Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 130gr | Barnes X BT bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-26.
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 2495 | <<locked>> | 82% | 55,738 psi | 87% | 3209 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,608 psi | 87% | 3232 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,795 psi | 84% | 3271 fps | 98.1% |
| Accurate 4064 | <<locked>> | 84% | 55,724 psi | 87% | 3258 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,680 psi | 87% | 3343 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 82% | 57,029 psi | 89% | 3323 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 54,491 psi | 85% | 3264 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 98% | 56,086 psi | 88% | 3363 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,087 psi | 89% | 3455 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,593 psi | 87% | 3301 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,811 psi | 87% | 3320 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,593 psi | 87% | 3396 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,000 psi | 89% | 3432 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,274 psi | 87% | 3346 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 3291 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,990 psi | 69% | 3179 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3504 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,927 psi | 89% | 3337 fps | 99.6% |
| Bofors RP3 | <<locked>> | 86% | 56,942 psi | 89% | 3323 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 55,840 psi | 88% | 3278 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 86% | 56,913 psi | 89% | 3327 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 57,392 psi | 90% | 3386 fps | 98% |
| Hodgdon H4350 | <<locked>> | 90% | 56,985 psi | 89% | 3340 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 57,667 psi | 90% | 3337 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,101 psi | 88% | 3317 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,682 psi | 90% | 3373 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,682 psi | 90% | 3419 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 57% | 2119 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,013 psi | 86% | 3278 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,363 psi | 90% | 3304 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,768 psi | 89% | 3278 fps | 97.8% |
| IMR 4350 | <<locked>> | 94% | 56,434 psi | 88% | 3307 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,087 psi | 89% | 3307 fps | 97.8% |
| IMR 4831 | <<locked>> | 94% | 55,811 psi | 87% | 3327 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 57,246 psi | 90% | 3353 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,622 psi | 87% | 3238 fps | 99.9% |
| Lovex S062 | <<locked>> | 84% | 54,650 psi | 86% | 3251 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,389 psi | 85% | 3255 fps | 98.5% |
| Lovex S070 | <<locked>> | 92% | 55,608 psi | 87% | 3294 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,034 psi | 71% | 3100 fps | 96.2% |
| Norma 201 | <<locked>> | 82% | 56,202 psi | 88% | 3271 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,608 psi | 89% | 3271 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,187 psi | 86% | 3307 fps | 99.9% |
| Norma 204 | <<locked>> | 94% | 57,305 psi | 90% | 3360 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3442 fps | 97.8% |
| Norma URP | <<locked>> | 94% | 57,537 psi | 90% | 3383 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 55,622 psi | 87% | 3323 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 56,130 psi | 88% | 3366 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 58% | 2172 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,753 psi | 89% | 3301 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,362 psi | 88% | 3389 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,434 psi | 88% | 3428 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,259 psi | 87% | 3356 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,188 psi | 90% | 3442 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 56,768 psi | 89% | 3268 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,739 psi | 89% | 3310 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 54,621 psi | 86% | 3333 fps | 96% |
| Rottweil R 907 | <<locked>> | 90% | 55,840 psi | 88% | 3278 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,389 psi | 85% | 3255 fps | 98.5% |
| Shooters World Precision | <<locked>> | 84% | 54,650 psi | 86% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,608 psi | 87% | 3294 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,244 psi | 85% | 3307 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,288 psi | 87% | 3284 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,492 psi | 89% | 3196 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,290 psi | 90% | 3192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,537 psi | 90% | 3255 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 56,492 psi | 89% | 3192 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,536 psi | 89% | 3307 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,623 psi | 89% | 3386 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,622 psi | 87% | 3314 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,811 psi | 89% | 3176 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,753 psi | 89% | 3232 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,956 psi | 89% | 3238 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,273 psi | 85% | 3222 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,898 psi | 88% | 3314 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 84% | 55,361 psi | 87% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,347 psi | 87% | 3317 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3386 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,753 psi | 87% | 3278 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,595 psi | 90% | 3392 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,600 psi | 71% | 3337 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,651 psi | 87% | 3297 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3294 fps | 95.9% |
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 2495 | <<locked>> | 80% | 52,330 psi | 82% | 3153 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,921 psi | 77% | 3107 fps | 95.3% |
| Accurate 3100 | <<locked>> | 92% | 41,437 psi | 65% | 3022 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 49,458 psi | 78% | 3153 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,652 psi | 59% | 2963 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 53,679 psi | 84% | 3268 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 45,600 psi | 71% | 3087 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 52,634 psi | 82% | 3297 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,821 psi | 78% | 3317 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,311 psi | 73% | 3127 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,356 psi | 77% | 3199 fps | 99.1% |
| Alliant Reloder-16 | 65.9 gr | 80% | 36,187 psi | 57% | 2956 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,799 psi | 64% | 3104 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,938 psi | 81% | 3284 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 32,648 psi | 51% | 2864 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 41,408 psi | 65% | 3114 fps | 95.7% |
| Alliant Reloder-26 | 80 gr | 88% | 37,782 psi | 59% | 3064 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,156 psi | 83% | 3268 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 46,934 psi | 74% | 3140 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 49,559 psi | 78% | 3156 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,224 psi | 74% | 3140 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 47,326 psi | 74% | 3192 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 50,386 psi | 79% | 3215 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 54,230 psi | 85% | 3278 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,939 psi | 53% | 2848 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,720 psi | 79% | 3248 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 46,833 psi | 73% | 3205 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 43% | 1903 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,692 psi | 81% | 3219 fps | 99.8% |
| IMR 4064 | <<locked>> | 80% | 47,950 psi | 75% | 3130 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,256 psi | 79% | 3156 fps | 96.5% |
| IMR 4350 | <<locked>> | 88% | 47,152 psi | 74% | 3127 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,747 psi | 75% | 3127 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 36,013 psi | 56% | 2904 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 50,560 psi | 79% | 3232 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 52,518 psi | 82% | 3182 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 48,675 psi | 76% | 3143 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 40,466 psi | 63% | 2959 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 46,499 psi | 73% | 3114 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 42,395 psi | 66% | 3045 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,866 psi | 83% | 3212 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,185 psi | 83% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,762 psi | 76% | 3186 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 53,708 psi | 84% | 3294 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 45,861 psi | 72% | 3235 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 37,115 psi | 58% | 2949 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,733 psi | 76% | 3199 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 43,424 psi | 68% | 3110 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 44% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,963 psi | 74% | 3114 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,837 psi | 83% | 3327 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,163 psi | 68% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,985 psi | 58% | 2966 fps | 95% |
| ReloadSwiss RS 70 | 75.7 gr | 84% | 41,017 psi | 64% | 3094 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,575 psi | 79% | 3163 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 44,469 psi | 70% | 3081 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 96% | 51,184 psi | 80% | 3268 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 49,559 psi | 78% | 3156 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,466 psi | 63% | 2959 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 48,675 psi | 76% | 3143 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 46,499 psi | 73% | 3114 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,817 psi | 70% | 3123 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,011 psi | 82% | 3225 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,229 psi | 83% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,136 psi | 71% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,918 psi | 70% | 3015 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 53,214 psi | 83% | 3143 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,498 psi | 70% | 3074 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 33,649 psi | 53% | 2900 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 49,139 psi | 77% | 3189 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 53,534 psi | 84% | 3127 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,343 psi | 79% | 3130 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,502 psi | 79% | 3133 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,540 psi | 67% | 3002 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 38,319 psi | 60% | 2949 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,008 psi | 77% | 3123 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,101 psi | 60% | 2949 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 36,027 psi | 56% | 2956 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,594 psi | 59% | 2910 fps | 98% |
| Winchester 760 | <<locked>> | 86% | 47,326 psi | 74% | 3192 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 31,212 psi | 49% | 2900 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,141 psi | 82% | 3235 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,938 psi | 81% | 3232 fps | 95% |
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 83 powders for .300 Weath. Mag. loaded with the .308 | 130gr | Barnes X BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,504 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,504 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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. Alliant Reloder-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 130gr | Barnes X BT 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.