Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 170gr | Prvi Partizan FSP bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Hodgdon Retumbo.
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>> | 94% | 54,868 psi | 90% | 3038 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,330 psi | 86% | 3015 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 53,417 psi | 88% | 3130 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 90% | 53,301 psi | 88% | 3074 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 94% | 54,694 psi | 90% | 3133 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,081 psi | 81% | 3022 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,685 psi | 72% | 2979 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,287 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,215 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,866 psi | 87% | 3058 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,679 psi | 90% | 3130 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,185 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,027 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,214 psi | 86% | 3130 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 53,679 psi | 88% | 3110 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,111 psi | 84% | 3097 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 54,679 psi | 90% | 3130 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 54,781 psi | 90% | 3015 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,070 psi | 89% | 3117 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 84% | 54,099 psi | 89% | 3071 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 53,098 psi | 87% | 3022 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 54,549 psi | 90% | 3068 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,548 psi | 88% | 3051 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,534 psi | 88% | 2992 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,012 psi | 89% | 3235 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 54,418 psi | 89% | 3104 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,997 psi | 87% | 3002 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,968 psi | 87% | 2986 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 52,852 psi | 87% | 3009 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,373 psi | 86% | 2995 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 94% | 52,431 psi | 86% | 3107 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 53,519 psi | 88% | 2986 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 51,750 psi | 85% | 2976 fps | 99.7% |
| Lovex S071 | <<locked>> | 98% | 52,446 psi | 86% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,737 psi | 88% | 3054 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 39,334 psi | 65% | 2900 fps | 97.6% |
| Norma MRP | <<locked>> | 92% | 54,549 psi | 90% | 3153 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 54,534 psi | 90% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,084 psi | 87% | 3127 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 86% | 53,301 psi | 88% | 3058 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 51,314 psi | 84% | 3058 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 62% | 1982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,373 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,302 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3232 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,734 psi | 82% | 3104 fps | 96.9% |
| Rottweil R 904 | <<locked>> | 90% | 54,563 psi | 90% | 3041 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 90% | 52,344 psi | 86% | 3045 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 84% | 54,781 psi | 90% | 3015 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,519 psi | 88% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 51,750 psi | 85% | 2976 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,721 psi | 87% | 2933 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 51,924 psi | 85% | 3041 fps | 99% |
| Somchem S361 | <<locked>> | 88% | 52,417 psi | 86% | 2969 fps | 97.5% |
| Somchem S365 | <<locked>> | 88% | 54,926 psi | 90% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,924 psi | 87% | 3022 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 53,447 psi | 88% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 52,678 psi | 86% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,460 psi | 86% | 2999 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 84% | 52,069 psi | 85% | 2995 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,520 psi | 90% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,404 psi | 89% | 3146 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 54,128 psi | 89% | 3120 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,850 psi | 83% | 3114 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,011 psi | 85% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,273 psi | 89% | 3071 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,272 psi | 87% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,707 psi | 87% | 3012 fps | 99% |
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% | 34,142 psi | 56% | 2628 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 45,774 psi | 75% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 46,354 psi | 76% | 2995 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 38,116 psi | 63% | 2759 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 41,698 psi | 68% | 2874 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 40,147 psi | 66% | 2828 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 33,649 psi | 55% | 2720 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,700 psi | 72% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,633 psi | 83% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,174 psi | 63% | 2756 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,289 psi | 60% | 2749 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,663 psi | 54% | 2654 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,529 psi | 47% | 2552 fps | 95.1% |
| Alliant Reloder-26 | 76.8 gr | 80% | 35,694 psi | 59% | 2795 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 38,653 psi | 63% | 2805 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 38,899 psi | 64% | 2844 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 36,289 psi | 60% | 2749 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,312 psi | 79% | 2900 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 38,392 psi | 63% | 2789 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 47,297 psi | 78% | 2946 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 49,777 psi | 82% | 2963 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 44,585 psi | 73% | 2881 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,743 psi | 72% | 2864 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,205 psi | 68% | 2779 fps | 100% |
| Hodgdon Retumbo | 79 gr | 88% | 36,129 psi | 59% | 2825 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 46,862 psi | 77% | 2972 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 46% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,888 psi | 72% | 2828 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,705 psi | 82% | 2930 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 43,468 psi | 71% | 2841 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,207 psi | 71% | 2815 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 88% | 42,728 psi | 70% | 2910 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 47,297 psi | 78% | 2874 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 45,672 psi | 75% | 2864 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 29,356 psi | 48% | 2497 fps | 95% |
| Norma 204 | <<locked>> | 80% | 43,830 psi | 72% | 2864 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 34,287 psi | 56% | 2766 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 35,549 psi | 58% | 2759 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 44,846 psi | 74% | 2884 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 39,740 psi | 65% | 2854 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 43,671 psi | 72% | 2877 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 35,462 psi | 58% | 2723 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 46% | 1772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,643 psi | 75% | 2917 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,772 psi | 72% | 2933 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,098 psi | 54% | 2733 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,122 psi | 76% | 3035 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 82% | 42,090 psi | 69% | 2799 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 37,391 psi | 61% | 2736 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 48,312 psi | 79% | 2900 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,297 psi | 78% | 2874 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 45,672 psi | 75% | 2864 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,267 psi | 76% | 2818 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,086 psi | 61% | 2733 fps | 95.4% |
| Somchem S361 | <<locked>> | 82% | 42,902 psi | 70% | 2785 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 41,843 psi | 69% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,971 psi | 62% | 2723 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,227 psi | 82% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,282 psi | 76% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,128 psi | 58% | 2644 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,585 psi | 75% | 2881 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,709 psi | 60% | 2740 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 44,121 psi | 72% | 2946 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 41,234 psi | 68% | 2867 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 98% | 47,297 psi | 78% | 3045 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,339 psi | 74% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,427 psi | 78% | 2949 fps | 99.2% |
| Winchester StaBALL HD | 73.8 gr | 80% | 29,066 psi | 48% | 2667 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,173 psi | 61% | 2703 fps | 95.3% |
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 75 powders for .300 Lapua Mag. loaded with the .308 | 170gr | Prvi Partizan FSP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,235 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:16.0 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. Alliant Reloder-26, Winchester StaBALL HD, Hodgdon Retumbo rank at the top here: for .300 Lapua Mag. with the .308 | 170gr | Prvi Partizan FSP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.