Load Specifications
Load data in caliber .300 RCM with .310 | 125gr | Speer HP TNT bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2015 | <<locked>> | 90% | 55,912 psi | 88% | 3176 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,695 psi | 87% | 3268 fps | 98% |
| Accurate 2230 | <<locked>> | 82% | 57,217 psi | 90% | 3281 fps | 98.5% |
| Accurate 2460 | <<locked>> | 86% | 54,578 psi | 86% | 3192 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 56,985 psi | 89% | 3235 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,115 psi | 88% | 3255 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 56,362 psi | 88% | 3268 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 55,535 psi | 87% | 3117 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,912 psi | 88% | 3140 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,795 psi | 86% | 3251 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 82% | 57,058 psi | 89% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 55,767 psi | 87% | 3241 fps | 98.2% |
| ADI AR 2219 | <<locked>> | 84% | 56,434 psi | 88% | 3248 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 57,638 psi | 90% | 3264 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 92% | 57,334 psi | 90% | 3255 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,506 psi | 87% | 3327 fps | 99.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,433 psi | 85% | 3356 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,245 psi | 87% | 3268 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,593 psi | 87% | 3186 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 56,057 psi | 88% | 3287 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 3317 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,911 psi | 86% | 3104 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,795 psi | 86% | 3258 fps | 97.7% |
| Bofors RP3 | <<locked>> | 98% | 55,796 psi | 87% | 3284 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 90% | 56,463 psi | 88% | 3202 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 92% | 56,913 psi | 89% | 3297 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,911 psi | 86% | 3337 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 86% | 54,708 psi | 86% | 3222 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,246 psi | 88% | 3248 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 57,261 psi | 90% | 3291 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 82% | 57,493 psi | 90% | 3173 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 55,288 psi | 87% | 3264 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,394 psi | 65% | 3009 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,114 psi | 85% | 3291 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,490 psi | 54% | 2001 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,898 psi | 89% | 3271 fps | 99.2% |
| IMR 3031 | <<locked>> | 92% | 54,491 psi | 85% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,347 psi | 87% | 3225 fps | 98.3% |
| IMR 4198 | <<locked>> | 86% | 55,767 psi | 87% | 3146 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 57,421 psi | 90% | 3327 fps | 99% |
| IMR 8208 XBR | <<locked>> | 92% | 57,638 psi | 90% | 3264 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 86% | 54,389 psi | 85% | 3196 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 94% | 57,638 psi | 90% | 3287 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,056 psi | 86% | 3179 fps | 98.6% |
| Lovex S062 | <<locked>> | 96% | 54,665 psi | 86% | 3225 fps | 99.4% |
| Norma 200 | <<locked>> | 82% | 55,492 psi | 87% | 3156 fps | 100% |
| Norma 201 | <<locked>> | 94% | 57,029 psi | 89% | 3255 fps | 99.6% |
| Norma 202 | <<locked>> | 94% | 57,377 psi | 90% | 3264 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,114 psi | 86% | 3274 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 96% | 55,796 psi | 87% | 3301 fps | 98.7% |
| Ramshot TAC | <<locked>> | 90% | 55,143 psi | 86% | 3212 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,998 psi | 85% | 3235 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,796 psi | 87% | 3209 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,722 psi | 54% | 2047 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 57,580 psi | 90% | 3258 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,985 psi | 88% | 3363 fps | 98.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3399 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 54,694 psi | 86% | 3196 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 57,421 psi | 90% | 3248 fps | 99.6% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3264 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 57,638 psi | 90% | 3287 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,665 psi | 86% | 3225 fps | 99.4% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 57,740 psi | 90% | 3222 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,695 psi | 87% | 2858 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 56,782 psi | 89% | 3255 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3333 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 56,492 psi | 89% | 3209 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 56,681 psi | 89% | 3245 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 57,000 psi | 89% | 3278 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,724 psi | 87% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,564 psi | 87% | 3140 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 55,753 psi | 87% | 3251 fps | 99.6% |
| Somchem S335 | <<locked>> | 92% | 54,911 psi | 86% | 3150 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 56,043 psi | 88% | 3238 fps | 98.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3268 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,263 psi | 63% | 3058 fps | 97.5% |
| Vihtavuori N120 | <<locked>> | 82% | 56,884 psi | 89% | 3087 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 55,448 psi | 87% | 3127 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,564 psi | 87% | 3140 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,463 psi | 88% | 3222 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,563 psi | 86% | 3186 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3196 fps | 99.6% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3130 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 90% | 54,853 psi | 86% | 3209 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 96% | 56,246 psi | 88% | 3228 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,269 psi | 77% | 3120 fps | 98.2% |
| Winchester 748 | <<locked>> | 90% | 53,809 psi | 84% | 3255 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 94% | 56,782 psi | 89% | 3284 fps | 99.2% |
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 2015 | <<locked>> | 80% | 40,669 psi | 64% | 2907 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,127 psi | 82% | 3199 fps | 97.3% |
| Accurate 2230 | <<locked>> | 80% | 53,171 psi | 83% | 3212 fps | 97.9% |
| Accurate 2460 | <<locked>> | 80% | 44,324 psi | 69% | 3009 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 33,359 psi | 52% | 2789 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 39,494 psi | 62% | 2943 fps | 98.3% |
| Accurate 4064 | <<locked>> | 80% | 31,546 psi | 49% | 2759 fps | 97% |
| Accurate LT-30 | <<locked>> | 80% | 49,255 psi | 77% | 3015 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,617 psi | 78% | 3035 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 39,885 psi | 63% | 2946 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 53,664 psi | 84% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 43,729 psi | 69% | 3009 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 49,066 psi | 77% | 3127 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,508 psi | 62% | 2913 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 80% | 38,189 psi | 60% | 2933 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,571 psi | 71% | 3136 fps | 97.5% |
| Alliant Power Pro 2000-MR | 60 gr | 88% | 44,469 psi | 70% | 3146 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 37,550 psi | 59% | 2910 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,195 psi | 72% | 3031 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 43,381 psi | 68% | 3048 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 39,943 psi | 63% | 3041 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,356 psi | 76% | 2999 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 44,701 psi | 70% | 3068 fps | 95.4% |
| Bofors RP3 | <<locked>> | 86% | 37,014 psi | 58% | 2910 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,568 psi | 65% | 2917 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,550 psi | 59% | 2917 fps | 96.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,263 psi | 65% | 3058 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 44,904 psi | 70% | 3048 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 45,861 psi | 72% | 3068 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 46,862 psi | 73% | 3100 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 54,128 psi | 85% | 3120 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 37,782 psi | 59% | 2904 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 38,725 psi | 61% | 2946 fps | 95.2% |
| Hodgdon LEVERevolution | 54.8 gr | 82% | 36,114 psi | 57% | 2907 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,411 psi | 40% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 38,827 psi | 61% | 2910 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 36,376 psi | 57% | 2917 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 42,975 psi | 67% | 2989 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 46,775 psi | 73% | 3002 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 38,899 psi | 61% | 2956 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 39,508 psi | 62% | 2913 fps | 96.6% |
| Lovex D073.5 | <<locked>> | 80% | 44,179 psi | 69% | 3012 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 80% | 35,679 psi | 56% | 2861 fps | 97.3% |
| Lovex S060 | <<locked>> | 82% | 40,640 psi | 64% | 2894 fps | 95.6% |
| Lovex S062 | <<locked>> | 82% | 35,244 psi | 55% | 2822 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 52,228 psi | 82% | 3107 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,840 psi | 58% | 2848 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 36,666 psi | 57% | 2864 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 39,943 psi | 63% | 2969 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 88% | 42,525 psi | 67% | 3045 fps | 95.9% |
| Ramshot TAC | <<locked>> | 88% | 51,576 psi | 81% | 3150 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,089 psi | 64% | 2979 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,844 psi | 67% | 2963 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,715 psi | 40% | 1834 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,396 psi | 70% | 3022 fps | 98.9% |
| ReloadSwiss RS 52 | 56.8 gr | 86% | 42,264 psi | 66% | 3094 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 32,648 psi | 51% | 2851 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 40,379 psi | 63% | 2917 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 34,853 psi | 55% | 2789 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 88% | 37,101 psi | 58% | 2900 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,679 psi | 56% | 2861 fps | 97.3% |
| Shooters World Precision | <<locked>> | 82% | 35,244 psi | 55% | 2822 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,949 psi | 74% | 3035 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,011 psi | 83% | 2822 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,719 psi | 78% | 3136 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,133 psi | 64% | 3018 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,847 psi | 73% | 3048 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,414 psi | 77% | 3117 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,191 psi | 65% | 2972 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,421 psi | 60% | 2825 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,459 psi | 49% | 2664 fps | 97.7% |
| Somchem S321 | <<locked>> | 80% | 42,467 psi | 67% | 2999 fps | 97.7% |
| Somchem S335 | <<locked>> | 80% | 37,971 psi | 60% | 2828 fps | 99% |
| Somchem S341 | <<locked>> | 82% | 39,668 psi | 62% | 2923 fps | 95.1% |
| Somchem S355 | <<locked>> | 88% | 38,247 psi | 60% | 2913 fps | 95.3% |
| Somchem S365 | <<locked>> | 96% | 35,505 psi | 56% | 2933 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 53,534 psi | 84% | 3038 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,555 psi | 68% | 2927 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,464 psi | 60% | 2835 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 33,692 psi | 53% | 2795 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 34,664 psi | 54% | 2792 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 34,069 psi | 53% | 2785 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 98% | 44,773 psi | 70% | 3068 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 39,276 psi | 62% | 2904 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 33,446 psi | 52% | 2769 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 40,292 psi | 63% | 2933 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 38,305 psi | 60% | 2946 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 37,695 psi | 59% | 2910 fps | 95.3% |
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 88 powders for .300 RCM loaded with the .310 | 125gr | Speer HP TNT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,399 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. Alliant Reloder-17, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .300 RCM with the .310 | 125gr | Speer HP TNT 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.