Load Specifications
Load data in caliber .277 Fury Commercial with .277 | 150gr | Brenneke TOG bullet and 97 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 60 and ReloadSwiss RS 52.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 55,999 psi | 89% | 2457 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,592 psi | 87% | 2480 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,114 psi | 86% | 2477 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,333 psi | 89% | 2536 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 53,853 psi | 85% | 2513 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,240 psi | 78% | 2516 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 82% | 55,492 psi | 88% | 2408 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,912 psi | 89% | 2431 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,332 psi | 88% | 2543 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 56,144 psi | 89% | 2536 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 56,681 psi | 90% | 2520 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,288 psi | 86% | 2500 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 54,346 psi | 86% | 2484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,231 psi | 89% | 2595 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,621 psi | 87% | 2638 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,550 psi | 88% | 2556 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,970 psi | 89% | 2464 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,333 psi | 89% | 2575 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,385 psi | 77% | 2516 fps | 97.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,043 psi | 89% | 2661 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,520 psi | 86% | 2405 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,882 psi | 87% | 2552 fps | 98.8% |
| Bofors RP3 | <<locked>> | 96% | 56,202 psi | 89% | 2572 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 56,507 psi | 90% | 2533 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,521 psi | 90% | 2490 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 57,000 psi | 90% | 2575 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,100 psi | 87% | 2608 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 84% | 54,926 psi | 87% | 2497 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,391 psi | 89% | 2526 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,606 psi | 85% | 2526 fps | 98% |
| Hodgdon H4895 | <<locked>> | 90% | 55,825 psi | 88% | 2552 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2411 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,549 psi | 86% | 2579 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,969 psi | 55% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,461 psi | 85% | 2503 fps | 99.5% |
| IMR 3031 | <<locked>> | 90% | 55,143 psi | 87% | 2539 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,724 psi | 88% | 2523 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,362 psi | 89% | 2507 fps | 96.4% |
| IMR 4198 | <<locked>> | 84% | 56,260 psi | 89% | 2428 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,347 psi | 88% | 2520 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,789 psi | 74% | 2461 fps | 97.4% |
| IMR 4895 | <<locked>> | 92% | 54,302 psi | 86% | 2556 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 54,288 psi | 86% | 2500 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 54,549 psi | 86% | 2490 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,447 psi | 86% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,998 psi | 87% | 2474 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 55,274 psi | 88% | 2523 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,099 psi | 86% | 2510 fps | 97.3% |
| Norma 201 | <<locked>> | 90% | 53,708 psi | 85% | 2490 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,114 psi | 86% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,434 psi | 88% | 2562 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 48,718 psi | 77% | 2507 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 94% | 55,811 psi | 88% | 2585 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 54,882 psi | 87% | 2513 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,983 psi | 86% | 2530 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,550 psi | 88% | 2503 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 56% | 1552 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,201 psi | 86% | 2487 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,491 psi | 86% | 2516 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,521 psi | 90% | 2635 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,811 psi | 88% | 2664 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2536 fps | 97.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,676 psi | 79% | 2552 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 55,027 psi | 87% | 2480 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,244 psi | 86% | 2490 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 55,622 psi | 88% | 2559 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 56,507 psi | 90% | 2533 fps | 95.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,099 psi | 86% | 2510 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,447 psi | 86% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,274 psi | 88% | 2523 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,925 psi | 85% | 2461 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,942 psi | 90% | 2530 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,882 psi | 85% | 2566 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,029 psi | 90% | 2484 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,797 psi | 90% | 2543 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,927 psi | 90% | 2559 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,782 psi | 88% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,709 psi | 88% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,824 psi | 87% | 2470 fps | 96% |
| Somchem S321 | <<locked>> | 86% | 55,564 psi | 88% | 2533 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,795 psi | 87% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,130 psi | 89% | 2536 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 56,275 psi | 89% | 2559 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,700 psi | 69% | 2464 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 86% | 55,883 psi | 89% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,782 psi | 88% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,058 psi | 90% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,897 psi | 87% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,244 psi | 86% | 2497 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,459 psi | 82% | 2510 fps | 98% |
| Vihtavuori N530 | <<locked>> | 88% | 54,839 psi | 87% | 2500 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 56,130 psi | 89% | 2516 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,517 psi | 80% | 2513 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,243 psi | 83% | 2500 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 54,201 psi | 86% | 2543 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,707 psi | 84% | 2566 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,594 psi | 90% | 2566 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,019 psi | 70% | 2293 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,935 psi | 76% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,463 psi | 58% | 2215 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,931 psi | 68% | 2343 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 34,505 psi | 55% | 2198 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 39,914 psi | 63% | 2359 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 52,228 psi | 83% | 2365 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,605 psi | 83% | 2385 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,335 psi | 64% | 2300 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 36,738 psi | 58% | 2211 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 52,852 psi | 84% | 2470 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,322 psi | 67% | 2310 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 41,698 psi | 66% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,197 psi | 78% | 2490 fps | 99.2% |
| Alliant Power Pro 2000-MR | 36.1 gr | 82% | 39,015 psi | 62% | 2359 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,692 psi | 53% | 2182 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,777 psi | 79% | 2382 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,158 psi | 57% | 2231 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,350 psi | 64% | 2369 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,201 psi | 56% | 2283 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,111 psi | 81% | 2362 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,160 psi | 62% | 2293 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 33,025 psi | 52% | 2178 fps | 95.8% |
| Bofors RP7 | <<locked>> | 98% | 53,142 psi | 84% | 2484 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,338 psi | 70% | 2310 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,756 psi | 65% | 2326 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,614 psi | 71% | 2448 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,443 psi | 77% | 2408 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,211 psi | 78% | 2431 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 41,539 psi | 66% | 2329 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,625 psi | 64% | 2310 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,577 psi | 55% | 2224 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,535 psi | 58% | 2277 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 41% | 1348 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,088 psi | 62% | 2267 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 39,842 psi | 63% | 2316 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,216 psi | 57% | 2195 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,663 psi | 83% | 2454 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 50,009 psi | 79% | 2346 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,170 psi | 83% | 2474 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 38,653 psi | 61% | 2320 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,014 psi | 59% | 2260 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,322 psi | 67% | 2310 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 47,500 psi | 75% | 2392 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 38,856 psi | 62% | 2283 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 40,857 psi | 65% | 2251 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 35,766 psi | 57% | 2198 fps | 97.1% |
| Lovex S065 | <<locked>> | 94% | 45,208 psi | 72% | 2372 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 39,624 psi | 63% | 2260 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 39,740 psi | 63% | 2277 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 35,549 psi | 56% | 2224 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 40,350 psi | 64% | 2359 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,070 psi | 56% | 2231 fps | 95% |
| Ramshot TAC | <<locked>> | 82% | 45,121 psi | 72% | 2359 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,510 psi | 66% | 2329 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,963 psi | 73% | 2359 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 41% | 1381 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,659 psi | 76% | 2395 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,616 psi | 75% | 2411 fps | 95.1% |
| ReloadSwiss RS 52 | 34.1 gr | 80% | 37,449 psi | 59% | 2316 fps | 95.5% |
| ReloadSwiss RS 60 | 34.6 gr | 80% | 30,821 psi | 49% | 2185 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,453 psi | 67% | 2425 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 46,369 psi | 73% | 2493 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 43,569 psi | 69% | 2310 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,594 psi | 60% | 2218 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 33,185 psi | 53% | 2175 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 98% | 53,142 psi | 84% | 2484 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,208 psi | 72% | 2372 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,856 psi | 62% | 2283 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 35,766 psi | 57% | 2198 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,285 psi | 80% | 2411 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,200 psi | 84% | 2480 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,535 psi | 58% | 2270 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,256 psi | 80% | 2398 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,105 psi | 68% | 2333 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,885 psi | 62% | 2270 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,075 psi | 65% | 2231 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,895 psi | 54% | 2110 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,024 psi | 81% | 2418 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 45,426 psi | 72% | 2382 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 40,683 psi | 64% | 2238 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,900 psi | 63% | 2283 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 34,156 psi | 54% | 2185 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 31,792 psi | 50% | 2215 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 46,528 psi | 74% | 2297 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,263 psi | 65% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,709 psi | 58% | 2215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,681 psi | 60% | 2221 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 30,545 psi | 48% | 2087 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 92% | 39,798 psi | 63% | 2316 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 42,395 psi | 67% | 2310 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 35,998 psi | 57% | 2201 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 41,336 psi | 66% | 2362 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,273 psi | 56% | 2201 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 41,597 psi | 66% | 2349 fps | 99.1% |
| Winchester 760 | <<locked>> | 98% | 49,574 psi | 79% | 2516 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,043 psi | 60% | 2270 fps | 97% |
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 97 powders for .277 Fury Commercial loaded with the .277 | 150gr | Brenneke TOG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,664 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,664 fps. Accurate 4350 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:10.5 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 60, ReloadSwiss RS 52 rank at the top here: for .277 Fury Commercial with the .277 | 150gr | Brenneke TOG 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.