Load Specifications
Load data in caliber .270 Win. with .277 | 129gr | Peregrine VLR-5 bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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>> | 84% | 55,550 psi | 89% | 2848 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,940 psi | 86% | 2867 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,333 psi | 90% | 2943 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,548 psi | 86% | 2867 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 54,244 psi | 87% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,505 psi | 87% | 3005 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 54,969 psi | 88% | 2956 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,173 psi | 90% | 2956 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,896 psi | 86% | 2904 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,752 psi | 88% | 2877 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,926 psi | 88% | 3077 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,999 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,243 psi | 85% | 2946 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,028 psi | 90% | 3071 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,476 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,740 psi | 64% | 2785 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,585 psi | 71% | 2953 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,795 psi | 88% | 2969 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 53,055 psi | 85% | 2936 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,359 psi | 86% | 2907 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,564 psi | 89% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,345 psi | 86% | 2933 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,288 psi | 89% | 3031 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 54,027 psi | 87% | 2949 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 54,041 psi | 87% | 3005 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 54,621 psi | 88% | 2966 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 55,521 psi | 89% | 2966 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2936 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,187 psi | 88% | 2999 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,723 psi | 88% | 3041 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 57% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,229 psi | 85% | 2913 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,506 psi | 89% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,448 psi | 89% | 2936 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,347 psi | 89% | 2913 fps | 97.8% |
| IMR 4350 | <<locked>> | 98% | 53,751 psi | 86% | 2933 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,259 psi | 89% | 2940 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,071 psi | 88% | 2995 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 54,621 psi | 88% | 2976 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 53,896 psi | 86% | 2904 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,621 psi | 88% | 2927 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,433 psi | 87% | 2881 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,158 psi | 88% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,621 psi | 88% | 2933 fps | 98.7% |
| Lovex S070 | <<locked>> | 98% | 55,492 psi | 89% | 2969 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 53,577 psi | 86% | 2897 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,099 psi | 87% | 2897 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,666 psi | 89% | 2982 fps | 100% |
| Norma URP | <<locked>> | 98% | 53,621 psi | 86% | 2992 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 88% | 52,982 psi | 85% | 2956 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,057 psi | 90% | 3045 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 54,288 psi | 87% | 2923 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,795 psi | 86% | 2936 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,679 psi | 88% | 2904 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,389 psi | 87% | 2933 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,577 psi | 86% | 3009 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,345 psi | 86% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,288 psi | 87% | 3028 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,809 psi | 86% | 3054 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 54,172 psi | 87% | 2877 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,143 psi | 87% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,939 psi | 85% | 2927 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 53,359 psi | 86% | 2907 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,621 psi | 88% | 2933 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,621 psi | 88% | 2927 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,158 psi | 88% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,492 psi | 89% | 2969 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,042 psi | 88% | 2995 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,376 psi | 90% | 2956 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,388 psi | 86% | 2923 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,259 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,376 psi | 89% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,824 psi | 88% | 2884 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 55,100 psi | 88% | 2936 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,520 psi | 87% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,869 psi | 90% | 2946 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 53,156 psi | 85% | 2923 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,706 psi | 83% | 2995 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,766 psi | 88% | 2799 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,579 psi | 89% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,954 psi | 87% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,650 psi | 88% | 2877 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,955 psi | 88% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,289 psi | 90% | 2992 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 54,389 psi | 87% | 2904 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,924 psi | 85% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,056 psi | 88% | 2992 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,685 psi | 70% | 2864 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 52,997 psi | 85% | 2917 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,331 psi | 87% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,041 psi | 87% | 3005 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,389 psi | 57% | 2779 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,229 psi | 85% | 2930 fps | 100% |
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% | 48,849 psi | 78% | 2753 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,321 psi | 66% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,979 psi | 79% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,036 psi | 75% | 2756 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,131 psi | 63% | 2661 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,549 psi | 57% | 2644 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 45,179 psi | 72% | 2785 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,566 psi | 62% | 2631 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,340 psi | 76% | 2795 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,863 psi | 77% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,423 psi | 66% | 2818 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,014 psi | 61% | 2651 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,843 psi | 65% | 2717 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,824 psi | 57% | 2664 fps | 95.9% |
| Alliant Reloder-17 | 45.5 gr | 80% | 32,953 psi | 53% | 2615 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,676 psi | 49% | 2549 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,824 psi | 57% | 2740 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,614 psi | 72% | 2792 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 37,637 psi | 60% | 2651 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 46,775 psi | 75% | 2789 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,182 psi | 79% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,456 psi | 74% | 2818 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,401 psi | 82% | 2969 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 38,609 psi | 62% | 2657 fps | 96.1% |
| Hodgdon H414 | 50 gr | 90% | 43,874 psi | 70% | 2822 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 51,198 psi | 82% | 2907 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,643 psi | 73% | 2799 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,647 psi | 49% | 2493 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,959 psi | 67% | 2769 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 46,949 psi | 75% | 2904 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 42% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,932 psi | 70% | 2749 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 45,600 psi | 73% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,495 psi | 65% | 2667 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,018 psi | 69% | 2690 fps | 95% |
| IMR 4350 | <<locked>> | 94% | 47,181 psi | 76% | 2822 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,876 psi | 74% | 2776 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 34,490 psi | 55% | 2602 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,872 psi | 67% | 2749 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 47,340 psi | 76% | 2795 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 44,570 psi | 71% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,353 psi | 73% | 2726 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 40,306 psi | 65% | 2671 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,914 psi | 64% | 2661 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 42,946 psi | 69% | 2743 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 44,208 psi | 71% | 2736 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 44,570 psi | 71% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,190 psi | 64% | 2703 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 35,955 psi | 58% | 2648 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 40,132 psi | 64% | 2720 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 40,030 psi | 64% | 2746 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 47,311 psi | 76% | 2802 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,978 psi | 75% | 2822 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,329 psi | 82% | 2851 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 43% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,713 psi | 67% | 2700 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,207 psi | 69% | 2825 fps | 98.4% |
| ReloadSwiss RS 60 | 45.5 gr | 80% | 35,143 psi | 56% | 2687 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,389 psi | 57% | 2661 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,116 psi | 61% | 2733 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,109 psi | 77% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,047 psi | 67% | 2687 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,447 psi | 57% | 2595 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 46,775 psi | 75% | 2789 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,914 psi | 64% | 2661 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,570 psi | 71% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,306 psi | 65% | 2671 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,946 psi | 69% | 2743 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,448 psi | 58% | 2644 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,672 psi | 73% | 2776 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,729 psi | 70% | 2753 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,687 psi | 73% | 2694 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,000 psi | 61% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,092 psi | 72% | 2717 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 51,343 psi | 82% | 2877 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,223 psi | 73% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,382 psi | 73% | 2772 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 36,245 psi | 58% | 2602 fps | 97.8% |
| Somchem S365 | <<locked>> | 82% | 28,007 psi | 45% | 2474 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 51,576 psi | 83% | 2753 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,093 psi | 74% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,713 psi | 67% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,395 psi | 68% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,563 psi | 55% | 2539 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 35,114 psi | 56% | 2595 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 47,558 psi | 76% | 2795 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,785 psi | 65% | 2667 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,970 psi | 59% | 2651 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 33,315 psi | 53% | 2631 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,530 psi | 49% | 2454 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 47,543 psi | 76% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,135 psi | 71% | 2825 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,038 psi | 50% | 2638 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,395 psi | 70% | 2759 fps | 99.3% |
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 112 powders for .270 Win. loaded with the .277 | 129gr | Peregrine VLR-5. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,077 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 129.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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 Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .270 Win. with the .277 | 129gr | Peregrine VLR-5 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.