Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 166gr | Peregrine VRG-2 bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2495 | <<locked>> | 84% | 52,649 psi | 87% | 2543 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,459 psi | 85% | 2559 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,007 psi | 78% | 2579 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 52,881 psi | 88% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,113 psi | 88% | 2687 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 52,953 psi | 88% | 2621 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,114 psi | 90% | 2628 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 51,430 psi | 85% | 2674 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,649 psi | 87% | 2736 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,418 psi | 90% | 2648 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 51,285 psi | 85% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 50,981 psi | 85% | 2690 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,098 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,780 psi | 89% | 2717 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,282 psi | 79% | 2657 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,628 psi | 74% | 2605 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,885 psi | 65% | 2520 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,604 psi | 84% | 2779 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,707 psi | 88% | 2638 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 51,416 psi | 85% | 2612 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,282 psi | 79% | 2657 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 51,329 psi | 85% | 2592 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 52,156 psi | 87% | 2628 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 52,518 psi | 87% | 2690 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 52,634 psi | 87% | 2648 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 53,563 psi | 89% | 2631 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 50,908 psi | 85% | 2621 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,272 psi | 89% | 2664 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,402 psi | 87% | 2723 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 60% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 51,169 psi | 85% | 2582 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,867 psi | 89% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,679 psi | 89% | 2612 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,127 psi | 88% | 2595 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 52,199 psi | 87% | 2628 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,476 psi | 89% | 2628 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 53,954 psi | 90% | 2684 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 52,605 psi | 87% | 2644 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,404 psi | 90% | 2661 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 82% | 52,779 psi | 88% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,214 psi | 87% | 2552 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,592 psi | 89% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 52,808 psi | 88% | 2618 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 53,882 psi | 90% | 2654 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,856 psi | 65% | 2438 fps | 97.1% |
| Norma 201 | <<locked>> | 82% | 51,459 psi | 85% | 2566 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,373 psi | 87% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,027 psi | 90% | 2654 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,634 psi | 87% | 2674 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 49,922 psi | 83% | 2736 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 52,388 psi | 87% | 2677 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 50,981 psi | 85% | 2628 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 51,227 psi | 85% | 2677 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,477 psi | 61% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,228 psi | 87% | 2612 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 51,967 psi | 86% | 2677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 51,474 psi | 86% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,011 psi | 88% | 2710 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,083 psi | 87% | 2736 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 52,069 psi | 87% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 51,619 psi | 86% | 2608 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,069 psi | 88% | 2648 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,765 psi | 88% | 2700 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 51,329 psi | 85% | 2592 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 52,808 psi | 88% | 2618 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 52,779 psi | 88% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,592 psi | 89% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,882 psi | 90% | 2654 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,272 psi | 89% | 2667 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,693 psi | 89% | 2625 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 51,372 psi | 85% | 2595 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 52,794 psi | 88% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,388 psi | 89% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 52,736 psi | 88% | 2575 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,272 psi | 87% | 2694 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 52,228 psi | 87% | 2503 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,635 psi | 89% | 2615 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 51,648 psi | 86% | 2605 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 50,865 psi | 85% | 2677 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,476 psi | 89% | 2677 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 82% | 53,301 psi | 89% | 2490 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,315 psi | 87% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 52,997 psi | 88% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,055 psi | 88% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 51,256 psi | 85% | 2625 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,977 psi | 76% | 2549 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 86% | 54,375 psi | 90% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,577 psi | 89% | 2677 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,690 psi | 83% | 2677 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,389 psi | 90% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 52,518 psi | 87% | 2690 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,001 psi | 66% | 2644 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 51,097 psi | 85% | 2598 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,053 psi | 83% | 2618 fps | 97% |
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% | 46,079 psi | 77% | 2451 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,063 psi | 75% | 2454 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 33,185 psi | 55% | 2320 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 43,642 psi | 73% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,503 psi | 54% | 2313 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 49,574 psi | 82% | 2572 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,235 psi | 70% | 2438 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 45,150 psi | 75% | 2569 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,919 psi | 76% | 2628 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,105 psi | 70% | 2454 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,121 psi | 75% | 2516 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,634 psi | 54% | 2329 fps | 97% |
| Alliant Reloder-17 | 44.5 gr | 80% | 36,666 psi | 61% | 2448 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,280 psi | 74% | 2556 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,495 psi | 69% | 2549 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,701 psi | 44% | 2198 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,258 psi | 57% | 2408 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,400 psi | 51% | 2356 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,081 psi | 82% | 2585 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,047 psi | 70% | 2464 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,495 psi | 69% | 2549 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 39,972 psi | 66% | 2392 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 42,554 psi | 71% | 2467 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 37,362 psi | 62% | 2418 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 40,828 psi | 68% | 2444 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,096 psi | 83% | 2579 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,994 psi | 50% | 2234 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,514 psi | 77% | 2562 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,262 psi | 65% | 2484 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 45% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,153 psi | 80% | 2536 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,517 psi | 84% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,411 psi | 74% | 2467 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,601 psi | 77% | 2490 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 40,553 psi | 67% | 2428 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,986 psi | 65% | 2372 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,546 psi | 52% | 2274 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 46,267 psi | 77% | 2543 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 51,242 psi | 85% | 2612 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 49,269 psi | 82% | 2546 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,240 psi | 82% | 2507 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,396 psi | 74% | 2464 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,361 psi | 60% | 2326 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 36,811 psi | 61% | 2352 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 34,069 psi | 57% | 2339 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 48,414 psi | 80% | 2520 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,950 psi | 81% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,483 psi | 74% | 2507 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,815 psi | 71% | 2507 fps | 95% |
| Norma MRP | <<locked>> | 92% | 37,898 psi | 63% | 2503 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,996 psi | 55% | 2320 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,556 psi | 74% | 2526 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,200 psi | 57% | 2356 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 45% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,873 psi | 71% | 2454 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,472 psi | 81% | 2625 fps | 99.9% |
| ReloadSwiss RS 60 | 44.5 gr | 80% | 39,044 psi | 65% | 2503 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,242 psi | 54% | 2329 fps | 96.3% |
| ReloadSwiss RS 70 | 45.2 gr | 80% | 32,068 psi | 53% | 2333 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 46,079 psi | 77% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,610 psi | 66% | 2415 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 46,630 psi | 77% | 2546 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 43,279 psi | 72% | 2543 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 39,972 psi | 66% | 2392 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,361 psi | 60% | 2326 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,269 psi | 82% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,396 psi | 74% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,811 psi | 61% | 2352 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,712 psi | 68% | 2464 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,212 psi | 83% | 2572 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,109 psi | 80% | 2546 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,574 psi | 82% | 2464 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,582 psi | 69% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,029 psi | 63% | 2323 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,859 psi | 71% | 2536 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,255 psi | 82% | 2464 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,908 psi | 83% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,147 psi | 67% | 2415 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 29,457 psi | 49% | 2274 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 38,261 psi | 64% | 2418 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 50,125 psi | 83% | 2451 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,050 psi | 77% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,644 psi | 77% | 2464 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,363 psi | 64% | 2356 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,272 psi | 57% | 2320 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 40,306 psi | 67% | 2448 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 44,672 psi | 74% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,634 psi | 56% | 2316 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 26,963 psi | 45% | 2211 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,634 psi | 56% | 2293 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 37,579 psi | 62% | 2421 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,005 psi | 42% | 2215 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,819 psi | 79% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,685 psi | 73% | 2513 fps | 95.4% |
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 7 x 64 Brenneke loaded with the .284 | 166gr | Peregrine VRG-2. Alliant Reloder-26 delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,779 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 (415 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.284" calls for a 1:11.0 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 7 x 64 Brenneke with the .284 | 166gr | Peregrine VRG-2 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 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.