Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 155gr | Norma Kalahari bullet and 76 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 ReloadSwiss RS 70.
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% | 52,199 psi | 86% | 3107 fps | 99.6% |
| Accurate 4350 | <<locked>> | 88% | 53,621 psi | 88% | 3156 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 53,330 psi | 88% | 3258 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 96% | 54,288 psi | 89% | 3258 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 52,460 psi | 86% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,665 psi | 90% | 3205 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 96% | 52,446 psi | 86% | 3199 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,754 psi | 64% | 2949 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,781 psi | 90% | 3202 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,359 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,389 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,866 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,070 psi | 89% | 3192 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 51,953 psi | 85% | 3196 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,605 psi | 86% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,631 psi | 80% | 3169 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,678 psi | 86% | 3268 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,447 psi | 89% | 3241 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 54,186 psi | 89% | 3117 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 51,953 psi | 85% | 3196 fps | 98.2% |
| Bofors RP7 | <<locked>> | 86% | 53,403 psi | 88% | 3100 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,283 psi | 79% | 3104 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 54,404 psi | 89% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,040 psi | 85% | 3150 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 55,042 psi | 90% | 3169 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 52,344 psi | 86% | 3133 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,071 psi | 90% | 3182 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,882 psi | 90% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,732 psi | 78% | 3215 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 86% | 52,170 psi | 86% | 3182 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 60% | 2005 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,650 psi | 90% | 3140 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,969 psi | 90% | 3130 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 54,288 psi | 89% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,954 psi | 89% | 3127 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 53,664 psi | 88% | 3235 fps | 97.3% |
| Lovex S065 | <<locked>> | 86% | 52,083 psi | 86% | 3074 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 53,403 psi | 88% | 3120 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,603 psi | 81% | 3064 fps | 99.4% |
| Norma 204 | <<locked>> | 88% | 51,895 psi | 85% | 3130 fps | 97.8% |
| Norma MRP | <<locked>> | 94% | 51,532 psi | 85% | 3222 fps | 99.2% |
| Norma URP | <<locked>> | 88% | 52,373 psi | 86% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,041 psi | 89% | 3251 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 54,810 psi | 90% | 3199 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,301 psi | 86% | 3182 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,186 psi | 89% | 3114 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,056 psi | 90% | 3232 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,708 psi | 88% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,982 psi | 85% | 3205 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,080 psi | 79% | 3212 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 54,447 psi | 89% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,707 psi | 87% | 3114 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 94% | 53,388 psi | 88% | 3176 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 86% | 53,403 psi | 88% | 3100 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,083 psi | 86% | 3074 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 53,403 psi | 88% | 3120 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,417 psi | 86% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,824 psi | 90% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,868 psi | 90% | 3077 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,011 psi | 87% | 3173 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 54,230 psi | 89% | 3107 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,331 psi | 89% | 3104 fps | 96.6% |
| Somchem S365 | <<locked>> | 90% | 52,083 psi | 86% | 3143 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,099 psi | 89% | 3153 fps | 99% |
| Vihtavuori N150 | <<locked>> | 84% | 52,098 psi | 86% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,230 psi | 89% | 3133 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,519 psi | 88% | 3123 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 88% | 53,548 psi | 88% | 3140 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,998 psi | 90% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 51,648 psi | 85% | 3209 fps | 96.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,068 psi | 84% | 3176 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,853 psi | 88% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,228 psi | 86% | 3153 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,678 psi | 86% | 3314 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,201 psi | 89% | 3146 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>> | 84% | 34,592 psi | 57% | 2743 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 40,698 psi | 67% | 2910 fps | 99% |
| Accurate High Country | <<locked>> | 90% | 46,166 psi | 76% | 3117 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 50,589 psi | 83% | 3186 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,211 psi | 81% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,887 psi | 69% | 2949 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 92% | 45,803 psi | 75% | 3061 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 36,274 psi | 60% | 2881 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,119 psi | 69% | 2953 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,067 psi | 82% | 3045 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,247 psi | 64% | 2920 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,976 psi | 74% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,684 psi | 68% | 2943 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,279 psi | 69% | 2999 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,979 psi | 48% | 2651 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,953 psi | 54% | 2785 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,256 psi | 51% | 2776 fps | 95.9% |
| Bofors RP15 | <<locked>> | 92% | 41,698 psi | 68% | 2986 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,763 psi | 83% | 3058 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,279 psi | 69% | 2999 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,193 psi | 73% | 2923 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 44,933 psi | 74% | 3035 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,865 psi | 84% | 3071 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,511 psi | 70% | 2959 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 45,368 psi | 74% | 2982 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 48,994 psi | 80% | 3071 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,066 psi | 79% | 3054 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,927 psi | 61% | 2802 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,160 psi | 64% | 3002 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,582 psi | 68% | 2972 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 45% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,740 psi | 65% | 2841 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,658 psi | 75% | 2953 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 39,044 psi | 64% | 2858 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,471 psi | 78% | 3005 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 46,818 psi | 77% | 3097 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 43,178 psi | 71% | 2900 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 41,495 psi | 68% | 2881 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 33,620 psi | 55% | 2717 fps | 95.6% |
| Norma 204 | <<locked>> | 82% | 42,337 psi | 70% | 2936 fps | 95.4% |
| Norma MRP | 75.8 gr | 84% | 36,056 psi | 59% | 2877 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,306 psi | 66% | 2904 fps | 98.9% |
| Ramshot Grand | <<locked>> | 94% | 46,876 psi | 77% | 3114 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 39,175 psi | 64% | 2887 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 38,841 psi | 64% | 2904 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 46% | 1837 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,763 psi | 83% | 3054 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,732 psi | 78% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,524 psi | 67% | 2927 fps | 98.8% |
| ReloadSwiss RS 70 | 73.7 gr | 80% | 39,073 psi | 64% | 2936 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,172 psi | 59% | 2910 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 47,805 psi | 78% | 3002 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,369 psi | 76% | 2992 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 40,785 psi | 67% | 2923 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,193 psi | 73% | 2923 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,178 psi | 71% | 2900 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 41,495 psi | 68% | 2881 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,008 psi | 80% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,544 psi | 80% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,351 psi | 70% | 2841 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,422 psi | 66% | 2917 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,776 psi | 78% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,500 psi | 78% | 2976 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,782 psi | 60% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,914 psi | 64% | 2848 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 45,774 psi | 75% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,655 psi | 68% | 2900 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 38,261 psi | 63% | 2822 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 41,118 psi | 68% | 2900 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,343 psi | 53% | 2736 fps | 97.4% |
| Vihtavuori N560 | 83.1 gr | 92% | 48,196 psi | 79% | 3140 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 47,645 psi | 78% | 3110 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,799 psi | 67% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,685 psi | 70% | 2963 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,715 psi | 42% | 2625 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,901 psi | 67% | 2887 fps | 95.2% |
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 76 powders for .300 Lapua Mag. loaded with the .308 | 155gr | Norma Kalahari. Winchester StaBALL HD delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,314 fps. ADI AR 2225 gives the best case fill at 100 %, and 76 of the 76 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 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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, ReloadSwiss RS 70 rank at the top here: for .300 Lapua Mag. with the .308 | 155gr | Norma Kalahari 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.