Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 125gr | Sierra MatchKing bullet and 85 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-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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,882 psi | 90% | 3337 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,055 psi | 87% | 3323 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,125 psi | 82% | 3346 fps | 98% |
| Accurate 4064 | <<locked>> | 84% | 51,764 psi | 85% | 3337 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,301 psi | 86% | 3428 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,288 psi | 89% | 3422 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 52,228 psi | 86% | 3363 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 98% | 53,606 psi | 88% | 3458 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,824 psi | 90% | 3560 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 52,794 psi | 87% | 3392 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,069 psi | 87% | 3412 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,142 psi | 87% | 3497 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,462 psi | 89% | 3530 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,881 psi | 87% | 3442 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,007 psi | 77% | 3373 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,278 psi | 68% | 3255 fps | 96.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,331 psi | 89% | 3593 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,476 psi | 89% | 3432 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 53,461 psi | 88% | 3406 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 53,316 psi | 88% | 3373 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 86% | 54,201 psi | 89% | 3422 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 54,766 psi | 90% | 3484 fps | 98% |
| Hodgdon H4350 | <<locked>> | 90% | 54,650 psi | 90% | 3438 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 54,926 psi | 90% | 3432 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,258 psi | 87% | 3409 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,085 psi | 90% | 3468 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 51,314 psi | 84% | 3445 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 59% | 2205 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,620 psi | 86% | 3376 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,969 psi | 90% | 3406 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,462 psi | 89% | 3376 fps | 97.8% |
| IMR 4350 | <<locked>> | 94% | 54,172 psi | 89% | 3406 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,969 psi | 90% | 3412 fps | 97.9% |
| IMR 4831 | <<locked>> | 94% | 52,881 psi | 87% | 3419 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 54,447 psi | 89% | 3451 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,665 psi | 90% | 3392 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,417 psi | 88% | 3340 fps | 99.9% |
| Lovex S062 | <<locked>> | 84% | 51,822 psi | 85% | 3343 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,853 psi | 90% | 3406 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 52,721 psi | 87% | 3383 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 53,171 psi | 87% | 3363 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,809 psi | 88% | 3363 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,373 psi | 86% | 3399 fps | 99.9% |
| Norma 204 | <<locked>> | 94% | 54,926 psi | 90% | 3458 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 53,127 psi | 87% | 3530 fps | 97.8% |
| Norma URP | <<locked>> | 94% | 54,650 psi | 90% | 3474 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 53,113 psi | 87% | 3422 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 53,650 psi | 88% | 3465 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 60% | 2257 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,070 psi | 89% | 3392 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,708 psi | 88% | 3488 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,751 psi | 88% | 3524 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,112 psi | 86% | 3442 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,824 psi | 90% | 3543 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 53,708 psi | 88% | 3363 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,519 psi | 88% | 3399 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 51,793 psi | 85% | 3422 fps | 96% |
| Rottweil R 907 | <<locked>> | 90% | 53,316 psi | 88% | 3373 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,853 psi | 90% | 3406 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,665 psi | 90% | 3392 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 51,822 psi | 85% | 3343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,721 psi | 87% | 3383 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 51,721 psi | 85% | 3402 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 52,997 psi | 87% | 3383 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,954 psi | 89% | 3291 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,926 psi | 90% | 3287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,752 psi | 90% | 3346 fps | 97.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,100 psi | 90% | 3488 fps | 96.7% |
| Somchem S335 | <<locked>> | 82% | 53,824 psi | 88% | 3287 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,635 psi | 88% | 3399 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,635 psi | 88% | 3478 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,663 psi | 86% | 3399 fps | 97% |
| Vihtavuori N133 | <<locked>> | 82% | 54,360 psi | 89% | 3274 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,867 psi | 88% | 3323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,404 psi | 89% | 3337 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 51,503 psi | 85% | 3310 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,403 psi | 88% | 3409 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 84% | 52,794 psi | 87% | 3327 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,562 psi | 86% | 3409 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,591 psi | 86% | 3468 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,345 psi | 88% | 3369 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,766 psi | 90% | 3484 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,583 psi | 70% | 3412 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 52,939 psi | 87% | 3392 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,953 psi | 87% | 3386 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,138 psi | 79% | 3225 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,296 psi | 76% | 3189 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 40,654 psi | 67% | 3143 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 45,513 psi | 75% | 3222 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,156 psi | 56% | 3009 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 51,010 psi | 84% | 3360 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 43,192 psi | 71% | 3176 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 50,241 psi | 82% | 3389 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,282 psi | 78% | 3409 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,395 psi | 71% | 3205 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,586 psi | 76% | 3284 fps | 99% |
| Alliant Reloder-16 | 69.8 gr | 82% | 36,027 psi | 59% | 3094 fps | 96% |
| Alliant Reloder-17 | 73.3 gr | 80% | 38,101 psi | 63% | 3176 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,574 psi | 81% | 3379 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 31,807 psi | 52% | 2979 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,580 psi | 63% | 3179 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 37,362 psi | 61% | 3199 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,807 psi | 83% | 3363 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 43,584 psi | 72% | 3212 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 46,804 psi | 77% | 3241 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 44,208 psi | 73% | 3219 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 44,614 psi | 73% | 3274 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 47,819 psi | 79% | 3301 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 51,561 psi | 85% | 3373 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,140 psi | 51% | 2904 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,080 psi | 79% | 3340 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 44,208 psi | 73% | 3287 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 44% | 1978 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,356 psi | 81% | 3314 fps | 99.8% |
| IMR 4064 | <<locked>> | 80% | 45,397 psi | 75% | 3219 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,950 psi | 79% | 3248 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 47,630 psi | 78% | 3278 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,527 psi | 75% | 3215 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 35,360 psi | 58% | 3025 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 47,761 psi | 78% | 3320 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 51,053 psi | 84% | 3333 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,198 psi | 82% | 3281 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 45,629 psi | 75% | 3225 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 40,118 psi | 66% | 3091 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 43,497 psi | 71% | 3189 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,908 psi | 82% | 3301 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,314 psi | 83% | 3304 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,948 psi | 75% | 3271 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 51,213 psi | 84% | 3386 fps | 95.4% |
| Norma MRP | <<locked>> | 94% | 43,047 psi | 71% | 3310 fps | 95% |
| Norma URP | <<locked>> | 82% | 36,535 psi | 60% | 3074 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 46,035 psi | 76% | 3284 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 40,857 psi | 67% | 3192 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 45% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,382 psi | 73% | 3196 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,038 psi | 82% | 3419 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,495 psi | 66% | 3255 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,550 psi | 60% | 3094 fps | 95.6% |
| ReloadSwiss RS 70 | 78.2 gr | 84% | 38,537 psi | 63% | 3173 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 47,485 psi | 78% | 3245 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 40,959 psi | 67% | 3146 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 96% | 48,428 psi | 80% | 3353 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 46,804 psi | 77% | 3241 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,118 psi | 66% | 3091 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,053 psi | 84% | 3333 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,629 psi | 75% | 3225 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 43,497 psi | 71% | 3189 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,206 psi | 69% | 3205 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,603 psi | 81% | 3320 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,763 psi | 83% | 3238 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,685 psi | 70% | 3074 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,991 psi | 74% | 3153 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,314 psi | 84% | 3415 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,589 psi | 83% | 3232 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,553 psi | 68% | 3153 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 30,705 psi | 50% | 2949 fps | 97.2% |
| Somchem S385 | <<locked>> | 94% | 46,137 psi | 76% | 3268 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 51,213 psi | 84% | 3222 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,369 psi | 78% | 3215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,732 psi | 78% | 3222 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,581 psi | 65% | 3071 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 35,578 psi | 58% | 3015 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 46,267 psi | 76% | 3209 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,157 psi | 58% | 3012 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 32,634 psi | 54% | 3002 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,157 psi | 58% | 2979 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 44,773 psi | 74% | 3278 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,269 psi | 50% | 3012 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,501 psi | 81% | 3323 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,458 psi | 81% | 3320 fps | 95.1% |
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 102 powders for .300 Lapua Mag. loaded with the .308 | 125gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,593 fps; across all powders the maximum-charge window runs from 2,205 fps to 3,593 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-17 rank at the top here: for .300 Lapua Mag. with the .308 | 125gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.