Load Specifications
Load data in caliber .300 CR with .308 | 170gr | TWENTY-NINE ERTP bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon H335 and Somchem S321.
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 1680 | <<locked>> | 86% | 55,448 psi | 89% | 2418 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2500 fps | 100% |
| Accurate 2200 | <<locked>> | 90% | 55,216 psi | 89% | 2539 fps | 96.9% |
| Accurate 2230 | <<locked>> | 90% | 55,782 psi | 89% | 2552 fps | 97.4% |
| Accurate 2460 | <<locked>> | 96% | 55,201 psi | 89% | 2523 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 44,208 psi | 71% | 2415 fps | 100% |
| Accurate 2520ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 2572 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 41,089 psi | 66% | 2392 fps | 99.1% |
| Accurate LT-30 | <<locked>> | 92% | 56,101 psi | 90% | 2431 fps | 100% |
| Accurate LT-32 | <<locked>> | 90% | 53,432 psi | 86% | 2405 fps | 99.5% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2516 fps | 97.2% |
| ADI AR 2207 | <<locked>> | 90% | 56,115 psi | 90% | 2454 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 54,781 psi | 88% | 2536 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 55,085 psi | 88% | 2530 fps | 98.7% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 52,431 psi | 84% | 2530 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 55,782 psi | 89% | 2621 fps | 98.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 41,524 psi | 67% | 2382 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 94% | 53,461 psi | 86% | 2480 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 54,491 psi | 87% | 2431 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 54,650 psi | 88% | 2434 fps | 100% |
| Baschieri & Pellagri 107ᴾ | <<locked>> | 100% | 51,996 psi | 83% | 2526 fps | 95.9% |
| Bofors RP3ᴾ | <<locked>> | 100% | 40,698 psi | 65% | 2385 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 98% | 54,969 psi | 88% | 2484 fps | 99.1% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2559 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 98% | 55,434 psi | 89% | 2635 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 96% | 56,231 psi | 90% | 2552 fps | 100% |
| Hodgdon H335 | <<locked>> | 94% | 54,012 psi | 87% | 2536 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 88% | 55,114 psi | 88% | 2434 fps | 100% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2526 fps | 97.8% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 47,166 psi | 76% | 2497 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,822 psi | 53% | 1453 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 50,995 psi | 82% | 2487 fps | 97.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 49,850 psi | 80% | 2530 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 54,868 psi | 88% | 2451 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 54,781 psi | 88% | 2379 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 46,601 psi | 75% | 2474 fps | 96.4% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 55,085 psi | 88% | 2530 fps | 98.7% |
| Lovex D073.4 | <<locked>> | 90% | 56,260 psi | 90% | 2543 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 96% | 55,230 psi | 89% | 2530 fps | 99.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2500 fps | 99.3% |
| Lovex S053 | <<locked>> | 84% | 53,809 psi | 86% | 2333 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2461 fps | 97.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 44,788 psi | 72% | 2402 fps | 97.3% |
| Norma 200 | <<locked>> | 90% | 53,867 psi | 86% | 2464 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2470 fps | 98.2% |
| Norma 202ᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2487 fps | 99.7% |
| Norma 203Bᴾ | <<locked>> | 100% | 44,672 psi | 72% | 2434 fps | 95.8% |
| Ramshot Wild Boarᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2559 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 96% | 54,505 psi | 87% | 2497 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,025 psi | 53% | 1493 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 54,882 psi | 88% | 2415 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 55,521 psi | 89% | 2533 fps | 99.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 40,132 psi | 64% | 2405 fps | 96.8% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2516 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 47,718 psi | 77% | 2421 fps | 97.7% |
| Shooters World AR Plus | <<locked>> | 90% | 56,260 psi | 90% | 2543 fps | 99.7% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2500 fps | 99.3% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 44,788 psi | 72% | 2402 fps | 97.3% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 53,214 psi | 85% | 2464 fps | 98.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 54,215 psi | 87% | 2195 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 55,100 psi | 88% | 2543 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 54,708 psi | 88% | 2493 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 50,154 psi | 80% | 2487 fps | 96.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 2444 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 43,468 psi | 70% | 2313 fps | 99.5% |
| Somchem S321 | <<locked>> | 96% | 53,258 psi | 85% | 2530 fps | 98.8% |
| Somchem S335ᴾ | <<locked>> | 100% | 52,257 psi | 84% | 2441 fps | 100% |
| Somchem S341ᴾ | <<locked>> | 100% | 53,084 psi | 85% | 2510 fps | 97.1% |
| Vihtavuori N120 | <<locked>> | 90% | 56,057 psi | 90% | 2408 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 54,099 psi | 87% | 2434 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 53,316 psi | 85% | 2438 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 45,281 psi | 73% | 2415 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2428 fps | 99.6% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 38,130 psi | 61% | 2283 fps | 96% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2533 fps | 98.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 46,035 psi | 74% | 2421 fps | 99.2% |
| Winchester 748ᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2575 fps | 99.3% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 49,719 psi | 80% | 2500 fps | 97.4% |
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 1680 | <<locked>> | 80% | 45,730 psi | 73% | 2293 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 30,327 psi | 49% | 2096 fps | 98.4% |
| Accurate 2200 | <<locked>> | 86% | 48,544 psi | 78% | 2441 fps | 95.5% |
| Accurate 2230 | <<locked>> | 84% | 45,179 psi | 72% | 2398 fps | 95.2% |
| Accurate 2460 | <<locked>> | 80% | 32,387 psi | 52% | 2159 fps | 96.2% |
| Accurate 2495 | <<locked>> | 80% | 23,003 psi | 37% | 1988 fps | 96.1% |
| Accurate 2520 | <<locked>> | 84% | 32,198 psi | 52% | 2195 fps | 95.7% |
| Accurate 4064 | <<locked>> | 88% | 28,195 psi | 45% | 2133 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 39,117 psi | 63% | 2188 fps | 99% |
| Accurate LT-32 | <<locked>> | 80% | 39,508 psi | 63% | 2195 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 94% | 43,163 psi | 69% | 2382 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 41,713 psi | 67% | 2267 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 36,709 psi | 59% | 2260 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 38,232 psi | 61% | 2267 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 27,731 psi | 44% | 2110 fps | 99.5% |
| Alliant Power Pro 1200-R | 31.9 gr | 86% | 40,422 psi | 65% | 2382 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 39,131 psi | 63% | 2339 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,896 psi | 56% | 2198 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 42,685 psi | 68% | 2274 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,405 psi | 60% | 2182 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 48,689 psi | 78% | 2477 fps | 95.1% |
| Bofors RP3 | <<locked>> | 98% | 38,218 psi | 61% | 2339 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 36,289 psi | 58% | 2188 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 88% | 35,143 psi | 56% | 2270 fps | 95.2% |
| Hodgdon CFE223 | <<locked>> | 94% | 48,501 psi | 78% | 2533 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 33,678 psi | 54% | 2198 fps | 97.8% |
| Hodgdon H335 | 31.7 gr | 80% | 33,678 psi | 54% | 2205 fps | 96.8% |
| Hodgdon H4198 | <<locked>> | 80% | 43,120 psi | 69% | 2267 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 92% | 40,872 psi | 66% | 2349 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 39,073 psi | 63% | 2352 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,250 psi | 39% | 1296 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 42,409 psi | 68% | 2352 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 26,629 psi | 43% | 2087 fps | 96.1% |
| IMR 4198 | <<locked>> | 80% | 36,506 psi | 59% | 2182 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 48,863 psi | 78% | 2306 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 43,903 psi | 70% | 2431 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 88% | 38,232 psi | 61% | 2267 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 80% | 39,537 psi | 63% | 2300 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 82% | 34,476 psi | 55% | 2205 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 86% | 30,705 psi | 49% | 2175 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 47,732 psi | 77% | 2260 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 42,380 psi | 68% | 2290 fps | 95% |
| Lovex S062 | <<locked>> | 94% | 37,492 psi | 60% | 2277 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 39,711 psi | 64% | 2264 fps | 100% |
| Norma 201 | <<locked>> | 90% | 37,289 psi | 60% | 2254 fps | 95.2% |
| Norma 202 | <<locked>> | 82% | 28,892 psi | 46% | 2100 fps | 95.1% |
| Norma 203B | <<locked>> | 98% | 42,047 psi | 67% | 2388 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 94% | 44,759 psi | 72% | 2415 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 44,889 psi | 72% | 2359 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,236 psi | 39% | 1329 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 48,704 psi | 78% | 2339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 33,460 psi | 54% | 2175 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 37,884 psi | 61% | 2359 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 30,545 psi | 49% | 2096 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 92% | 37,391 psi | 60% | 2247 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 39,537 psi | 63% | 2300 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 30,705 psi | 49% | 2175 fps | 95% |
| Shooters World Precision | <<locked>> | 94% | 37,492 psi | 60% | 2277 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 40,480 psi | 65% | 2270 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 44,193 psi | 71% | 2077 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,941 psi | 59% | 2260 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,578 psi | 57% | 2201 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 44,309 psi | 71% | 2398 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,486 psi | 47% | 2031 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 26,905 psi | 43% | 1991 fps | 95.3% |
| Somchem S321 | 33.6 gr | 84% | 35,650 psi | 57% | 2244 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 28,819 psi | 46% | 2037 fps | 96% |
| Somchem S341 | <<locked>> | 94% | 43,468 psi | 70% | 2369 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 41,829 psi | 67% | 2231 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 33,562 psi | 54% | 2123 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 29,196 psi | 47% | 2044 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 24,381 psi | 39% | 2001 fps | 96.4% |
| Vihtavuori N140 | <<locked>> | 84% | 29,254 psi | 47% | 2090 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 98% | 35,911 psi | 58% | 2244 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 88% | 37,927 psi | 61% | 2260 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 86% | 29,617 psi | 47% | 2113 fps | 95.1% |
| Winchester 748 | <<locked>> | 86% | 34,084 psi | 55% | 2241 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 94% | 40,683 psi | 65% | 2352 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 78 powders for .300 CR loaded with the .308 | 170gr | TWENTY-NINE ERTP. Hodgdon CFE223 delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,453 fps to 2,635 fps. Accurate 2015 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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 1200-R, Hodgdon H335, Somchem S321 rank at the top here: for .300 CR with the .308 | 170gr | TWENTY-NINE ERTP 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.