi | 86% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 52,866 psi | 87% | 3248 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 52,359 psi | 86% | 3274 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 51,851 psi | 85% | 3245 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,069 psi | 87% | 3350 fps | 99.5% |
| Somchem S355 | <<locked>> | 92% | 54,360 psi | 89% | 3399 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,837 psi | 87% | 3465 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 52,504 psi | 86% | 3235 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,679 psi | 90% | 3333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 52,011 psi | 85% | 3291 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 52,373 psi | 86% | 3317 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,490 psi | 88% | 3396 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,013 psi | 90% | 3376 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,882 psi | 88% | 3340 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 52,808 psi | 87% | 3399 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,034 psi | 74% | 3314 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,128 psi | 89% | 3373 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,114 psi | 90% | 3428 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,071 psi | 90% | 3471 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,680 psi | 60% | 3205 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,143 psi | 89% | 3399 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% | 49,617 psi | 81% | 3215 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,482 psi | 70% | 3117 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,908 psi | 82% | 3294 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 51,082 psi | 84% | 3261 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 40,161 psi | 66% | 3104 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 39,276 psi | 64% | 3136 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 45,890 psi | 75% | 3241 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,928 psi | 64% | 3054 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,979 psi | 79% | 3255 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 48,414 psi | 79% | 3245 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,047 psi | 69% | 3264 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,638 psi | 63% | 3081 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,597 psi | 68% | 3156 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 38,667 psi | 63% | 3146 fps | 95.7% |
| Alliant Reloder-17 | 66.9 gr | 80% | 33,547 psi | 55% | 3025 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,707 psi | 55% | 3018 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,972 psi | 66% | 3251 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,266 psi | 74% | 3235 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 38,537 psi | 63% | 3084 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 50,894 psi | 84% | 3301 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,530 psi | 81% | 3241 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,268 psi | 78% | 3274 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,334 psi | 65% | 3087 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 48,008 psi | 79% | 3333 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,340 psi | 76% | 3251 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 33,373 psi | 55% | 2956 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,424 psi | 70% | 3212 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 43% | 1942 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,425 psi | 73% | 3196 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 45,963 psi | 75% | 3255 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,857 psi | 67% | 3097 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 49,342 psi | 81% | 3248 fps | 95.6% |
| IMR 4350 | <<locked>> | 96% | 51,213 psi | 84% | 3327 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,501 psi | 81% | 3278 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 37,724 psi | 62% | 3081 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,612 psi | 70% | 3196 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 47,979 psi | 79% | 3255 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 45,208 psi | 74% | 3215 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 45,788 psi | 75% | 3169 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 40,959 psi | 67% | 3107 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 43,236 psi | 71% | 3150 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 46,920 psi | 77% | 3245 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 44,889 psi | 74% | 3186 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 45,165 psi | 74% | 3196 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,959 psi | 67% | 3143 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 39,175 psi | 64% | 3133 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,756 psi | 67% | 3156 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 43,947 psi | 72% | 3251 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 48,124 psi | 79% | 3251 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,732 psi | 78% | 3278 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 44% | 1988 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,382 psi | 75% | 3199 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,034 psi | 72% | 3281 fps | 97.7% |
| ReloadSwiss RS 60 | 66.9 gr | 80% | 35,679 psi | 59% | 3110 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,957 psi | 64% | 3150 fps | 95.3% |
| ReloadSwiss RS 70 | 76.4 gr | 90% | 41,669 psi | 68% | 3232 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 48,849 psi | 80% | 3245 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,714 psi | 70% | 3127 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 36,172 psi | 59% | 3018 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 50,894 psi | 84% | 3301 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,236 psi | 71% | 3150 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,208 psi | 74% | 3215 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,959 psi | 67% | 3107 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 46,920 psi | 77% | 3245 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,231 psi | 61% | 3071 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,412 psi | 76% | 3219 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,483 psi | 73% | 3199 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,064 psi | 76% | 3136 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,421 psi | 63% | 2972 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 49,008 psi | 80% | 3212 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 45,832 psi | 75% | 3136 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,050 psi | 76% | 3215 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 36,927 psi | 61% | 3025 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 30,690 psi | 50% | 2940 fps | 96% |
| Vihtavuori N133 | <<locked>> | 80% | 46,412 psi | 76% | 3130 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,163 psi | 69% | 3114 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,873 psi | 70% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,157 psi | 58% | 2949 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 38,334 psi | 63% | 3074 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,196 psi | 79% | 3251 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 41,452 psi | 68% | 3100 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 40,451 psi | 66% | 3140 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 36,680 psi | 60% | 3117 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,533 psi | 55% | 2913 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 48,109 psi | 79% | 3301 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 48,211 psi | 79% | 3337 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 32,053 psi | 53% | 3045 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,135 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 .310 | 123gr | Hornady SST. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,527 fps; across all powders the maximum-charge window runs from 2,169 fps to 3,527 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. The 123.0 gr projectile in 0.31" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. 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 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 Blaser Mag. with the .310 | 123gr | Hornady SST 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.