Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 155gr | Sierra MatchKing bullet and 75 powders. The key underlying parameters are shown in the table above.
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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 53,040 psi | 87% | 3123 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 54,607 psi | 90% | 3176 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,186 psi | 89% | 3278 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 52,968 psi | 87% | 3087 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 51,967 psi | 85% | 3163 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 96% | 53,156 psi | 87% | 3215 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,421 psi | 65% | 2972 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,099 psi | 89% | 3117 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,851 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,837 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,056 psi | 90% | 3212 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,779 psi | 87% | 3215 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,664 psi | 88% | 3199 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,487 psi | 81% | 3189 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,766 psi | 88% | 3287 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 51,735 psi | 85% | 3196 fps | 98.1% |
| Bofors RP3 | <<locked>> | 82% | 54,955 psi | 90% | 3133 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,469 psi | 75% | 3104 fps | 96.2% |
| Bofors RP5 | <<locked>> | 96% | 52,779 psi | 87% | 3215 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 54,099 psi | 89% | 3120 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,052 psi | 81% | 3127 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 55,100 psi | 90% | 3150 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,881 psi | 87% | 3169 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 52,344 psi | 86% | 3123 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 94% | 53,301 psi | 88% | 3156 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,083 psi | 86% | 3136 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,272 psi | 86% | 3100 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,573 psi | 80% | 3241 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 52,939 psi | 87% | 3202 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 60% | 2011 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,141 psi | 86% | 3100 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,330 psi | 86% | 3091 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 54,926 psi | 90% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,665 psi | 90% | 3146 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 54,418 psi | 89% | 3255 fps | 97.6% |
| Lovex S065 | <<locked>> | 86% | 52,721 psi | 87% | 3087 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 54,230 psi | 89% | 3136 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,401 psi | 83% | 3081 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 52,692 psi | 87% | 3150 fps | 98.1% |
| Norma MRP | <<locked>> | 94% | 52,344 psi | 86% | 3238 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 53,301 psi | 88% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,155 psi | 84% | 3202 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 88% | 52,083 psi | 86% | 3156 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,359 psi | 88% | 3205 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 61% | 2057 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,868 psi | 90% | 3130 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,083 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,578 psi | 90% | 3199 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,779 psi | 87% | 3225 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,037 psi | 81% | 3235 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 82% | 51,561 psi | 85% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,490 psi | 88% | 3133 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 94% | 54,273 psi | 89% | 3199 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,099 psi | 89% | 3120 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,721 psi | 87% | 3087 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 54,230 psi | 89% | 3136 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,113 psi | 87% | 3133 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,141 psi | 86% | 2949 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,083 psi | 86% | 3035 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,809 psi | 88% | 3192 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 54,969 psi | 90% | 3127 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,561 psi | 85% | 3061 fps | 96.2% |
| Somchem S365 | <<locked>> | 90% | 53,011 psi | 87% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,868 psi | 90% | 3169 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 52,794 psi | 87% | 3041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 51,517 psi | 85% | 3094 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,462 psi | 89% | 3146 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 54,389 psi | 89% | 3156 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,417 psi | 86% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,431 psi | 86% | 3225 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,025 psi | 85% | 3199 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,795 psi | 90% | 3110 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,069 psi | 87% | 3173 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,114 psi | 89% | 3337 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,955 psi | 90% | 3163 fps | 98.5% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 32,793 psi | 54% | 2697 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 41,452 psi | 68% | 2930 fps | 99.2% |
| Accurate High Country | <<locked>> | 88% | 43,816 psi | 72% | 3068 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,763 psi | 82% | 3031 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,453 psi | 70% | 2966 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 46,470 psi | 76% | 3084 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 98% | 36,883 psi | 61% | 2904 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,647 psi | 83% | 3058 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,740 psi | 65% | 2933 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,716 psi | 75% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,293 psi | 69% | 2963 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,176 psi | 66% | 2956 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,443 psi | 48% | 2667 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,386 psi | 52% | 2740 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,778 psi | 52% | 2795 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 42,453 psi | 70% | 3005 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,343 psi | 84% | 3074 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,569 psi | 70% | 3038 fps | 95.2% |
| Bofors RP5 | <<locked>> | 88% | 40,176 psi | 66% | 2956 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,831 psi | 74% | 2940 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 42,656 psi | 70% | 2986 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 51,605 psi | 85% | 3091 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,192 psi | 71% | 2979 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,876 psi | 75% | 2999 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,734 psi | 82% | 3091 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,791 psi | 80% | 3074 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,478 psi | 62% | 2818 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,798 psi | 65% | 3025 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,351 psi | 70% | 2992 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 45% | 1798 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,364 psi | 66% | 2861 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,122 psi | 76% | 2969 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,581 psi | 65% | 2871 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,182 psi | 79% | 3025 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 44,556 psi | 73% | 3054 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 43,656 psi | 72% | 2917 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,989 psi | 69% | 2897 fps | 97.5% |
| Lovex S071 | <<locked>> | 86% | 32,024 psi | 53% | 2677 fps | 95% |
| Norma 204 | <<locked>> | 82% | 42,960 psi | 71% | 2956 fps | 95.7% |
| Norma MRP | <<locked>> | 84% | 36,782 psi | 60% | 2900 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 40,843 psi | 67% | 2920 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 44,324 psi | 73% | 3061 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,813 psi | 65% | 2907 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 39,581 psi | 65% | 2923 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,416 psi | 84% | 3071 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,501 psi | 80% | 3127 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,234 psi | 68% | 2946 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,668 psi | 65% | 2956 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,695 psi | 60% | 2930 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 48,356 psi | 79% | 3018 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,978 psi | 77% | 3009 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 41,582 psi | 68% | 2946 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,831 psi | 74% | 2940 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,656 psi | 72% | 2917 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 80% | 41,989 psi | 69% | 2897 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,734 psi | 82% | 3074 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,081 psi | 81% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,786 psi | 70% | 2854 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,249 psi | 68% | 2940 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,341 psi | 79% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,138 psi | 79% | 2995 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,536 psi | 62% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,941 psi | 61% | 2802 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,325 psi | 76% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,322 psi | 69% | 2917 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,972 psi | 64% | 2841 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 41,756 psi | 69% | 2917 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,895 psi | 54% | 2756 fps | 97.7% |
| Vihtavuori N560 | <<locked>> | 92% | 48,965 psi | 80% | 3159 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 45,310 psi | 74% | 3068 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,350 psi | 68% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,366 psi | 71% | 2979 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,165 psi | 43% | 2648 fps | 96.9% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,626 psi | 68% | 2910 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 81 powders for .300 Lapua Mag. loaded with the .308 | 155gr | Sierra MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,337 fps; across all powders the maximum-charge window runs from 2,011 fps to 3,337 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 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.