Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 140gr | Sierra GameKing 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 60, Alliant Reloder-17 and ReloadSwiss RS 70.
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>> | 82% | 51,576 psi | 86% | 2710 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,635 psi | 89% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,664 psi | 89% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,766 psi | 89% | 2776 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 53,548 psi | 89% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,243 psi | 88% | 2904 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,244 psi | 90% | 2858 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 51,953 psi | 86% | 2805 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,156 psi | 88% | 2808 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,722 psi | 89% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,780 psi | 89% | 2972 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,793 psi | 86% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,228 psi | 87% | 2848 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 51,416 psi | 85% | 2910 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,112 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,972 psi | 65% | 2690 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,482 psi | 72% | 2848 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,795 psi | 89% | 2867 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 52,199 psi | 87% | 2841 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,562 psi | 87% | 2808 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 51,706 psi | 86% | 2743 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,388 psi | 87% | 2835 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,389 psi | 90% | 2936 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,185 psi | 88% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,113 psi | 88% | 2851 fps | 99% |
| Hodgdon H414 | <<locked>> | 94% | 54,288 psi | 90% | 2927 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 51,358 psi | 85% | 2815 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,676 psi | 84% | 2835 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,041 psi | 90% | 2900 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,243 psi | 88% | 2933 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,346 psi | 59% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 51,503 psi | 86% | 2802 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 53,171 psi | 88% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,751 psi | 89% | 2825 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,447 psi | 89% | 2799 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 52,533 psi | 87% | 2831 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,346 psi | 90% | 2841 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,776 psi | 79% | 2799 fps | 98.8% |
| IMR 4895 | <<locked>> | 88% | 53,563 psi | 89% | 2877 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 53,156 psi | 88% | 2808 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,664 psi | 89% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,693 psi | 89% | 2785 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 51,068 psi | 85% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,519 psi | 89% | 2831 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 54,360 psi | 90% | 2864 fps | 97.7% |
| Norma 201 | <<locked>> | 86% | 53,026 psi | 88% | 2805 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,359 psi | 89% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 88% | 51,488 psi | 86% | 2835 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 52,243 psi | 87% | 2887 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 88% | 51,967 psi | 86% | 2861 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 51,227 psi | 85% | 2884 fps | 97.9% |
| Ramshot TAC | <<locked>> | 84% | 53,403 psi | 89% | 2825 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,779 psi | 88% | 2841 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,041 psi | 90% | 2808 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,984 psi | 60% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,490 psi | 89% | 2835 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,359 psi | 87% | 2907 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,909 psi | 86% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,924 psi | 88% | 2923 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,678 psi | 88% | 2949 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 54,056 psi | 90% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,272 psi | 89% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,069 psi | 87% | 2835 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,562 psi | 87% | 2808 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,519 psi | 89% | 2831 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,664 psi | 89% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 51,068 psi | 85% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,360 psi | 90% | 2864 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,664 psi | 89% | 2894 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,619 psi | 86% | 2799 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,431 psi | 87% | 2825 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 51,256 psi | 85% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 51,430 psi | 85% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,056 psi | 90% | 2789 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 54,128 psi | 90% | 2838 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,940 psi | 90% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 51,401 psi | 85% | 2792 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 52,591 psi | 87% | 2831 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,328 psi | 84% | 2897 fps | 100% |
| Unknown powder | <<locked>> | 96% | 53,316 psi | 89% | 2897 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 82% | 54,244 psi | 90% | 2707 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 51,517 psi | 86% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,127 psi | 88% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,882 psi | 90% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,664 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 51,329 psi | 85% | 2835 fps | 99% |
| Vihtavuori N530 | <<locked>> | 84% | 53,621 psi | 89% | 2808 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,011 psi | 86% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,824 psi | 89% | 2890 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,612 psi | 71% | 2769 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,648 psi | 86% | 2815 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,853 psi | 89% | 2861 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,288 psi | 90% | 2927 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,940 psi | 58% | 2687 fps | 98.1% |
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% | 48,530 psi | 81% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,452 psi | 69% | 2592 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,905 psi | 78% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,253 psi | 79% | 2667 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,204 psi | 65% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,259 psi | 59% | 2566 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,889 psi | 75% | 2697 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,029 psi | 63% | 2543 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,920 psi | 78% | 2707 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,224 psi | 78% | 2694 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,640 psi | 68% | 2720 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,782 psi | 63% | 2569 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,567 psi | 67% | 2631 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,433 psi | 59% | 2575 fps | 95.6% |
| Alliant Reloder-17 | 44.4 gr | 80% | 32,503 psi | 54% | 2526 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,589 psi | 51% | 2474 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,956 psi | 63% | 2720 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,990 psi | 73% | 2700 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,318 psi | 62% | 2569 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 46,354 psi | 77% | 2700 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,472 psi | 81% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,629 psi | 76% | 2723 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,517 psi | 84% | 2871 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,676 psi | 83% | 2740 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,203 psi | 63% | 2572 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,135 psi | 73% | 2746 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,281 psi | 75% | 2710 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,414 psi | 51% | 2415 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 65% | 2628 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 92% | 46,050 psi | 77% | 2802 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 44% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,219 psi | 67% | 2595 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,147 psi | 68% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,304 psi | 62% | 2520 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,599 psi | 74% | 2641 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 46,383 psi | 77% | 2723 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,324 psi | 75% | 2684 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,795 psi | 58% | 2536 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,568 psi | 69% | 2664 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,920 psi | 78% | 2707 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,077 psi | 73% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,730 psi | 74% | 2631 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,871 psi | 66% | 2582 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,624 psi | 66% | 2579 fps | 95.4% |
| Lovex S070 | <<locked>> | 90% | 42,612 psi | 71% | 2657 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,005 psi | 73% | 2654 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 44,222 psi | 73% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,958 psi | 66% | 2621 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 35,563 psi | 59% | 2566 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,349 psi | 65% | 2628 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 42,105 psi | 70% | 2713 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 46,833 psi | 78% | 2710 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,383 psi | 77% | 2733 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,473 psi | 84% | 2753 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,876 psi | 45% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,278 psi | 69% | 2612 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,743 psi | 71% | 2736 fps | 98.3% |
| ReloadSwiss RS 60 | 44.4 gr | 80% | 34,577 psi | 57% | 2595 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,275 psi | 62% | 2631 fps | 95.9% |
| ReloadSwiss RS 70 | 49.7 gr | 88% | 37,623 psi | 63% | 2641 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 48,008 psi | 80% | 2694 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,901 psi | 70% | 2605 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,128 psi | 58% | 2513 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 46,354 psi | 77% | 2700 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,624 psi | 66% | 2579 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,077 psi | 73% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,871 psi | 66% | 2582 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 42,612 psi | 71% | 2657 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,187 psi | 60% | 2562 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,179 psi | 75% | 2687 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,395 psi | 72% | 2667 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,295 psi | 75% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,710 psi | 63% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,425 psi | 74% | 2628 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 50,720 psi | 84% | 2785 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,976 psi | 75% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,802 psi | 74% | 2680 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,114 psi | 60% | 2523 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 27,905 psi | 46% | 2402 fps | 95.9% |
| Unknown powder | <<locked>> | 86% | 38,711 psi | 64% | 2625 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 51,082 psi | 85% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,629 psi | 76% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,321 psi | 69% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,785 psi | 69% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,229 psi | 57% | 2457 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 34,737 psi | 58% | 2513 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 46,862 psi | 78% | 2700 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,350 psi | 67% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,419 psi | 61% | 2566 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 32,851 psi | 55% | 2549 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,385 psi | 50% | 2379 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 50,328 psi | 84% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,135 psi | 73% | 2746 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,690 psi | 51% | 2549 fps | 95.8% |
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 7 x 64 Brenneke loaded with the .284 | 140gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,972 fps. Accurate 3100 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 (415 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for 7 x 64 Brenneke with the .284 | 140gr | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.