Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 150gr | Speer Boat-Tail bullet and 79 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 2700 | <<locked>> | 82% | 54,273 psi | 89% | 3114 fps | 98.5% |
| Accurate 3100 | <<locked>> | 98% | 53,069 psi | 87% | 3163 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 53,882 psi | 88% | 3107 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,897 psi | 90% | 3222 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,114 psi | 89% | 3310 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 53,751 psi | 88% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,127 psi | 86% | 3199 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 98% | 53,548 psi | 88% | 3255 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,417 psi | 86% | 3199 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,563 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,752 psi | 90% | 3186 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,040 psi | 85% | 3225 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,127 psi | 87% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 51,735 psi | 85% | 3189 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,765 psi | 87% | 3251 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,243 psi | 87% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,253 psi | 76% | 3156 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,548 psi | 88% | 3327 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,576 psi | 85% | 3228 fps | 97.6% |
| Bofors RP3 | <<locked>> | 82% | 51,866 psi | 85% | 3123 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,765 psi | 87% | 3251 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 54,810 psi | 90% | 3163 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 82% | 52,228 psi | 86% | 3140 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 88% | 53,200 psi | 87% | 3212 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 52,953 psi | 87% | 3169 fps | 98% |
| Hodgdon H4831 | <<locked>> | 96% | 53,621 psi | 88% | 3196 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,286 psi | 86% | 3140 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,237 psi | 74% | 3192 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 88% | 53,417 psi | 88% | 3245 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 60% | 2024 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,055 psi | 87% | 3117 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,634 psi | 86% | 3143 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,026 psi | 87% | 3133 fps | 98.9% |
| IMR 4831 | <<locked>> | 90% | 51,808 psi | 85% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,085 psi | 90% | 3182 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,534 psi | 90% | 3287 fps | 97% |
| Lovex S062 | <<locked>> | 82% | 53,447 psi | 88% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,374 psi | 88% | 3133 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 54,491 psi | 89% | 3176 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,166 psi | 77% | 3058 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 54,114 psi | 89% | 3173 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,243 psi | 87% | 3192 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 52,228 psi | 86% | 3274 fps | 99% |
| Norma URP | <<locked>> | 90% | 53,374 psi | 88% | 3199 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,810 psi | 90% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,401 psi | 84% | 3238 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 90% | 52,402 psi | 86% | 3199 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,501 psi | 81% | 3169 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 61% | 2070 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,185 psi | 86% | 3120 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,518 psi | 86% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,665 psi | 90% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,229 psi | 87% | 3271 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,440 psi | 75% | 3186 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 84% | 52,141 psi | 86% | 3120 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,737 psi | 88% | 3166 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,534 psi | 90% | 3235 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 54,810 psi | 90% | 3163 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,374 psi | 88% | 3133 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 53,447 psi | 88% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,491 psi | 89% | 3176 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,606 psi | 88% | 3182 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,939 psi | 87% | 3002 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,721 psi | 87% | 3077 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,070 psi | 89% | 3232 fps | 98.1% |
| Somchem S355 | <<locked>> | 84% | 52,083 psi | 86% | 3117 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 53,084 psi | 87% | 3205 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 51,547 psi | 85% | 3146 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 86% | 53,374 psi | 88% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,040 psi | 85% | 3140 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,520 psi | 90% | 3179 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 54,157 psi | 89% | 3091 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,592 psi | 90% | 3196 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,344 psi | 86% | 3212 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,489 psi | 86% | 3261 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 51,561 psi | 85% | 3100 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,403 psi | 88% | 3215 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,849 psi | 80% | 3307 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,459 psi | 84% | 3136 fps | 97.5% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 50,749 psi | 83% | 3051 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 35,099 psi | 58% | 2792 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 50,517 psi | 83% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,769 psi | 64% | 2907 fps | 98.4% |
| Accurate High Country | <<locked>> | 92% | 47,079 psi | 77% | 3176 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,442 psi | 78% | 3025 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 42,859 psi | 70% | 3005 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 50,067 psi | 82% | 3186 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,033 psi | 71% | 3009 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,138 psi | 79% | 3051 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,387 psi | 84% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,521 psi | 62% | 2913 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,786 psi | 70% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,554 psi | 70% | 3002 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,960 psi | 71% | 3054 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,615 psi | 45% | 2641 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,562 psi | 55% | 2835 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 82% | 31,821 psi | 52% | 2828 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 42,366 psi | 70% | 3035 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,573 psi | 80% | 3064 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,960 psi | 71% | 3054 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,511 psi | 70% | 2920 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,965 psi | 80% | 3077 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,741 psi | 67% | 2956 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 43,468 psi | 71% | 2979 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 94% | 50,154 psi | 82% | 3127 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,143 psi | 58% | 2799 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,366 psi | 70% | 3120 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 39,726 psi | 65% | 2963 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 45% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,893 psi | 82% | 3061 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 40,756 psi | 67% | 2900 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,005 psi | 72% | 2956 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 37,115 psi | 61% | 2851 fps | 98% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,704 psi | 80% | 3064 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 47,659 psi | 78% | 3150 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,111 psi | 82% | 3058 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,524 psi | 68% | 2900 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,682 psi | 65% | 2877 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 33,982 psi | 56% | 2762 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 50,734 psi | 83% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,279 psi | 71% | 2995 fps | 95.2% |
| Norma MRP | <<locked>> | 88% | 39,363 psi | 65% | 3002 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 38,348 psi | 63% | 2897 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,227 psi | 84% | 3136 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,732 psi | 78% | 3163 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,304 psi | 61% | 2881 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 94% | 39,595 psi | 65% | 2953 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 45% | 1854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,791 psi | 80% | 3058 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,426 psi | 75% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,522 psi | 63% | 2923 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,318 psi | 61% | 2927 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,450 psi | 65% | 3031 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 45,643 psi | 75% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,326 psi | 78% | 3048 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 41,626 psi | 68% | 2979 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,511 psi | 70% | 2920 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,524 psi | 68% | 2900 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 50,111 psi | 82% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,682 psi | 65% | 2877 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,920 psi | 77% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,775 psi | 77% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,596 psi | 67% | 2838 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,121 psi | 72% | 3038 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 45,905 psi | 75% | 3002 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 34,896 psi | 57% | 2851 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,639 psi | 65% | 2900 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 43,801 psi | 72% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,856 psi | 65% | 2897 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,756 psi | 69% | 2936 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,865 psi | 84% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,378 psi | 65% | 2897 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,487 psi | 50% | 2723 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 94% | 48,907 psi | 80% | 3192 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,088 psi | 64% | 2864 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,741 psi | 67% | 2956 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,165 psi | 43% | 2671 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,831 psi | 74% | 3009 fps | 95.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .300 Lapua Mag. loaded with the .308 | 150gr | Speer Boat-Tail. Alliant Reloder-26 delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,327 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 79 of the 79 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 150.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.