Pressure has no effect on free recoil. Powder burning rate may change the perceived recoil. So many people seem to equate chamber pressure with recoil and often cite the need to protect the old wood. I doubt chamber pressure has any effect whatsoever on the stress the wood endures during firing. An increase in free recoil is likely to put additional stress on the wood. If you want to reduce free recoil the easiest remedy is to reduce the shot charge and/or velocity.
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