Load Specifications
Load data in caliber .300 Weath. Mag. with .310 | 123gr | Hornady SST bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and ReloadSwiss RS 70.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 56,492 psi | 89% | 3291 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,347 psi | 88% | 3317 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,725 psi | 90% | 3389 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,752 psi | 86% | 3301 fps | 96.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,790 psi | 75% | 3241 fps | 96.4% |
| Accurate 4064 | <<locked>> | 88% | 56,565 psi | 89% | 3369 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,493 psi | 90% | 3461 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 84% | 56,014 psi | 88% | 3399 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 57,261 psi | 90% | 3399 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,766 psi | 86% | 3343 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,072 psi | 88% | 3327 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,362 psi | 88% | 3530 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,215 psi | 85% | 3366 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,505 psi | 85% | 3389 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,476 psi | 85% | 3465 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,753 psi | 87% | 3497 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,005 psi | 71% | 3271 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 3478 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,217 psi | 88% | 3409 fps | 99.4% |
| Bofors RP3 | <<locked>> | 88% | 55,129 psi | 86% | 3383 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,781 psi | 86% | 3343 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,086 psi | 88% | 3327 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,723 psi | 86% | 3373 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,796 psi | 87% | 3396 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 94% | 56,173 psi | 88% | 3451 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 92% | 56,072 psi | 88% | 3406 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 84% | 56,608 psi | 89% | 3412 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,636 psi | 86% | 3383 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,797 psi | 89% | 3448 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,869 psi | 89% | 3484 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 56% | 2175 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,331 psi | 85% | 3356 fps | 99.8% |
| IMR 3031 | <<locked>> | 84% | 56,971 psi | 89% | 3402 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,579 psi | 89% | 3383 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,144 psi | 88% | 3353 fps | 97.2% |
| IMR 4350 | <<locked>> | 96% | 55,666 psi | 87% | 3373 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,507 psi | 89% | 3379 fps | 97.2% |
| IMR 4831 | <<locked>> | 96% | 54,157 psi | 85% | 3389 fps | 99.1% |
| IMR 4895 | <<locked>> | 86% | 55,912 psi | 88% | 3425 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 54,766 psi | 86% | 3343 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,347 psi | 88% | 3373 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,158 psi | 86% | 3320 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 56,724 psi | 89% | 3379 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,289 psi | 88% | 3373 fps | 98.4% |
| Lovex S070 | <<locked>> | 96% | 57,624 psi | 90% | 3415 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 54,636 psi | 86% | 3337 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,303 psi | 87% | 3343 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,319 psi | 90% | 3435 fps | 99.9% |
| Norma URP | <<locked>> | 96% | 56,028 psi | 88% | 3442 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 86% | 54,563 psi | 86% | 3392 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 96% | 55,027 psi | 86% | 3432 fps | 97.9% |
| Ramshot TAC | <<locked>> | 82% | 55,143 psi | 86% | 3353 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,984 psi | 86% | 3379 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 57% | 2224 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,927 psi | 88% | 3373 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,347 psi | 87% | 3465 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,303 psi | 87% | 3501 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,348 psi | 90% | 3481 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,463 psi | 88% | 3514 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 82% | 55,521 psi | 87% | 3327 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,390 psi | 87% | 3340 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,969 psi | 86% | 3373 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,781 psi | 86% | 3343 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,289 psi | 88% | 3373 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,347 psi | 88% | 3373 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,724 psi | 89% | 3379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,624 psi | 90% | 3415 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,913 psi | 89% | 3442 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,766 psi | 84% | 3330 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,650 psi | 86% | 3363 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,738 psi | 87% | 3278 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,681 psi | 89% | 3274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,681 psi | 89% | 3323 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 55,332 psi | 87% | 3271 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,276 psi | 90% | 3386 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 55,143 psi | 86% | 3373 fps | 99.9% |
| Somchem S365 | <<locked>> | 98% | 54,868 psi | 86% | 3451 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 3366 fps | 96.2% |
| Vihtavuori N133 | <<locked>> | 84% | 56,115 psi | 88% | 3261 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,274 psi | 87% | 3304 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,970 psi | 88% | 3317 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,623 psi | 89% | 3350 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,781 psi | 86% | 3379 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 55,317 psi | 87% | 3346 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,302 psi | 85% | 3307 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,725 psi | 90% | 3445 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 3366 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,882 psi | 86% | 3346 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,724 psi | 87% | 3396 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,376 psi | 88% | 3451 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,567 psi | 64% | 3281 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,636 psi | 86% | 3369 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 53,171 psi | 83% | 3241 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,224 psi | 72% | 3150 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,882 psi | 84% | 3323 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,169 psi | 80% | 3235 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 44,541 psi | 70% | 3173 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,714 psi | 69% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 37,565 psi | 59% | 3045 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 49,313 psi | 77% | 3271 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 41,843 psi | 66% | 3091 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,358 psi | 80% | 3284 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 52,330 psi | 82% | 3268 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,614 psi | 71% | 3310 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,945 psi | 66% | 3117 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,918 psi | 70% | 3192 fps | 98% |
| Alliant Reloder-16 | 71.8 gr | 86% | 39,392 psi | 62% | 3127 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,492 psi | 57% | 3068 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 92% | 34,708 psi | 54% | 3005 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 41,147 psi | 64% | 3235 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,965 psi | 77% | 3274 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 41,887 psi | 66% | 3120 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 51,358 psi | 80% | 3278 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,663 psi | 83% | 3268 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,126 psi | 80% | 3307 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,583 psi | 67% | 3127 fps | 96.2% |
| Hodgdon H414 | <<locked>> | 90% | 49,052 psi | 77% | 3310 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 90% | 52,591 psi | 82% | 3340 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,821 psi | 78% | 3287 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 34,185 psi | 54% | 2936 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,151 psi | 72% | 3245 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 90% | 49,037 psi | 77% | 3330 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 42% | 1952 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,747 psi | 75% | 3228 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 49,922 psi | 78% | 3284 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,961 psi | 69% | 3133 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,530 psi | 78% | 3225 fps | 95.7% |
| IMR 4350 | <<locked>> | 94% | 52,054 psi | 82% | 3307 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,835 psi | 78% | 3251 fps | 95.7% |
| IMR 4831 | <<locked>> | 86% | 38,624 psi | 61% | 3054 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 46,050 psi | 72% | 3232 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,358 psi | 80% | 3284 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 49,182 psi | 77% | 3248 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,631 psi | 76% | 3199 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 44,005 psi | 69% | 3136 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 43,859 psi | 69% | 3123 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 47,601 psi | 75% | 3222 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 48,196 psi | 76% | 3219 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 48,733 psi | 76% | 3228 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,280 psi | 69% | 3179 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 40,103 psi | 63% | 3110 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,411 psi | 70% | 3196 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 44,889 psi | 70% | 3225 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,634 psi | 81% | 3287 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,416 psi | 81% | 3310 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 42% | 1998 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,745 psi | 72% | 3169 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,935 psi | 75% | 3320 fps | 98.5% |
| ReloadSwiss RS 60 | 71.9 gr | 80% | 38,812 psi | 61% | 3150 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 40,263 psi | 63% | 3130 fps | 95.6% |
| ReloadSwiss RS 70 | 80.4 gr | 88% | 42,540 psi | 67% | 3212 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 52,272 psi | 82% | 3271 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,818 psi | 72% | 3159 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 39,349 psi | 62% | 3051 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 51,358 psi | 80% | 3278 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,859 psi | 69% | 3123 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,182 psi | 77% | 3248 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,005 psi | 69% | 3136 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 47,601 psi | 75% | 3222 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,437 psi | 63% | 3107 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,183 psi | 79% | 3261 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,805 psi | 75% | 3232 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,240 psi | 77% | 3166 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,321 psi | 65% | 3002 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,472 psi | 78% | 3189 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 48,994 psi | 77% | 3159 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,864 psi | 78% | 3255 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 39,987 psi | 63% | 3058 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 29,370 psi | 46% | 2844 fps | 95% |
| Somchem S385 | <<locked>> | 98% | 50,430 psi | 79% | 3297 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 49,676 psi | 78% | 3156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,745 psi | 72% | 3143 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,108 psi | 72% | 3146 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,058 psi | 60% | 2982 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 39,059 psi | 61% | 3051 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 51,605 psi | 81% | 3281 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 44,686 psi | 70% | 3130 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 38,653 psi | 61% | 3048 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 38,159 psi | 60% | 3097 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,837 psi | 53% | 2884 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 52,025 psi | 82% | 3333 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 49,240 psi | 77% | 3314 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 94% | 33,040 psi | 52% | 3035 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,630 psi | 75% | 3235 fps | 99.3% |
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 92 powders for .300 Weath. Mag. loaded with the .310 | 123gr | Hornady SST. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,530 fps; across all powders the maximum-charge window runs from 2,175 fps to 3,530 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, 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. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 Weath. 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.