Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 130gr | Barnes TTSX BT bullet and 86 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-16.
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 2700 | <<locked>> | 82% | 58,059 psi | 89% | 3179 fps | 99% |
| Accurate 3100 | <<locked>> | 96% | 55,071 psi | 85% | 3163 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,392 psi | 88% | 3166 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,072 psi | 86% | 3222 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,855 psi | 88% | 3317 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 58,204 psi | 90% | 3314 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 57,276 psi | 88% | 3202 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,638 psi | 89% | 3271 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,477 psi | 85% | 3261 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,176 psi | 63% | 3002 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,827 psi | 89% | 3264 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 58,581 psi | 90% | 3225 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 58,624 psi | 90% | 3251 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,956 psi | 88% | 3287 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 58,740 psi | 90% | 3304 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,072 psi | 88% | 3258 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,201 psi | 85% | 3255 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,202 psi | 86% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,996 psi | 80% | 3222 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,246 psi | 88% | 3327 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 58,001 psi | 89% | 3297 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 55,767 psi | 86% | 3182 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,051 psi | 74% | 3136 fps | 96.2% |
| Bofors RP5 | <<locked>> | 96% | 55,201 psi | 85% | 3255 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 55,129 psi | 85% | 3169 fps | 98.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,314 psi | 79% | 3166 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 56,101 psi | 86% | 3202 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,305 psi | 90% | 3278 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 57,058 psi | 88% | 3232 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 94% | 55,303 psi | 85% | 3196 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,218 psi | 90% | 3245 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,305 psi | 88% | 3199 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,966 psi | 78% | 3274 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,405 psi | 85% | 3245 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 56% | 2136 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,623 psi | 87% | 3186 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,942 psi | 88% | 3202 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,913 psi | 88% | 3202 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 56,492 psi | 87% | 3209 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,507 psi | 87% | 3189 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 56,942 psi | 88% | 3294 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 56,782 psi | 87% | 3176 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,159 psi | 88% | 3192 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,390 psi | 85% | 3182 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,243 psi | 80% | 3117 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 57,928 psi | 89% | 3235 fps | 100% |
| Norma 204 | <<locked>> | 90% | 58,363 psi | 90% | 3258 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 55,085 psi | 85% | 3278 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 58,523 psi | 90% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 58,059 psi | 89% | 3317 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 57,595 psi | 89% | 3258 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,782 psi | 87% | 3241 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 57% | 2185 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,043 psi | 86% | 3182 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,146 psi | 89% | 3297 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,405 psi | 87% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,013 psi | 85% | 3268 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,199 psi | 80% | 3274 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 58,508 psi | 90% | 3189 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 55,985 psi | 86% | 3182 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,027 psi | 85% | 3176 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,347 psi | 87% | 3241 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 55,129 psi | 85% | 3169 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,159 psi | 88% | 3192 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,782 psi | 87% | 3176 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,390 psi | 85% | 3182 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,247 psi | 90% | 3245 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,289 psi | 87% | 3064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,913 psi | 88% | 3143 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,883 psi | 86% | 3235 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 55,898 psi | 86% | 3179 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,116 psi | 88% | 3159 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 54,766 psi | 84% | 3205 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,029 psi | 88% | 3212 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 57,334 psi | 88% | 3146 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,608 psi | 87% | 3199 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,666 psi | 87% | 3182 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 58,001 psi | 89% | 3150 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,825 psi | 86% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 58,233 psi | 90% | 3268 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,013 psi | 85% | 3264 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,897 psi | 84% | 3232 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,797 psi | 87% | 3150 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 58,494 psi | 90% | 3281 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 58,363 psi | 90% | 3376 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,421 psi | 88% | 3205 fps | 98.6% |
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 2700 | <<locked>> | 80% | 54,201 psi | 83% | 3117 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 35,563 psi | 55% | 2782 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 53,664 psi | 83% | 3110 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,872 psi | 64% | 2969 fps | 98.7% |
| Accurate High Country | <<locked>> | 90% | 49,052 psi | 75% | 3176 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 94% | 54,085 psi | 83% | 3241 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,401 psi | 78% | 3091 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 86% | 43,482 psi | 67% | 3009 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 48,051 psi | 74% | 3120 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 38,319 psi | 59% | 2927 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 43,743 psi | 67% | 3009 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,314 psi | 79% | 3117 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,897 psi | 84% | 3196 fps | 100% |
| Alliant Reloder-16 | 75.2 gr | 80% | 40,205 psi | 62% | 2979 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,818 psi | 72% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,279 psi | 67% | 2999 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,599 psi | 69% | 3058 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,617 psi | 46% | 2690 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,156 psi | 53% | 2828 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,387 psi | 50% | 2812 fps | 95.3% |
| Bofors RP15 | <<locked>> | 92% | 43,976 psi | 68% | 3041 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 52,112 psi | 80% | 3127 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,498 psi | 68% | 3064 fps | 95% |
| Bofors RP5 | <<locked>> | 90% | 44,599 psi | 69% | 3058 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 45,150 psi | 69% | 2989 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 96% | 44,338 psi | 68% | 3025 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 52,286 psi | 80% | 3140 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,976 psi | 68% | 3022 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 46,644 psi | 72% | 3045 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 92% | 51,576 psi | 79% | 3133 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,488 psi | 78% | 3114 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,739 psi | 58% | 2858 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,234 psi | 63% | 3054 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,569 psi | 67% | 3025 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1923 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,011 psi | 82% | 3130 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,770 psi | 63% | 2900 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,673 psi | 72% | 3022 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 39,914 psi | 61% | 2907 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,429 psi | 76% | 3064 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 49,443 psi | 76% | 3159 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,345 psi | 82% | 3123 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,092 psi | 68% | 2963 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 42,322 psi | 65% | 2936 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 37,101 psi | 57% | 2818 fps | 96% |
| Norma 203B | <<locked>> | 80% | 54,215 psi | 83% | 3179 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,859 psi | 68% | 2995 fps | 95.1% |
| Norma MRP | 86.7 gr | 86% | 40,712 psi | 63% | 2999 fps | 96% |
| Norma URP | <<locked>> | 80% | 41,336 psi | 64% | 2959 fps | 98.5% |
| Ramshot Grand | <<locked>> | 92% | 45,992 psi | 71% | 3094 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 40,480 psi | 62% | 2943 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 92% | 41,278 psi | 64% | 2959 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 42% | 1969 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,344 psi | 81% | 3120 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,748 psi | 77% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,974 psi | 65% | 2982 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,654 psi | 63% | 2995 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,276 psi | 59% | 2959 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 54,955 psi | 85% | 3140 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,849 psi | 75% | 3068 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,095 psi | 74% | 3051 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 42,438 psi | 65% | 2982 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,150 psi | 69% | 2989 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,092 psi | 68% | 2963 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 53,345 psi | 82% | 3123 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,322 psi | 65% | 2936 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,676 psi | 78% | 3127 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,530 psi | 76% | 2969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,192 psi | 66% | 2900 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 45,165 psi | 70% | 3038 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 48,950 psi | 75% | 3068 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,661 psi | 76% | 3031 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,000 psi | 58% | 2907 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 40,176 psi | 62% | 2897 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,847 psi | 72% | 2986 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,902 psi | 66% | 2963 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 42,844 psi | 66% | 2936 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 54,186 psi | 83% | 3094 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,308 psi | 65% | 2956 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 33,011 psi | 51% | 2776 fps | 96.6% |
| Vihtavuori N560 | 92.7 gr | 92% | 51,097 psi | 79% | 3196 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 47,369 psi | 73% | 3094 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,308 psi | 65% | 2917 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 44,150 psi | 68% | 3022 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,266 psi | 40% | 2651 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,772 psi | 66% | 2943 fps | 95.1% |
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 86 powders for .300 Rem. Ultra Mag. loaded with the .308 | 130gr | Barnes TTSX BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,376 fps; across all powders the maximum-charge window runs from 2,136 fps to 3,376 fps. ADI AR 2225 gives the best case fill at 100 %, and 86 of the 86 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 130.0 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, Alliant Reloder-16 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 130gr | Barnes TTSX BT 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.