The less the shot charge and less the velocity, the less the recoil and generally less the chamber pressure. A slow moving target you might get away with 1100 psi or a little less and compensate for less impact energy by using larger size shot.
As stated watch out for cold weather. I've heard that some powders such as PB lose as much as 20 percent energy at temperatures below 32F . Squibs are rare but I have heard of them happening.
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Hybrid Mode