Load Specifications
Load data in caliber .300 Lapua Mag. with .307 | 165gr | Rhino Penetrator bullet and 74 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% | 53,490 psi | 88% | 3045 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,027 psi | 90% | 3091 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,824 psi | 90% | 3199 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 51,880 psi | 85% | 3130 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 53,388 psi | 88% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,330 psi | 86% | 3081 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 53,664 psi | 88% | 3140 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,682 psi | 65% | 2904 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,562 psi | 86% | 3077 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,447 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,330 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,258 psi | 87% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 51,924 psi | 85% | 3068 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,316 psi | 88% | 3136 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,157 psi | 89% | 3114 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,966 psi | 82% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,462 psi | 89% | 3205 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,286 psi | 86% | 3117 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,992 psi | 76% | 3028 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 53,316 psi | 88% | 3136 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 54,592 psi | 90% | 3035 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,356 psi | 81% | 3048 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 53,258 psi | 87% | 3084 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 52,765 psi | 87% | 3041 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 53,751 psi | 88% | 3077 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,692 psi | 87% | 3058 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,605 psi | 86% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,907 psi | 80% | 3159 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 53,447 psi | 88% | 3120 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 60% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,475 psi | 86% | 3015 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,750 psi | 87% | 3005 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 51,909 psi | 85% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,750 psi | 85% | 3005 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 54,839 psi | 90% | 3173 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 53,243 psi | 87% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,534 psi | 90% | 3048 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,995 psi | 84% | 3005 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 53,258 psi | 87% | 3071 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 53,011 psi | 87% | 3159 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 53,635 psi | 88% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,648 psi | 85% | 3123 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 88% | 52,591 psi | 86% | 3074 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,824 psi | 88% | 3127 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 61% | 1982 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,605 psi | 86% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,056 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,345 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,356 psi | 81% | 3159 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 82% | 52,141 psi | 86% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,824 psi | 88% | 3051 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 54,766 psi | 90% | 3117 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 54,592 psi | 90% | 3035 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,243 psi | 87% | 3005 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,534 psi | 90% | 3048 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,505 psi | 88% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,620 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,533 psi | 86% | 2953 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,317 psi | 89% | 3110 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 51,938 psi | 85% | 2979 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,967 psi | 85% | 2979 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 53,563 psi | 88% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 51,967 psi | 85% | 3031 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 84% | 53,214 psi | 87% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 51,982 psi | 85% | 3009 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,839 psi | 90% | 3064 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 54,650 psi | 90% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,895 psi | 87% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,040 psi | 87% | 3150 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,475 psi | 86% | 3120 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 51,532 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,476 psi | 88% | 3087 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,592 psi | 90% | 3251 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,677 psi | 85% | 3018 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% | 31,053 psi | 51% | 2575 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 41,945 psi | 69% | 2854 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 44,425 psi | 73% | 2999 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 92% | 48,269 psi | 79% | 3061 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,227 psi | 82% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,219 psi | 66% | 2835 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 43,729 psi | 72% | 2940 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,882 psi | 57% | 2772 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,350 psi | 66% | 2831 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,227 psi | 84% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,248 psi | 66% | 2861 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,253 psi | 76% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,943 psi | 66% | 2825 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,927 psi | 62% | 2818 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,834 psi | 49% | 2605 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,662 psi | 52% | 2677 fps | 96% |
| Alliant Reloder-26 | 72.7 gr | 80% | 32,140 psi | 53% | 2733 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 40,190 psi | 66% | 2871 fps | 95.6% |
| Bofors RP30 | <<locked>> | 98% | 42,917 psi | 70% | 2963 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 37,927 psi | 62% | 2818 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,150 psi | 74% | 2861 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 43,062 psi | 71% | 2917 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,613 psi | 72% | 2900 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,369 psi | 76% | 2920 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 46,789 psi | 77% | 2946 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,861 psi | 75% | 2930 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,956 psi | 62% | 2743 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,579 psi | 62% | 2887 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,743 psi | 70% | 2917 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,499 psi | 45% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,741 psi | 67% | 2785 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,456 psi | 76% | 2887 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 39,987 psi | 66% | 2799 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,556 psi | 75% | 2887 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 44,788 psi | 74% | 2979 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 44,121 psi | 72% | 2838 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 42,366 psi | 70% | 2822 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 32,474 psi | 53% | 2612 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 40,495 psi | 66% | 2818 fps | 95.5% |
| Norma MRP | 72.4 gr | 82% | 34,650 psi | 57% | 2766 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 41,263 psi | 68% | 2841 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 41,713 psi | 68% | 2920 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,205 psi | 66% | 2831 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,086 psi | 61% | 2789 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 46% | 1772 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,081 psi | 81% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,713 psi | 68% | 2871 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,161 psi | 66% | 2884 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,519 psi | 57% | 2795 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,776 psi | 80% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,396 psi | 73% | 2871 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 39,218 psi | 64% | 2808 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,150 psi | 74% | 2861 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,121 psi | 72% | 2838 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 42,366 psi | 70% | 2822 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,169 psi | 82% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,458 psi | 81% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,192 psi | 71% | 2779 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,856 psi | 64% | 2802 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,892 psi | 80% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,469 psi | 75% | 2858 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,000 psi | 62% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,289 psi | 61% | 2730 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,702 psi | 77% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,772 psi | 70% | 2838 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 36,753 psi | 60% | 2710 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 42,090 psi | 69% | 2841 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,257 psi | 55% | 2687 fps | 98.2% |
| Vihtavuori N560 | 79.4 gr | 90% | 46,035 psi | 76% | 3015 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 45,730 psi | 75% | 2992 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,742 psi | 69% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,743 psi | 72% | 2904 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,455 psi | 43% | 2592 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,117 psi | 64% | 2772 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 74 powders for .300 Lapua Mag. loaded with the .307 | 165gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 3,251 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,251 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 0.307" 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 .307 | 165gr | Rhino Penetrator 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.