Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 165gr | Sierra SBT GameKing bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Accurate High Country.
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% | 53,911 psi | 89% | 3054 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 51,837 psi | 85% | 3038 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 51,430 psi | 84% | 3140 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 94% | 52,431 psi | 86% | 3143 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 53,592 psi | 88% | 3005 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,721 psi | 87% | 3091 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 54,041 psi | 89% | 3150 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,089 psi | 66% | 2917 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,939 psi | 87% | 3087 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,897 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,576 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,737 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,286 psi | 86% | 3077 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,664 psi | 88% | 3143 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,578 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,531 psi | 83% | 3120 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,897 psi | 90% | 3215 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,663 psi | 86% | 3127 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,311 psi | 76% | 3038 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 53,664 psi | 88% | 3143 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,810 psi | 90% | 3041 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,617 psi | 81% | 3058 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 53,693 psi | 88% | 3094 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 53,142 psi | 87% | 3051 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 54,085 psi | 89% | 3084 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,040 psi | 87% | 3068 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,026 psi | 87% | 3022 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,443 psi | 81% | 3176 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 54,027 psi | 89% | 3130 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,825 psi | 60% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,808 psi | 87% | 3025 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,924 psi | 87% | 3012 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 52,344 psi | 86% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,083 psi | 86% | 3015 fps | 97% |
| IMR 7828 SSC | <<locked>> | 96% | 51,822 psi | 85% | 3120 fps | 97.5% |
| Lovex S065 | <<locked>> | 86% | 53,417 psi | 88% | 3012 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,955 psi | 90% | 3061 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,358 psi | 84% | 3012 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 53,447 psi | 88% | 3077 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 53,359 psi | 88% | 3169 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 54,056 psi | 89% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,199 psi | 86% | 3140 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 52,779 psi | 87% | 3077 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,172 psi | 89% | 3133 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,478 psi | 62% | 1985 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,055 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 51,808 psi | 85% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,737 psi | 88% | 3150 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,835 psi | 82% | 3169 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 52,388 psi | 86% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,201 psi | 89% | 3058 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 51,590 psi | 85% | 3061 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,810 psi | 90% | 3041 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,417 psi | 88% | 3012 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,955 psi | 90% | 3061 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,911 psi | 89% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,852 psi | 87% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,866 psi | 87% | 2959 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,708 psi | 90% | 3120 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 52,402 psi | 86% | 2992 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,257 psi | 86% | 2989 fps | 96.8% |
| Somchem S365 | <<locked>> | 90% | 53,998 psi | 89% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,330 psi | 86% | 3041 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 53,447 psi | 88% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,417 psi | 86% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 51,677 psi | 85% | 3012 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 55,042 psi | 90% | 3077 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,316 psi | 88% | 3097 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,403 psi | 88% | 3159 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,852 psi | 87% | 3130 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 51,880 psi | 85% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,896 psi | 88% | 3097 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 51,082 psi | 84% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,996 psi | 85% | 3028 fps | 98.5% |
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 3100 | <<locked>> | 80% | 31,256 psi | 51% | 2582 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 42,192 psi | 69% | 2861 fps | 99.6% |
| Accurate High Country | 76.4 gr | 86% | 41,684 psi | 68% | 2940 fps | 95% |
| Accurate MAGPRO | 83.2 gr | 92% | 48,660 psi | 80% | 3071 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,502 psi | 83% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,408 psi | 66% | 2841 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 44,048 psi | 72% | 2949 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 35,273 psi | 58% | 2785 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,712 psi | 67% | 2844 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,474 psi | 85% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,495 psi | 66% | 2867 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,499 psi | 76% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,306 psi | 66% | 2835 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,247 psi | 63% | 2828 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,023 psi | 49% | 2612 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,950 psi | 49% | 2625 fps | 95.1% |
| Alliant Reloder-26 | 73.2 gr | 80% | 32,474 psi | 53% | 2743 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 40,524 psi | 67% | 2881 fps | 95.8% |
| Bofors RP30 | <<locked>> | 96% | 40,422 psi | 66% | 2910 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 38,247 psi | 63% | 2828 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,397 psi | 75% | 2867 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 40,538 psi | 67% | 2861 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 43,976 psi | 72% | 2910 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,586 psi | 76% | 2927 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 47,137 psi | 77% | 2956 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,209 psi | 76% | 2940 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,203 psi | 63% | 2753 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,869 psi | 62% | 2897 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,134 psi | 71% | 2927 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 45% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,944 psi | 67% | 2792 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,818 psi | 77% | 2900 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 40,190 psi | 66% | 2805 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,905 psi | 75% | 2897 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 45,121 psi | 74% | 2986 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 44,367 psi | 73% | 2844 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,743 psi | 70% | 2831 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 30,618 psi | 50% | 2562 fps | 95% |
| Norma 204 | <<locked>> | 80% | 40,683 psi | 67% | 2825 fps | 95.6% |
| Norma MRP | <<locked>> | 82% | 34,838 psi | 57% | 2772 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,655 psi | 68% | 2854 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,032 psi | 69% | 2930 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,408 psi | 66% | 2838 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 37,362 psi | 61% | 2799 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 46% | 1778 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,371 psi | 81% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,945 psi | 69% | 2877 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,379 psi | 66% | 2890 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,795 psi | 57% | 2805 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 49,226 psi | 81% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,730 psi | 73% | 2881 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 39,595 psi | 65% | 2818 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,397 psi | 75% | 2867 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,367 psi | 73% | 2844 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 42,743 psi | 70% | 2831 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,386 psi | 83% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,690 psi | 82% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,395 psi | 71% | 2785 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,247 psi | 64% | 2815 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,110 psi | 81% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,774 psi | 75% | 2867 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,247 psi | 63% | 2805 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,114 psi | 58% | 2680 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 47,108 psi | 77% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,989 psi | 71% | 2848 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,086 psi | 61% | 2720 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 42,453 psi | 70% | 2848 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,620 psi | 55% | 2697 fps | 98.4% |
| Vihtavuori N560 | <<locked>> | 90% | 46,383 psi | 76% | 3025 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 43,062 psi | 71% | 2940 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,076 psi | 69% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,976 psi | 72% | 2910 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,614 psi | 44% | 2602 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,465 psi | 65% | 2782 fps | 95.4% |
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 74 powders for .300 Lapua Mag. loaded with the .308 | 165gr | Sierra SBT GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,215 fps. ADI AR 2225 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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. Accurate MAGPRO, Alliant Reloder-26, Accurate High Country rank at the top here: for .300 Lapua Mag. with the .308 | 165gr | Sierra SBT GameKing 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.