Load Specifications
Load data in caliber .300 CR with .311 | 190gr | Winchester Silvertip bullet and 98 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 CFE223.
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 2015 | <<locked>> | 90% | 54,636 psi | 88% | 2418 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,766 psi | 88% | 2500 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 55,796 psi | 89% | 2513 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 53,113 psi | 85% | 2441 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,911 psi | 88% | 2470 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,230 psi | 87% | 2493 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 54,592 psi | 88% | 2510 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,091 psi | 69% | 2415 fps | 97% |
| Accurate LT-30 | <<locked>> | 84% | 54,868 psi | 88% | 2369 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,274 psi | 89% | 2392 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 53,359 psi | 86% | 2497 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 82% | 56,405 psi | 90% | 2382 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 54,230 psi | 87% | 2490 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 84% | 55,158 psi | 88% | 2477 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 56,144 psi | 90% | 2500 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,811 psi | 89% | 2480 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,491 psi | 87% | 2552 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 56,318 psi | 90% | 2641 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 53,301 psi | 85% | 2510 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,650 psi | 88% | 2421 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,215 psi | 87% | 2530 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,729 psi | 70% | 2421 fps | 97.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2562 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,635 psi | 86% | 2369 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,156 psi | 85% | 2513 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 53,606 psi | 86% | 2523 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,143 psi | 88% | 2448 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,853 psi | 88% | 2530 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,069 psi | 85% | 2566 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 53,577 psi | 86% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,766 psi | 88% | 2487 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,506 psi | 89% | 2536 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 92% | 53,780 psi | 86% | 2507 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,842 psi | 64% | 2323 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,666 psi | 89% | 2575 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 55% | 1467 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,448 psi | 89% | 2510 fps | 99.8% |
| IMR 3031 | <<locked>> | 94% | 56,362 psi | 90% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,027 psi | 87% | 2477 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,723 psi | 88% | 2457 fps | 96.3% |
| IMR 4198 | <<locked>> | 86% | 55,114 psi | 88% | 2385 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2474 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,452 psi | 66% | 2369 fps | 96.7% |
| IMR 4895 | <<locked>> | 96% | 55,550 psi | 89% | 2556 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 92% | 56,144 psi | 90% | 2500 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 53,069 psi | 85% | 2451 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,825 psi | 90% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,911 psi | 86% | 2434 fps | 99.5% |
| Lovex S062 | <<locked>> | 98% | 56,391 psi | 90% | 2516 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,878 psi | 78% | 2418 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 54,636 psi | 88% | 2398 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,463 psi | 89% | 2493 fps | 100% |
| Norma 202 | <<locked>> | 94% | 55,695 psi | 89% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 96% | 53,345 psi | 86% | 2516 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2415 fps | 97% |
| Ramshot Big Game | <<locked>> | 96% | 53,650 psi | 86% | 2543 fps | 99.5% |
| Ramshot TAC | <<locked>> | 90% | 53,519 psi | 86% | 2470 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,709 psi | 89% | 2533 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,360 psi | 87% | 2464 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,867 psi | 56% | 1503 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 56,115 psi | 90% | 2490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 56,275 psi | 90% | 2516 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,983 psi | 87% | 2585 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,809 psi | 86% | 2618 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,062 psi | 69% | 2431 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 90% | 53,359 psi | 86% | 2438 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,883 psi | 90% | 2487 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 53,113 psi | 85% | 2510 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,878 psi | 78% | 2418 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,825 psi | 90% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 56,391 psi | 90% | 2516 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 52,620 psi | 84% | 2418 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,390 psi | 89% | 2146 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,317 psi | 89% | 2487 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,969 psi | 88% | 2566 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,695 psi | 89% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,795 psi | 88% | 2493 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,259 psi | 89% | 2520 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,607 psi | 88% | 2402 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,766 psi | 86% | 2398 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,882 psi | 86% | 2490 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 53,359 psi | 86% | 2402 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,389 psi | 87% | 2493 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,780 psi | 86% | 2510 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,957 psi | 62% | 2372 fps | 98.9% |
| Vihtavuori N120 | <<locked>> | 82% | 56,202 psi | 90% | 2336 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,505 psi | 87% | 2375 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,433 psi | 87% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,766 psi | 88% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,040 psi | 85% | 2438 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2451 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2415 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 90% | 53,490 psi | 86% | 2461 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 54,302 psi | 87% | 2477 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,020 psi | 72% | 2421 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,413 psi | 76% | 2408 fps | 99.2% |
| Winchester 748 | <<locked>> | 92% | 55,753 psi | 89% | 2543 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,752 psi | 88% | 2526 fps | 99.8% |
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% | 40,059 psi | 64% | 2218 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,300 psi | 82% | 2451 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 51,909 psi | 83% | 2461 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 43,540 psi | 70% | 2310 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,561 psi | 52% | 2139 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,609 psi | 62% | 2264 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 30,806 psi | 49% | 2126 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 37,463 psi | 60% | 2316 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 48,704 psi | 78% | 2290 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,095 psi | 79% | 2310 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,840 psi | 59% | 2224 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 80% | 53,214 psi | 85% | 2346 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 35,636 psi | 57% | 2185 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 48,385 psi | 78% | 2392 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,856 psi | 62% | 2238 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 37,463 psi | 60% | 2238 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,744 psi | 72% | 2405 fps | 99% |
| Alliant Power Pro 2000-MR | 39.8 gr | 84% | 37,753 psi | 61% | 2326 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,255 psi | 49% | 2110 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,658 psi | 73% | 2306 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,012 psi | 56% | 2208 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,885 psi | 62% | 2329 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,098 psi | 55% | 2257 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,355 psi | 76% | 2290 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,145 psi | 61% | 2267 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 29,530 psi | 47% | 2106 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,089 psi | 66% | 2238 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,651 psi | 59% | 2247 fps | 98.4% |
| Hodgdon CFE223 | 38.8 gr | 80% | 40,277 psi | 65% | 2359 fps | 97% |
| Hodgdon H322 | <<locked>> | 80% | 44,309 psi | 71% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,628 psi | 72% | 2349 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,871 psi | 64% | 2293 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 37,072 psi | 59% | 2234 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,373 psi | 54% | 2192 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,083 psi | 53% | 2198 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,643 psi | 41% | 1309 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,810 psi | 57% | 2195 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 35,839 psi | 57% | 2241 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,012 psi | 56% | 2165 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,414 psi | 78% | 2362 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 46,296 psi | 74% | 2274 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 50,488 psi | 81% | 2428 fps | 95.4% |
| IMR 4831 | <<locked>> | 96% | 36,419 psi | 58% | 2277 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 33,562 psi | 54% | 2188 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,856 psi | 62% | 2238 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 43,207 psi | 69% | 2310 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 35,027 psi | 56% | 2208 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 37,710 psi | 60% | 2175 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 32,489 psi | 52% | 2126 fps | 96.7% |
| Lovex S065 | <<locked>> | 96% | 43,410 psi | 70% | 2329 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 51,285 psi | 82% | 2359 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,100 psi | 58% | 2185 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 36,056 psi | 58% | 2201 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 32,227 psi | 52% | 2152 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 38,624 psi | 62% | 2323 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 33,939 psi | 54% | 2205 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 41,133 psi | 66% | 2277 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,521 psi | 60% | 2247 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,061 psi | 67% | 2277 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,759 psi | 41% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,569 psi | 70% | 2313 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 46,340 psi | 74% | 2375 fps | 95.3% |
| ReloadSwiss RS 52 | 37.7 gr | 82% | 36,071 psi | 58% | 2287 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,036 psi | 45% | 2110 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 37,942 psi | 61% | 2336 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 39,827 psi | 64% | 2231 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 34,360 psi | 55% | 2146 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 29,689 psi | 48% | 2103 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 96% | 43,410 psi | 70% | 2329 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,027 psi | 56% | 2208 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 32,489 psi | 52% | 2126 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,977 psi | 74% | 2326 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,750 psi | 85% | 2116 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,515 psi | 78% | 2398 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 33,083 psi | 53% | 2192 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,398 psi | 74% | 2323 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,957 psi | 62% | 2247 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,476 psi | 57% | 2198 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,014 psi | 61% | 2162 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,111 psi | 50% | 2047 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 41,379 psi | 66% | 2303 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 37,275 psi | 60% | 2165 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 36,216 psi | 58% | 2205 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 30,908 psi | 50% | 2113 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 28,456 psi | 46% | 2129 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 53,113 psi | 85% | 2300 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,134 psi | 69% | 2228 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,087 psi | 61% | 2165 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,272 psi | 53% | 2146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,069 psi | 55% | 2146 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 27,427 psi | 44% | 2018 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 38,000 psi | 61% | 2274 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 38,667 psi | 62% | 2231 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 32,822 psi | 53% | 2136 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 96% | 39,378 psi | 63% | 2323 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 32,024 psi | 51% | 2123 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 37,536 psi | 60% | 2270 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,316 psi | 55% | 2195 fps | 96.5% |
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 114 powders for .300 CR loaded with the .311 | 190gr | Winchester Silvertip. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,641 fps; across all powders the maximum-charge window runs from 1,467 fps to 2,641 fps. Accurate 4350 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.311" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 CFE223 rank at the top here: for .300 CR with the .311 | 190gr | Winchester Silvertip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Hodgdon H414, Hodgdon H4350 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.