Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 120gr | GM Geschoss-Manufaktur Splinter TIP bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 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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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 2495 | <<locked>> | 82% | 57,276 psi | 88% | 3215 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,419 psi | 85% | 3225 fps | 98.1% |
| Accurate 3100 | <<locked>> | 98% | 55,448 psi | 85% | 3258 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 58,044 psi | 89% | 3274 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,521 psi | 87% | 3323 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 58,421 psi | 90% | 3317 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 58,291 psi | 90% | 3369 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,057 psi | 86% | 3356 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,564 psi | 86% | 3281 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,593 psi | 86% | 3304 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,377 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,085 psi | 85% | 3353 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,624 psi | 89% | 3353 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,506 psi | 85% | 3350 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,217 psi | 87% | 3337 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,660 psi | 75% | 3251 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,450 psi | 88% | 3425 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,418 psi | 84% | 3327 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 56,608 psi | 87% | 3294 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,506 psi | 85% | 3350 fps | 97.9% |
| Bofors RP7 | <<locked>> | 88% | 55,956 psi | 86% | 3271 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 84% | 57,043 psi | 88% | 3310 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 54,998 psi | 85% | 3317 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 88% | 57,986 psi | 89% | 3337 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,856 psi | 89% | 3304 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,508 psi | 90% | 3353 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,688 psi | 73% | 3287 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 88% | 56,173 psi | 86% | 3346 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 56% | 2208 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,639 psi | 90% | 3323 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,551 psi | 89% | 3297 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,536 psi | 87% | 3271 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 57,841 psi | 89% | 3307 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,827 psi | 89% | 3307 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 57,217 psi | 88% | 3314 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,101 psi | 88% | 3337 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,305 psi | 88% | 3287 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,667 psi | 89% | 3392 fps | 97.1% |
| Lovex S060 | <<locked>> | 82% | 58,711 psi | 90% | 3284 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,798 psi | 89% | 3287 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,943 psi | 89% | 3297 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 56,086 psi | 86% | 3284 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,907 psi | 75% | 3146 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 58,755 psi | 90% | 3304 fps | 100% |
| Norma 203B | <<locked>> | 82% | 54,911 psi | 85% | 3287 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,129 psi | 85% | 3294 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 55,434 psi | 85% | 3373 fps | 98.9% |
| Norma URP | <<locked>> | 90% | 55,187 psi | 85% | 3307 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 56,449 psi | 87% | 3307 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,711 psi | 90% | 3412 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 58,247 psi | 90% | 3360 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,910 psi | 81% | 3264 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 57% | 2257 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,014 psi | 88% | 3291 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,624 psi | 90% | 3409 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,145 psi | 88% | 3343 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,738 psi | 86% | 3376 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,704 psi | 75% | 3284 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 55,825 psi | 86% | 3248 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,826 psi | 87% | 3291 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,738 psi | 86% | 3274 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 96% | 56,840 psi | 87% | 3337 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 55,956 psi | 86% | 3271 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,943 psi | 89% | 3297 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,798 psi | 89% | 3287 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,086 psi | 86% | 3284 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,100 psi | 85% | 3294 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,348 psi | 88% | 3173 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,870 psi | 89% | 3245 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,362 psi | 87% | 3330 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 56,637 psi | 87% | 3287 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 58,204 psi | 90% | 3255 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 55,230 psi | 85% | 3310 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,537 psi | 89% | 3307 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 56,188 psi | 86% | 3209 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,855 psi | 88% | 3222 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,378 psi | 90% | 3258 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,261 psi | 88% | 3304 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,203 psi | 88% | 3274 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 55,172 psi | 85% | 3205 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,579 psi | 87% | 3304 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 58,494 psi | 90% | 3366 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,448 psi | 85% | 3363 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,769 psi | 89% | 3255 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,187 psi | 85% | 3320 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,432 psi | 82% | 3406 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 58,320 psi | 90% | 3304 fps | 98.2% |
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 2495 | <<locked>> | 80% | 53,432 psi | 82% | 3163 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,706 psi | 80% | 3159 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 38,450 psi | 59% | 2930 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,647 psi | 78% | 3166 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,088 psi | 60% | 2992 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,037 psi | 74% | 3143 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 90% | 47,224 psi | 73% | 3173 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 52,257 psi | 80% | 3284 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,704 psi | 75% | 3166 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,025 psi | 80% | 3245 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,884 psi | 58% | 3009 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,874 psi | 68% | 3153 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 46,833 psi | 72% | 3159 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,715 psi | 69% | 3143 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,646 psi | 46% | 2772 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,840 psi | 57% | 2979 fps | 95.9% |
| Alliant Reloder-26 | 86.8 gr | 84% | 35,259 psi | 54% | 2972 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 47,311 psi | 73% | 3196 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,124 psi | 76% | 3173 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,715 psi | 69% | 3143 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,917 psi | 66% | 3022 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 49,632 psi | 76% | 3186 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 41,321 psi | 64% | 3048 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 47,311 psi | 73% | 3146 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,360 psi | 54% | 2887 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,491 psi | 84% | 3291 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 44,309 psi | 68% | 3205 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,857 psi | 63% | 3051 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 41% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,868 psi | 84% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,502 psi | 78% | 3182 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,939 psi | 81% | 3212 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 44,222 psi | 68% | 3058 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,483 psi | 68% | 3061 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 37,507 psi | 58% | 2940 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 53,388 psi | 82% | 3278 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,635 psi | 83% | 3225 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 49,792 psi | 77% | 3248 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 55,027 psi | 85% | 3232 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,560 psi | 78% | 3176 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,727 psi | 64% | 2999 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 40,074 psi | 62% | 2972 fps | 95.2% |
| Lovex S071 | <<locked>> | 92% | 36,985 psi | 57% | 2897 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,984 psi | 85% | 3248 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,358 psi | 79% | 3225 fps | 100% |
| Norma 204 | <<locked>> | 86% | 47,834 psi | 74% | 3159 fps | 95.5% |
| Norma MRP | 88.3 gr | 88% | 40,915 psi | 63% | 3091 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,885 psi | 60% | 2992 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 52,431 psi | 81% | 3241 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 50,154 psi | 77% | 3261 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,956 psi | 58% | 2966 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 96% | 44,976 psi | 69% | 3114 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 42% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,647 psi | 76% | 3163 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,688 psi | 72% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,305 psi | 60% | 3005 fps | 97.2% |
| ReloadSwiss RS 70 | 81.9 gr | 80% | 38,101 psi | 59% | 3015 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,568 psi | 64% | 3120 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 52,402 psi | 81% | 3196 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,195 psi | 71% | 3114 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 52,069 psi | 80% | 3212 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 45,977 psi | 71% | 3136 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,917 psi | 66% | 3022 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,727 psi | 64% | 2999 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 50,560 psi | 78% | 3176 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,074 psi | 62% | 2972 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,790 psi | 74% | 3169 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,065 psi | 72% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,046 psi | 63% | 2933 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,571 psi | 70% | 3133 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 46,253 psi | 71% | 3114 fps | 99.8% |
| Somchem S361 | <<locked>> | 92% | 54,157 psi | 83% | 3189 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 35,346 psi | 54% | 2936 fps | 99.1% |
| Somchem S385 | <<locked>> | 88% | 43,439 psi | 67% | 3048 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,605 psi | 81% | 3156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,229 psi | 82% | 3169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,411 psi | 68% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,292 psi | 62% | 2992 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 92% | 43,091 psi | 66% | 3022 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 51,663 psi | 80% | 3156 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,914 psi | 61% | 2992 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 33,025 psi | 51% | 2861 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 94% | 51,459 psi | 79% | 3291 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,987 psi | 62% | 2956 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,466 psi | 64% | 3051 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,340 psi | 44% | 2802 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,688 psi | 72% | 3104 fps | 95.5% |
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 87 powders for .300 Rem. Ultra Mag. loaded with the .308 | 120gr | GM Geschoss-Manufaktur Splinter TIP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,425 fps; across all powders the maximum-charge window runs from 2,208 fps to 3,425 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 87 of the 87 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 120.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 120gr | GM Geschoss-Manufaktur Splinter TIP 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.