
Load Specifications
Load data in caliber .264 RLB TM with .264 | 139gr | Norma FMJ Elektron bullet and 93 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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 51,082 psi | 87% | 2395 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 51,488 psi | 88% | 2470 fps | 98.7% |
| Accurate 2230 | <<locked>> | 82% | 51,967 psi | 88% | 2480 fps | 99% |
| Accurate 2460 | <<locked>> | 88% | 52,576 psi | 90% | 2457 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 50,444 psi | 86% | 2444 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 50,227 psi | 86% | 2464 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 50,067 psi | 85% | 2480 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 39,189 psi | 67% | 2379 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 84% | 52,011 psi | 89% | 2349 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 52,431 psi | 89% | 2369 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 52,997 psi | 90% | 2510 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 50,923 psi | 87% | 2464 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 84% | 51,561 psi | 88% | 2457 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 52,634 psi | 90% | 2474 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 51,561 psi | 88% | 2461 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 50,734 psi | 86% | 2523 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 52,533 psi | 89% | 2608 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,750 psi | 90% | 2526 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 51,459 psi | 88% | 2405 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 50,198 psi | 85% | 2493 fps | 98.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,002 psi | 70% | 2388 fps | 96.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 46,731 psi | 80% | 2526 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 50,604 psi | 86% | 2349 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 52,402 psi | 89% | 2523 fps | 98.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 52,591 psi | 90% | 2536 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 52,214 psi | 89% | 2425 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 50,546 psi | 86% | 2500 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 90% | 52,634 psi | 90% | 2582 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 86% | 49,966 psi | 85% | 2434 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 51,155 psi | 87% | 2464 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 51,126 psi | 87% | 2497 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 92% | 50,256 psi | 86% | 2480 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,188 psi | 63% | 2290 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 51,271 psi | 87% | 2543 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,301 psi | 58% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 51,648 psi | 88% | 2480 fps | 99.5% |
| IMR 3031 | <<locked>> | 94% | 51,880 psi | 88% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 50,401 psi | 86% | 2448 fps | 98.8% |
| IMR 4198 | <<locked>> | 86% | 51,938 psi | 88% | 2365 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 51,445 psi | 88% | 2523 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 92% | 52,634 psi | 90% | 2474 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 52,504 psi | 89% | 2461 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 52,388 psi | 89% | 2464 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 51,488 psi | 88% | 2493 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 50,662 psi | 86% | 2408 fps | 99.1% |
| Lovex S062 | <<locked>> | 98% | 52,330 psi | 89% | 2487 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 45,542 psi | 78% | 2385 fps | 95.8% |
| Norma 200 | <<locked>> | 82% | 51,329 psi | 87% | 2379 fps | 100% |
| Norma 201 | <<locked>> | 94% | 51,909 psi | 88% | 2467 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 51,764 psi | 88% | 2470 fps | 100% |
| Norma 203B | <<locked>> | 98% | 52,388 psi | 89% | 2526 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 40,205 psi | 68% | 2375 fps | 96% |
| Ramshot Big Game | <<locked>> | 98% | 52,953 psi | 90% | 2552 fps | 99.3% |
| Ramshot TAC | <<locked>> | 90% | 50,183 psi | 85% | 2444 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 92% | 51,779 psi | 88% | 2503 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 50,966 psi | 87% | 2438 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,490 psi | 59% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 52,605 psi | 90% | 2467 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 52,388 psi | 89% | 2484 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 53,055 psi | 90% | 2598 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 49,922 psi | 85% | 2585 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 50,082 psi | 85% | 2415 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 52,257 psi | 89% | 2464 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 48,704 psi | 83% | 2474 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 82% | 52,504 psi | 89% | 2461 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 45,542 psi | 78% | 2385 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 51,488 psi | 88% | 2493 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 52,330 psi | 89% | 2487 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 52,852 psi | 90% | 2441 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 51,750 psi | 88% | 2464 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,169 psi | 87% | 2536 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 51,227 psi | 87% | 2372 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 51,097 psi | 87% | 2464 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 51,590 psi | 88% | 2490 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 51,488 psi | 88% | 2382 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 50,328 psi | 86% | 2375 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 50,125 psi | 85% | 2464 fps | 99.8% |
| Somchem S335 | <<locked>> | 92% | 50,227 psi | 86% | 2382 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 50,560 psi | 86% | 2461 fps | 99.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 49,951 psi | 85% | 2480 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,795 psi | 61% | 2333 fps | 98.1% |
| Vihtavuori N130 | <<locked>> | 88% | 51,343 psi | 87% | 2356 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 51,227 psi | 87% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 50,546 psi | 86% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 52,330 psi | 89% | 2451 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,008 psi | 82% | 2421 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 42,728 psi | 73% | 2382 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 90% | 49,922 psi | 85% | 2434 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 96% | 50,705 psi | 86% | 2454 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 41,249 psi | 70% | 2382 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,019 psi | 75% | 2372 fps | 98.5% |
| Winchester 748 | <<locked>> | 92% | 51,576 psi | 88% | 2513 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 50,792 psi | 86% | 2497 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 37,347 psi | 64% | 2195 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 48,341 psi | 82% | 2425 fps | 98.2% |
| Accurate 2230 | <<locked>> | 80% | 48,254 psi | 82% | 2428 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 40,234 psi | 68% | 2280 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 30,008 psi | 51% | 2119 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 35,563 psi | 61% | 2234 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 28,427 psi | 48% | 2103 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 36,260 psi | 62% | 2323 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 46,035 psi | 78% | 2270 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,412 psi | 79% | 2287 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 34,330 psi | 58% | 2198 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 86% | 35,404 psi | 60% | 2201 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 44,947 psi | 77% | 2365 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,260 psi | 62% | 2211 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 34,664 psi | 59% | 2218 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,481 psi | 71% | 2375 fps | 98.4% |
| Alliant Power Pro 2000-MR | 28.2 gr | 86% | 37,681 psi | 64% | 2346 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 29,834 psi | 51% | 2126 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,598 psi | 73% | 2283 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 34,418 psi | 59% | 2221 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 38,638 psi | 66% | 2343 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 33,591 psi | 57% | 2267 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,643 psi | 76% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 37,782 psi | 64% | 2283 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 28,950 psi | 49% | 2123 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,421 psi | 65% | 2211 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,866 psi | 58% | 2221 fps | 97.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 37,289 psi | 63% | 2326 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 80% | 41,307 psi | 70% | 2310 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 41,727 psi | 71% | 2326 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 39,465 psi | 67% | 2310 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 34,476 psi | 59% | 2208 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 32,924 psi | 56% | 2201 fps | 95.4% |
| Hodgdon LEVERevolution | 25.7 gr | 80% | 30,719 psi | 52% | 2169 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,338 psi | 43% | 1302 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,301 psi | 57% | 2165 fps | 96% |
| IMR 3031 | <<locked>> | 80% | 33,156 psi | 56% | 2218 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 34,867 psi | 59% | 2185 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 43,874 psi | 75% | 2260 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 33,054 psi | 56% | 2205 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 36,260 psi | 62% | 2211 fps | 97.7% |
| Lovex D073.4 | <<locked>> | 80% | 49,284 psi | 84% | 2418 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 40,132 psi | 68% | 2283 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,329 psi | 55% | 2182 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 35,418 psi | 60% | 2149 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 30,139 psi | 51% | 2100 fps | 95.9% |
| Lovex S065 | <<locked>> | 98% | 42,873 psi | 73% | 2343 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 48,283 psi | 82% | 2339 fps | 100% |
| Norma 201 | <<locked>> | 80% | 33,794 psi | 58% | 2165 fps | 97.1% |
| Norma 202 | <<locked>> | 80% | 33,547 psi | 57% | 2178 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 31,763 psi | 54% | 2169 fps | 95% |
| Norma URP | <<locked>> | 98% | 37,811 psi | 64% | 2329 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 84% | 33,504 psi | 57% | 2221 fps | 95.1% |
| Ramshot TAC | <<locked>> | 86% | 43,816 psi | 75% | 2343 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 34,983 psi | 60% | 2221 fps | 96% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,508 psi | 67% | 2254 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,643 psi | 44% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,799 psi | 69% | 2290 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 45,963 psi | 78% | 2388 fps | 95.1% |
| ReloadSwiss RS 52 | 26.7 gr | 84% | 35,636 psi | 61% | 2303 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,050 psi | 48% | 2136 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 37,405 psi | 64% | 2215 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 32,024 psi | 55% | 2119 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 86% | 31,111 psi | 53% | 2165 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 49,284 psi | 84% | 2418 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 42,873 psi | 73% | 2343 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,329 psi | 55% | 2182 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 30,139 psi | 51% | 2100 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,033 psi | 73% | 2300 fps | 98.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,440 psi | 77% | 2375 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,070 psi | 60% | 2260 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,665 psi | 61% | 2146 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 41,626 psi | 71% | 2320 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 32,880 psi | 56% | 2169 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,665 psi | 61% | 2139 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,037 psi | 49% | 2024 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 38,609 psi | 66% | 2280 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 35,041 psi | 60% | 2146 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 33,692 psi | 57% | 2178 fps | 95.4% |
| Somchem S355 | <<locked>> | 84% | 30,501 psi | 52% | 2133 fps | 95.1% |
| Somchem S365 | <<locked>> | 94% | 29,921 psi | 51% | 2195 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 40,567 psi | 69% | 2208 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,665 psi | 61% | 2146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 30,719 psi | 52% | 2123 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 31,531 psi | 54% | 2119 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 26,977 psi | 46% | 2034 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 98% | 39,813 psi | 68% | 2329 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 36,158 psi | 62% | 2208 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 80% | 30,255 psi | 52% | 2110 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 98% | 38,812 psi | 66% | 2336 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,214 psi | 58% | 2192 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 34,853 psi | 59% | 2241 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 31,807 psi | 54% | 2165 fps | 95.6% |
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 93 powders for .264 RLB TM loaded with the .264 | 139gr | Norma FMJ Elektron. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,608 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 .264 RLB TM with the .264 | 139gr | Norma FMJ Elektron 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.