Load Specifications
Bullet Manufacturer:Berry's
Bullet Weight:220 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 RCM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.0
Load data in caliber .300 RCM with .300 | 220gr | Berry's Spire Point bullet and 109 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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 2495 | <<locked>> | 84% | 56,144 psi | 88% | 2402 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,508 psi | 90% | 2474 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 2467 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 56,246 psi | 88% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,782 psi | 89% | 2556 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2585 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 55,564 psi | 87% | 2477 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,652 psi | 89% | 2484 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,114 psi | 85% | 2549 fps | 98.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2539 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,869 psi | 88% | 2598 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2585 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,406 psi | 90% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,522 psi | 90% | 2523 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,435 psi | 90% | 2602 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,969 psi | 86% | 2579 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 2585 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 2539 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,413 psi | 74% | 2480 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,539 psi | 65% | 2421 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 2651 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,230 psi | 87% | 2497 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,035 psi | 72% | 2474 fps | 97.4% |
| Bofors RP3 | <<locked>> | 86% | 54,621 psi | 86% | 2477 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 2539 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 57,406 psi | 90% | 2510 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,682 psi | 90% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,940 psi | 86% | 2490 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,303 psi | 87% | 2556 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 55,361 psi | 87% | 2520 fps | 99% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 2543 fps | 97.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,215 psi | 85% | 2526 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 56,159 psi | 88% | 2484 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,998 psi | 85% | 2487 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,101 psi | 88% | 2520 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,640 psi | 64% | 2444 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 92% | 55,201 psi | 87% | 2592 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 57% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,174 psi | 90% | 2487 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,898 psi | 89% | 2457 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,260 psi | 88% | 2467 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,303 psi | 87% | 2454 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 54,795 psi | 86% | 2497 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,680 psi | 87% | 2487 fps | 99.6% |
| IMR 4831 | <<locked>> | 96% | 57,116 psi | 90% | 2546 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,680 psi | 87% | 2503 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,290 psi | 90% | 2533 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,081 psi | 77% | 2513 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 82% | 55,999 psi | 88% | 2454 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,520 psi | 85% | 2408 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,376 psi | 88% | 2461 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,767 psi | 87% | 2487 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 56,855 psi | 89% | 2523 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,032 psi | 66% | 2336 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 57,740 psi | 90% | 2467 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,940 psi | 86% | 2421 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,797 psi | 89% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,477 psi | 87% | 2546 fps | 98.7% |
| Norma MRPᴾ | <<locked>> | 100% | 53,127 psi | 83% | 2612 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 55,434 psi | 87% | 2543 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,653 psi | 90% | 2539 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,197 psi | 77% | 2526 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 54,157 psi | 85% | 2546 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,671 psi | 68% | 2418 fps | 97.5% |
| Ramshot TAC | <<locked>> | 82% | 57,696 psi | 90% | 2503 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 1539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,897 psi | 86% | 2480 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,129 psi | 86% | 2539 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,650 psi | 86% | 2569 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,434 psi | 88% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,172 psi | 86% | 2608 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,205 psi | 63% | 2434 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 84% | 54,940 psi | 86% | 2428 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,491 psi | 85% | 2470 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,869 psi | 88% | 2520 fps | 98% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 2572 fps | 99% |
| Rottweil R 907 | <<locked>> | 92% | 57,406 psi | 90% | 2510 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,767 psi | 87% | 2487 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,999 psi | 88% | 2454 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,376 psi | 88% | 2461 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,855 psi | 89% | 2523 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,217 psi | 88% | 2526 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,768 psi | 89% | 2487 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,595 psi | 90% | 2500 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,245 psi | 87% | 2359 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,898 psi | 88% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,317 psi | 87% | 2444 fps | 99.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2569 fps | 99% |
| Somchem S335 | <<locked>> | 82% | 55,042 psi | 86% | 2362 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,260 psi | 88% | 2470 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,723 psi | 86% | 2467 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,609 psi | 90% | 2516 fps | 97.4% |
| Somchem S365 | <<locked>> | 96% | 54,172 psi | 85% | 2539 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 2552 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,767 psi | 87% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,216 psi | 87% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,419 psi | 87% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,956 psi | 88% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,070 psi | 85% | 2487 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,936 psi | 77% | 2434 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 86% | 57,014 psi | 89% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,739 psi | 89% | 2543 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 2546 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2605 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,159 psi | 90% | 2503 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,608 psi | 87% | 2559 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2536 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,566 psi | 90% | 2507 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2497 fps | 98.4% |
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 2495 | <<locked>> | 80% | 49,356 psi | 77% | 2320 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,500 psi | 74% | 2333 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 29,573 psi | 46% | 2090 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,746 psi | 73% | 2329 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,259 psi | 55% | 2218 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 98% | 48,689 psi | 76% | 2536 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 52,127 psi | 82% | 2431 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,469 psi | 70% | 2310 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 39,276 psi | 62% | 2300 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 45,440 psi | 71% | 2438 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,588 psi | 76% | 2497 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,233 psi | 61% | 2300 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,788 psi | 70% | 2333 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,659 psi | 75% | 2388 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,737 psi | 54% | 2228 fps | 98.7% |
| Alliant Reloder-17 | 48.8 gr | 80% | 39,044 psi | 61% | 2336 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 38,899 psi | 61% | 2297 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,725 psi | 61% | 2339 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,367 psi | 40% | 2024 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,545 psi | 48% | 2172 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 82% | 28,703 psi | 45% | 2169 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,866 psi | 81% | 2451 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 38,218 psi | 60% | 2326 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,730 psi | 70% | 2339 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,725 psi | 61% | 2339 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,784 psi | 62% | 2234 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,070 psi | 85% | 2457 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,426 psi | 71% | 2352 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 37,405 psi | 59% | 2264 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 40,277 psi | 63% | 2277 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 96% | 48,501 psi | 76% | 2441 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 47,688 psi | 75% | 2431 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 52,678 psi | 83% | 2441 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,256 psi | 51% | 2139 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,226 psi | 77% | 2431 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,087 psi | 60% | 2385 fps | 95.5% |
| Hodgdon Superformance | 51.6 gr | 80% | 36,216 psi | 57% | 2270 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 43% | 1339 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,517 psi | 79% | 2398 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,490 psi | 84% | 2418 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,789 psi | 73% | 2339 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,965 psi | 77% | 2362 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 35,491 psi | 56% | 2172 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,147 psi | 64% | 2260 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 34,055 psi | 53% | 2182 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 48,878 psi | 77% | 2411 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,514 psi | 74% | 2392 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 43,207 psi | 68% | 2411 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 52,446 psi | 82% | 2411 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,459 psi | 81% | 2369 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,963 psi | 74% | 2336 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,624 psi | 61% | 2218 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 36,840 psi | 58% | 2201 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 30,618 psi | 48% | 2116 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 51,039 psi | 80% | 2382 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,721 psi | 81% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,021 psi | 74% | 2375 fps | 100% |
| Norma 204 | <<locked>> | 84% | 39,740 psi | 62% | 2293 fps | 95.4% |
| Norma MRP | <<locked>> | 88% | 35,462 psi | 56% | 2300 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,244 psi | 55% | 2215 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,253 psi | 74% | 2398 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 42,873 psi | 67% | 2418 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 34,272 psi | 54% | 2208 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 96% | 37,855 psi | 59% | 2310 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 54,201 psi | 85% | 2457 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1371 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,324 psi | 71% | 2336 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,517 psi | 81% | 2493 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,539 psi | 65% | 2382 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,041 psi | 55% | 2241 fps | 98.3% |
| ReloadSwiss RS 70 | 49.6 gr | 80% | 34,258 psi | 54% | 2244 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,099 psi | 55% | 2316 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 48,791 psi | 76% | 2346 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,192 psi | 66% | 2293 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 43,424 psi | 68% | 2329 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 37,811 psi | 59% | 2280 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,784 psi | 62% | 2234 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,624 psi | 61% | 2218 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,446 psi | 82% | 2411 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,963 psi | 74% | 2336 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,840 psi | 58% | 2201 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,352 psi | 68% | 2346 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,939 psi | 83% | 2438 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,734 psi | 80% | 2411 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,011 psi | 82% | 2320 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,874 psi | 69% | 2211 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,739 psi | 59% | 2169 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 37,449 psi | 59% | 2277 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,663 psi | 81% | 2323 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,765 psi | 83% | 2428 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,641 psi | 67% | 2293 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 47,340 psi | 74% | 2372 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 31,850 psi | 50% | 2182 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 36,100 psi | 57% | 2221 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,504 psi | 82% | 2306 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,834 psi | 77% | 2310 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,950 psi | 77% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,654 psi | 64% | 2234 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,608 psi | 57% | 2215 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 92% | 37,695 psi | 59% | 2247 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 47,384 psi | 74% | 2323 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,230 psi | 57% | 2221 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,630 psi | 43% | 2087 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 44,092 psi | 69% | 2448 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,882 psi | 56% | 2192 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 37,405 psi | 59% | 2264 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 22,452 psi | 35% | 1998 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,604 psi | 79% | 2418 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,321 psi | 63% | 2297 fps | 95.7% |
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 109 powders for .300 RCM loaded with the .300 | 220gr | Berry's Spire Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,651 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,651 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 RCM with the .300 | 220gr | Berry's Spire Point 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.