Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 132gr | Brenneke TIG nature bullet and 84 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 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 2700 | <<locked>> | 82% | 58,117 psi | 89% | 3166 fps | 99.1% |
| Accurate 3100 | <<locked>> | 96% | 55,085 psi | 85% | 3150 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,392 psi | 88% | 3150 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,956 psi | 86% | 3205 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 58,117 psi | 89% | 3297 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 57,305 psi | 88% | 3189 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,638 psi | 89% | 3258 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 55,506 psi | 85% | 3248 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,075 psi | 63% | 2989 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 58,624 psi | 90% | 3209 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 58,653 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,058 psi | 88% | 3271 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 58,668 psi | 90% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,884 psi | 88% | 3238 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,259 psi | 85% | 3241 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,028 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,069 psi | 80% | 3212 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,116 psi | 88% | 3310 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,899 psi | 89% | 3281 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 55,811 psi | 86% | 3166 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,921 psi | 74% | 3123 fps | 96.2% |
| Bofors RP5 | <<locked>> | 96% | 55,259 psi | 85% | 3241 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 58,769 psi | 90% | 3212 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,213 psi | 79% | 3150 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 56,159 psi | 86% | 3189 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,247 psi | 90% | 3264 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,174 psi | 88% | 3222 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,361 psi | 85% | 3186 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,262 psi | 90% | 3228 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,450 psi | 88% | 3189 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,850 psi | 78% | 3261 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 86% | 55,230 psi | 85% | 3228 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 56% | 2119 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,623 psi | 87% | 3173 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,869 psi | 88% | 3186 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,782 psi | 87% | 3186 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 56,623 psi | 87% | 3199 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,521 psi | 87% | 3176 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 57,029 psi | 88% | 3284 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 56,782 psi | 87% | 3159 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,232 psi | 88% | 3179 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,303 psi | 85% | 3169 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,257 psi | 80% | 3107 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 57,972 psi | 89% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 90% | 58,320 psi | 90% | 3245 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 55,100 psi | 85% | 3268 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 58,436 psi | 90% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,943 psi | 89% | 3301 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 57,537 psi | 89% | 3245 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,753 psi | 87% | 3228 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 57% | 2169 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,927 psi | 86% | 3166 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,030 psi | 89% | 3281 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,391 psi | 87% | 3225 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,969 psi | 85% | 3251 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,170 psi | 80% | 3258 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 82% | 58,494 psi | 90% | 3173 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 56,043 psi | 86% | 3166 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,984 psi | 85% | 3163 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,347 psi | 87% | 3225 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 58,769 psi | 90% | 3212 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,232 psi | 88% | 3179 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,782 psi | 87% | 3159 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,303 psi | 85% | 3169 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,146 psi | 89% | 3228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,275 psi | 87% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,811 psi | 87% | 3127 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,898 psi | 86% | 3222 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 55,753 psi | 86% | 3159 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,188 psi | 88% | 3146 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 58,697 psi | 90% | 3245 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,869 psi | 88% | 3196 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 57,421 psi | 88% | 3133 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,550 psi | 87% | 3182 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,739 psi | 87% | 3169 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 58,044 psi | 89% | 3133 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,767 psi | 86% | 3182 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 58,204 psi | 90% | 3255 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,027 psi | 85% | 3255 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,824 psi | 84% | 3219 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,826 psi | 87% | 3136 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 58,450 psi | 90% | 3264 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 58,262 psi | 90% | 3360 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,508 psi | 89% | 3192 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% | 54,244 psi | 83% | 3104 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 35,578 psi | 55% | 2769 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 53,650 psi | 83% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,742 psi | 64% | 2953 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 94% | 53,969 psi | 83% | 3228 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 50,357 psi | 78% | 3077 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 43,381 psi | 67% | 2992 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 48,037 psi | 74% | 3110 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 38,377 psi | 59% | 2920 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,285 psi | 79% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,694 psi | 84% | 3176 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,219 psi | 62% | 2966 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,891 psi | 72% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,337 psi | 67% | 2989 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,556 psi | 69% | 3045 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,602 psi | 46% | 2680 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,113 psi | 53% | 2818 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,445 psi | 50% | 2802 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 43,947 psi | 68% | 3028 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,083 psi | 80% | 3110 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,541 psi | 69% | 3054 fps | 95.2% |
| Bofors RP5 | <<locked>> | 90% | 44,556 psi | 69% | 3045 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,136 psi | 69% | 2972 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,353 psi | 68% | 3012 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 52,330 psi | 81% | 3127 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,845 psi | 67% | 3002 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,615 psi | 72% | 3031 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 51,590 psi | 79% | 3117 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,488 psi | 78% | 3100 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,695 psi | 58% | 2844 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,060 psi | 63% | 3038 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 43,656 psi | 67% | 3015 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 42% | 1909 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,968 psi | 82% | 3117 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,770 psi | 63% | 2887 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,659 psi | 72% | 3005 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 39,914 psi | 61% | 2897 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,371 psi | 76% | 3051 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 49,269 psi | 76% | 3146 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,301 psi | 82% | 3110 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,063 psi | 68% | 2949 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 42,308 psi | 65% | 2927 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 34,519 psi | 53% | 2746 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 54,041 psi | 83% | 3159 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,772 psi | 67% | 2982 fps | 95.2% |
| Norma MRP | 85.9 gr | 86% | 40,698 psi | 63% | 2989 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 41,321 psi | 64% | 2946 fps | 98.6% |
| Ramshot Grand | <<locked>> | 92% | 45,992 psi | 71% | 3084 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,350 psi | 62% | 2927 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 41,147 psi | 63% | 2946 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,214 psi | 80% | 3104 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,806 psi | 77% | 3163 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,018 psi | 65% | 2969 fps | 98.6% |
| ReloadSwiss RS 70 | 81.5 gr | 80% | 40,538 psi | 62% | 2979 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,159 psi | 59% | 2946 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 54,897 psi | 84% | 3120 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,834 psi | 75% | 3051 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,008 psi | 74% | 3038 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 42,467 psi | 65% | 2969 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 45,136 psi | 69% | 2972 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,063 psi | 68% | 2949 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 53,301 psi | 82% | 3110 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,308 psi | 65% | 2927 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,502 psi | 78% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,501 psi | 76% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,207 psi | 66% | 2887 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,134 psi | 65% | 2963 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 48,907 psi | 75% | 3051 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,676 psi | 76% | 3022 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,985 psi | 58% | 2894 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 40,103 psi | 62% | 2884 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 46,818 psi | 72% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,743 psi | 66% | 2946 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 42,786 psi | 66% | 2923 fps | 96% |
| Vihtavuori N540 | <<locked>> | 80% | 54,215 psi | 83% | 3081 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,322 psi | 65% | 2943 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,982 psi | 51% | 2762 fps | 96.7% |
| Vihtavuori N560 | 91.9 gr | 92% | 51,097 psi | 79% | 3182 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 47,427 psi | 73% | 3084 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,395 psi | 65% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,005 psi | 68% | 3005 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,194 psi | 40% | 2638 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,728 psi | 66% | 2930 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 89 powders for .300 Rem. Ultra Mag. loaded with the .308 | 132gr | Brenneke TIG nature. Winchester StaBALL HD delivers the highest muzzle velocity at 3,360 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,360 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 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 132.0 gr projectile in 0.308" calls for a 1:11.5 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 132gr | Brenneke TIG nature they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.