Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 165gr | Swift Scirocco bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 53,534 psi | 88% | 3045 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,100 psi | 90% | 3091 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 51,924 psi | 85% | 3130 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 53,447 psi | 88% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,388 psi | 86% | 3084 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 53,708 psi | 88% | 3140 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,711 psi | 65% | 2904 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,520 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,417 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,330 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 51,982 psi | 85% | 3071 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,374 psi | 88% | 3140 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,244 psi | 89% | 3117 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,009 psi | 82% | 3110 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,520 psi | 90% | 3209 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,373 psi | 86% | 3117 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,035 psi | 76% | 3031 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 53,374 psi | 88% | 3140 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 54,665 psi | 90% | 3038 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,414 psi | 81% | 3051 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 53,330 psi | 88% | 3087 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 52,837 psi | 87% | 3041 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 53,795 psi | 88% | 3077 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,750 psi | 87% | 3061 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,678 psi | 86% | 3015 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,950 psi | 80% | 3163 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 53,505 psi | 88% | 3120 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 60% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,533 psi | 86% | 3015 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,823 psi | 87% | 3009 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 51,982 psi | 85% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,808 psi | 85% | 3005 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 55,100 psi | 90% | 3176 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 53,113 psi | 87% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,592 psi | 90% | 3051 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 3005 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 53,330 psi | 88% | 3071 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 53,055 psi | 87% | 3163 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 53,737 psi | 88% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,692 psi | 85% | 3127 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 88% | 52,692 psi | 87% | 3077 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,882 psi | 88% | 3127 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 62% | 1985 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,692 psi | 87% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 51,459 psi | 84% | 3054 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,403 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,400 psi | 81% | 3159 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 82% | 52,228 psi | 86% | 2989 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,882 psi | 88% | 3051 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 54,824 psi | 90% | 3117 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 54,665 psi | 90% | 3038 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,113 psi | 87% | 3005 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,592 psi | 90% | 3051 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,592 psi | 88% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,721 psi | 87% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,605 psi | 86% | 2956 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,375 psi | 89% | 3110 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 52,025 psi | 85% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,011 psi | 85% | 2982 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 53,635 psi | 88% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,025 psi | 85% | 3031 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 53,287 psi | 87% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,054 psi | 85% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,882 psi | 90% | 3064 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 54,708 psi | 90% | 3071 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,968 psi | 87% | 3091 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,084 psi | 87% | 3153 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,576 psi | 86% | 3123 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 51,576 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,534 psi | 88% | 3091 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,694 psi | 90% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,721 psi | 85% | 3022 fps | 98.4% |
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% | 31,096 psi | 51% | 2575 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 42,032 psi | 69% | 2858 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 48,327 psi | 79% | 3061 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,314 psi | 83% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,292 psi | 66% | 2835 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 43,772 psi | 72% | 2943 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,940 psi | 57% | 2776 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,111 psi | 84% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,335 psi | 66% | 2864 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,325 psi | 76% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,001 psi | 66% | 2828 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,985 psi | 62% | 2822 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,863 psi | 49% | 2608 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,863 psi | 49% | 2621 fps | 95% |
| Alliant Reloder-26 | 72.8 gr | 80% | 32,198 psi | 53% | 2733 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 40,248 psi | 66% | 2874 fps | 95.7% |
| Bofors RP30 | <<locked>> | 98% | 42,989 psi | 71% | 2969 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 37,985 psi | 62% | 2822 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,237 psi | 74% | 2861 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 43,105 psi | 71% | 2917 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,642 psi | 72% | 2900 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,456 psi | 76% | 2923 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 46,833 psi | 77% | 2949 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,919 psi | 75% | 2933 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,884 psi | 62% | 2743 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,623 psi | 62% | 2887 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,830 psi | 70% | 2920 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 45% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,814 psi | 67% | 2785 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,528 psi | 76% | 2890 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 40,016 psi | 66% | 2799 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,614 psi | 75% | 2887 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 45,020 psi | 74% | 2982 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 44,208 psi | 73% | 2841 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 42,438 psi | 70% | 2825 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 32,518 psi | 53% | 2615 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 40,567 psi | 67% | 2822 fps | 95.5% |
| Norma MRP | 72.5 gr | 82% | 34,708 psi | 57% | 2766 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,321 psi | 68% | 2844 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 41,771 psi | 69% | 2923 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 40,263 psi | 66% | 2835 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,130 psi | 61% | 2789 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 46% | 1775 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,168 psi | 81% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,785 psi | 69% | 2874 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,234 psi | 66% | 2887 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,563 psi | 57% | 2795 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,878 psi | 80% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,454 psi | 73% | 2874 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 39,276 psi | 64% | 2812 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,237 psi | 74% | 2861 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,208 psi | 73% | 2841 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 42,438 psi | 70% | 2825 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,241 psi | 82% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,545 psi | 81% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,236 psi | 71% | 2782 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,928 psi | 64% | 2805 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,950 psi | 80% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,513 psi | 75% | 2861 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,087 psi | 63% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,347 psi | 61% | 2733 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,789 psi | 77% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,844 psi | 70% | 2841 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,811 psi | 60% | 2713 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 42,163 psi | 69% | 2841 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,344 psi | 55% | 2687 fps | 98.3% |
| Vihtavuori N560 | 79.5 gr | 90% | 46,093 psi | 76% | 3018 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 45,774 psi | 75% | 2995 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,800 psi | 69% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,830 psi | 72% | 2907 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,498 psi | 44% | 2598 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,175 psi | 64% | 2776 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 72 powders for .300 Lapua Mag. loaded with the .308 | 165gr | Swift Scirocco. Winchester StaBALL HD delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,255 fps. ADI AR 2225 gives the best case fill at 100 %, and 72 of the 72 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 1:11.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Lapua Mag. with the .308 | 165gr | Swift Scirocco 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.