Interesting point on trigger stop. Many wannabe gunsmiths get into the actions in their attempt to lighten the da pull and F up the sa to a point sometimes of getting push off Point being never know when you will loose your trigger stop and get DQ'd. Had that happen many times at Nationals and competitor would run back to one of the venders depending on make of gun and have them put the angle back on the sa to pass weight test. Don't know if you can do this in your matches.
On the newer S&W revolvers with the "floating" firing pins, you can get away with a little lighter hammer fall and still get consistent ignition(depending on primers being used)Federal is much more sensitive than Winchester, Remington, or CCI. One of the reasons some reloader makers do not recommend Federal being used in their machines, in fear of accidental ignition in priming or in the fill tube.
Lot of shooters feel a "hard" hammer strike contributes much to accuracy giving the consistent primer ignition you don't get with the lighter strike, along with eliminating the misfires.
As a real good friend used to tell me key to good shooting is putting them all in the center. LOL