Dean,
In theory slower burning, progressive powders do lessen felt recoil. The difference is most often not detectable by shooters. The gunstock may however greatly benefit from using a slower burning powder.
Shooters can however very easily detect the difference in recoil between X drams of black powder and X dram equivilent of any smokeless powder. Of course black powder explodes upon ignition and smokeless burns. Any physicists care to comment on this?
Mark
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