Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 140gr | Peregrine VLR5 (VLR-5) bullet and 81 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 IMR 7828 SSC.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,377 psi | 88% | 3120 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,146 psi | 89% | 3166 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,318 psi | 87% | 3205 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,390 psi | 85% | 3091 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,767 psi | 86% | 3163 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 57,711 psi | 89% | 3222 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,225 psi | 74% | 3031 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,859 psi | 66% | 2976 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,028 psi | 86% | 3159 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,028 psi | 86% | 3159 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,608 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,477 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,681 psi | 87% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,317 psi | 85% | 3146 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,508 psi | 89% | 3215 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,624 psi | 90% | 3189 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,346 psi | 84% | 3186 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,448 psi | 85% | 3215 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,449 psi | 87% | 3196 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 57,899 psi | 89% | 3127 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,227 psi | 77% | 3104 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 57,508 psi | 89% | 3215 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,884 psi | 88% | 3117 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,316 psi | 82% | 3130 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 57,957 psi | 89% | 3143 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 56,391 psi | 87% | 3166 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 55,274 psi | 85% | 3123 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 57,406 psi | 88% | 3156 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,159 psi | 86% | 3136 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,796 psi | 86% | 3094 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,156 psi | 82% | 3241 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 57,638 psi | 89% | 3199 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 56% | 2070 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 58,291 psi | 90% | 3127 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,201 psi | 85% | 3097 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 58,653 psi | 90% | 3146 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 58,697 psi | 90% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,349 psi | 90% | 3143 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,274 psi | 85% | 3192 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 58,697 psi | 90% | 3117 fps | 100% |
| Lovex S065 | <<locked>> | 86% | 55,288 psi | 85% | 3084 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 57,130 psi | 88% | 3130 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,418 psi | 84% | 3074 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 56,391 psi | 87% | 3150 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 57,566 psi | 89% | 3238 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,579 psi | 87% | 3153 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,202 psi | 86% | 3209 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,811 psi | 86% | 3153 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 54,868 psi | 84% | 3136 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 57% | 2116 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,870 psi | 89% | 3130 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,043 psi | 86% | 3179 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 58,784 psi | 90% | 3189 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,290 psi | 88% | 3219 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,636 psi | 84% | 3241 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 58,175 psi | 90% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,869 psi | 88% | 3130 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 58,494 psi | 90% | 3196 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,884 psi | 88% | 3117 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,288 psi | 85% | 3084 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 58,697 psi | 90% | 3117 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,130 psi | 88% | 3130 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,246 psi | 87% | 3127 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 58,059 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 58,595 psi | 90% | 3091 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 58,044 psi | 89% | 3189 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 57,725 psi | 89% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,230 psi | 85% | 3054 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 57,145 psi | 88% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,129 psi | 85% | 3104 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 55,593 psi | 86% | 3038 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 58,523 psi | 90% | 3143 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,998 psi | 85% | 3081 fps | 99% |
| Vihtavuori N550 | <<locked>> | 88% | 57,928 psi | 89% | 3146 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,579 psi | 87% | 3163 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,348 psi | 88% | 3228 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,232 psi | 88% | 3196 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,839 psi | 84% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,623 psi | 87% | 3169 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,681 psi | 87% | 3264 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,405 psi | 85% | 3097 fps | 98.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 34,563 psi | 53% | 2687 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 43,613 psi | 67% | 2927 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 90% | 48,573 psi | 75% | 3071 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 52,025 psi | 80% | 3035 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,105 psi | 65% | 2907 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 46,499 psi | 72% | 3018 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 44,904 psi | 69% | 2963 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 37,347 psi | 57% | 2841 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,409 psi | 65% | 2907 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 42,409 psi | 65% | 2907 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,127 psi | 82% | 3058 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,916 psi | 65% | 2940 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,820 psi | 75% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,989 psi | 65% | 2897 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,190 psi | 62% | 2887 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,893 psi | 48% | 2661 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,257 psi | 51% | 2736 fps | 95.9% |
| Alliant Reloder-26 | 82.1 gr | 80% | 34,040 psi | 52% | 2792 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 42,699 psi | 66% | 2943 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 53,896 psi | 83% | 3068 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 43,410 psi | 67% | 2972 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 40,190 psi | 62% | 2887 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,702 psi | 72% | 2940 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 94% | 42,960 psi | 66% | 2927 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 54,215 psi | 83% | 3087 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,643 psi | 70% | 2979 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 48,196 psi | 74% | 2999 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 49,734 psi | 77% | 3025 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,849 psi | 75% | 3009 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,378 psi | 61% | 2815 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,958 psi | 61% | 2956 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,513 psi | 70% | 2992 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 42% | 1860 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,737 psi | 84% | 3071 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,293 psi | 65% | 2861 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,240 psi | 74% | 2972 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 41,611 psi | 64% | 2867 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,921 psi | 74% | 2966 fps | 95.5% |
| IMR 7828 SSC | 88.2 gr | 92% | 47,761 psi | 74% | 3054 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 54,940 psi | 85% | 3061 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,498 psi | 70% | 2913 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 43,918 psi | 68% | 2897 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 33,779 psi | 52% | 2667 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,308 psi | 65% | 2887 fps | 95.3% |
| Norma MRP | <<locked>> | 82% | 36,521 psi | 56% | 2828 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 43,047 psi | 66% | 2920 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 44,469 psi | 68% | 2995 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,076 psi | 65% | 2904 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 39,813 psi | 61% | 2858 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 43% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,041 psi | 83% | 3071 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,909 psi | 80% | 3120 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,932 psi | 68% | 2943 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,351 psi | 65% | 2956 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 37,014 psi | 57% | 2864 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 50,720 psi | 78% | 3015 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,557 psi | 72% | 2946 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 41,176 psi | 63% | 2881 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,702 psi | 72% | 2940 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,498 psi | 70% | 2913 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 54,940 psi | 85% | 3061 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,918 psi | 68% | 2897 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,431 psi | 81% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,082 psi | 79% | 2907 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,744 psi | 69% | 2858 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,828 psi | 63% | 2874 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,488 psi | 78% | 3009 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,964 psi | 74% | 2930 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 39,842 psi | 61% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 39,015 psi | 60% | 2799 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 48,530 psi | 75% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,469 psi | 68% | 2917 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 38,711 psi | 60% | 2776 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,019 psi | 68% | 2913 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,635 psi | 53% | 2746 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 90% | 49,516 psi | 76% | 3094 fps | 96% |
| Vihtavuori N565 | <<locked>> | 94% | 46,050 psi | 71% | 2995 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,976 psi | 68% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,803 psi | 70% | 2982 fps | 98.1% |
| Winchester StaBALL HD | 78.9 gr | 80% | 27,456 psi | 42% | 2641 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,394 psi | 64% | 2844 fps | 95.4% |
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 81 powders for .300 Rem. Ultra Mag. loaded with the .308 | 140gr | Peregrine VLR5 (VLR-5). Winchester StaBALL HD delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,264 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:12.5 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, IMR 7828 SSC rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 140gr | Peregrine VLR5 (VLR-5) 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.