Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 136gr | Peregrine Plainsmaster (VLR-4) bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, ADI AR 2213 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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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% | 56,173 psi | 86% | 3133 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 58,233 psi | 90% | 3123 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,971 psi | 88% | 3182 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,056 psi | 85% | 3215 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 58,247 psi | 90% | 3163 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 58,610 psi | 90% | 3238 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 56,536 psi | 87% | 3232 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,916 psi | 65% | 2982 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 58,798 psi | 90% | 3232 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,651 psi | 86% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 58,088 psi | 89% | 3248 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,492 psi | 85% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 58,030 psi | 89% | 3222 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,289 psi | 87% | 3225 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,348 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,113 psi | 82% | 3196 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 58,465 psi | 90% | 3294 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,201 psi | 85% | 3205 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 56,855 psi | 88% | 3146 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,994 psi | 75% | 3110 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 56,289 psi | 87% | 3225 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 55,956 psi | 86% | 3133 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,170 psi | 80% | 3136 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,971 psi | 88% | 3166 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,317 psi | 85% | 3182 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 58,015 psi | 89% | 3199 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 56,304 psi | 87% | 3166 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,071 psi | 85% | 3146 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 58,421 psi | 90% | 3163 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,924 psi | 80% | 3251 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 56,449 psi | 87% | 3212 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 56% | 2093 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,377 psi | 88% | 3146 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,899 psi | 89% | 3169 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,551 psi | 89% | 3163 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 57,580 psi | 89% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,348 psi | 88% | 3156 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 58,131 psi | 89% | 3268 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 57,754 psi | 89% | 3136 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 58,030 psi | 89% | 3156 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,144 psi | 86% | 3146 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,258 psi | 82% | 3087 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 58,769 psi | 90% | 3192 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,332 psi | 85% | 3166 fps | 98.3% |
| Norma MRP | <<locked>> | 94% | 56,275 psi | 87% | 3248 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,506 psi | 85% | 3169 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,897 psi | 84% | 3219 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 58,537 psi | 90% | 3225 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 58,030 psi | 89% | 3215 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,217 psi | 57% | 2139 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,913 psi | 88% | 3146 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,795 psi | 84% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,580 psi | 89% | 3205 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,028 psi | 86% | 3232 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,316 psi | 82% | 3248 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 56,913 psi | 88% | 3143 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,869 psi | 86% | 3143 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 57,334 psi | 88% | 3209 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 55,956 psi | 86% | 3133 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 58,030 psi | 89% | 3156 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,754 psi | 89% | 3136 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,144 psi | 86% | 3146 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,245 psi | 85% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,174 psi | 88% | 3022 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,653 psi | 89% | 3104 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,869 psi | 88% | 3205 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 56,710 psi | 87% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 58,073 psi | 89% | 3127 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,927 psi | 86% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,827 psi | 89% | 3176 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 58,233 psi | 90% | 3107 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,435 psi | 88% | 3163 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,740 psi | 89% | 3150 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,869 psi | 88% | 3166 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,361 psi | 85% | 3176 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,115 psi | 86% | 3238 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,956 psi | 86% | 3202 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,740 psi | 89% | 3114 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,506 psi | 85% | 3182 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,085 psi | 85% | 3274 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 58,552 psi | 90% | 3176 fps | 98.9% |
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% | 33,765 psi | 52% | 2697 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 54,447 psi | 84% | 3071 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,656 psi | 66% | 2936 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 51,140 psi | 79% | 3146 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,198 psi | 79% | 3054 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 44,295 psi | 68% | 2982 fps | 95.8% |
| ADI AR 2213 | 88.8 gr | 92% | 48,907 psi | 75% | 3097 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 96% | 36,521 psi | 56% | 2844 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 44,570 psi | 69% | 2979 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,214 psi | 80% | 3077 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,046 psi | 63% | 2949 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,747 psi | 73% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 44,063 psi | 68% | 2969 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,177 psi | 65% | 2963 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,182 psi | 46% | 2667 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,532 psi | 50% | 2743 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,170 psi | 51% | 2792 fps | 96.2% |
| Bofors RP15 | <<locked>> | 90% | 41,742 psi | 64% | 2949 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 52,910 psi | 81% | 3087 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 45,542 psi | 70% | 3045 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 42,177 psi | 65% | 2963 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 45,919 psi | 71% | 2956 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 96% | 45,165 psi | 70% | 3002 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 53,272 psi | 82% | 3107 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 44,744 psi | 69% | 2989 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 47,326 psi | 73% | 3015 fps | 97% |
| Hodgdon H4831 | <<locked>> | 90% | 48,747 psi | 75% | 3035 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,358 psi | 79% | 3084 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,537 psi | 59% | 2828 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,061 psi | 65% | 3038 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,527 psi | 69% | 3002 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 42% | 1883 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,853 psi | 83% | 3091 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,524 psi | 64% | 2871 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,456 psi | 73% | 2989 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 40,741 psi | 63% | 2881 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 50,285 psi | 77% | 3035 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 92% | 46,760 psi | 72% | 3061 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 54,027 psi | 83% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,715 psi | 69% | 2927 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 43,120 psi | 66% | 2910 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 35,346 psi | 54% | 2736 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 54,998 psi | 85% | 3136 fps | 100% |
| Norma 204 | <<locked>> | 82% | 44,657 psi | 69% | 2969 fps | 95.8% |
| Norma MRP | <<locked>> | 84% | 38,493 psi | 59% | 2904 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 42,177 psi | 65% | 2930 fps | 98.9% |
| Ramshot Grand | <<locked>> | 92% | 46,963 psi | 72% | 3074 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,205 psi | 63% | 2913 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 90% | 38,885 psi | 60% | 2861 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,659 psi | 43% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,142 psi | 82% | 3087 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,749 psi | 78% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,960 psi | 66% | 2956 fps | 99% |
| ReloadSwiss RS 70 | 81.4 gr | 80% | 41,452 psi | 64% | 2966 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,943 psi | 60% | 2940 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,792 psi | 77% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,701 psi | 70% | 2959 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 43,265 psi | 67% | 2953 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,919 psi | 71% | 2956 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,715 psi | 69% | 2927 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 54,027 psi | 83% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,120 psi | 66% | 2910 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,474 psi | 79% | 3087 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,096 psi | 77% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,961 psi | 68% | 2871 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,888 psi | 66% | 2949 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 49,603 psi | 76% | 3028 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,459 psi | 78% | 3002 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 38,914 psi | 60% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 40,944 psi | 63% | 2871 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 47,674 psi | 73% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,613 psi | 67% | 2930 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 40,640 psi | 63% | 2848 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 43,178 psi | 66% | 2927 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 33,794 psi | 52% | 2756 fps | 97.3% |
| Vihtavuori N560 | 89.7 gr | 90% | 48,414 psi | 75% | 3100 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 48,414 psi | 75% | 3071 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,105 psi | 66% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,904 psi | 69% | 2992 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,803 psi | 41% | 2638 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,671 psi | 67% | 2917 fps | 95.8% |
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 | 136gr | Peregrine Plainsmaster (VLR-4). Alliant Reloder-26 delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,294 fps. ADI AR 2225 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 136.0 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 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. Vihtavuori N560, ADI AR 2213, ReloadSwiss RS 70 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 136gr | Peregrine Plainsmaster (VLR-4) 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.