Then there's the theory that trigger hands can be over-controlling and the solution a handle that binds up the wrist and prevents gun-steering from the back seat. On the alignment to bore axis bit, I don't think there's a lot of difference between a long radius semi-pistol and a straight hand. Both Browning and Merkel made/or make double-trigger O/Us and both used the semi-pistol and a forend whose depth below the lower barrel is not THAT MUCH greater than the depth of a splinter below the barrels of a sideby gun. I also think that a strait hand or semi-pistol stock forces the wrist to pronate such that the elbow comes up and the pocket with it. How those trap shooters do the Joe Morgan pump with an Etchen grip I have no idea. I'd think that would another source of wrist strain as a tight pistol grip seems to me to bring the elbow down. As to this sliding stuff, I think I flex my palm slightly to get my index finger back to the rear trigger. Always feels better to me to move from the rear to the front trigger but I have not generalized from my experience to a rigid dogma which must apply to all.

jack