For long-session shooting comfort with a J frame I haven't found anything better than the Pachmayr Decelerators. Lots of very cushy rubber behind the backstrap, and plenty to hold on to. Even airweights are painless. Only problem is, they're pretty much oversize K frame size. But boy are they comfortable to shoot.
For something that you might actually carry and still shoot a lot, the Pachmayr Compacs are indeed terrific. Mine were a bit sticky when new, but use, age, sweat and skin oil smooth 'em out nicely.
Shooter686, my most commonly shot 38 loads are 158g lead round nose bullets over 3.2g of Trail Boss. These go about 585fps out of a 442 (625 from a model 10) and are very comfortable loads. For comparison, my carry loads (Hornady 158g XTP, non-+P) go 740 and 785fps from those 2 guns, and the heaviest loads I've shot (Remington 158g lead HP +P) go 820 and 900fps. The Trail Boss loads are clearly comfort shooters.
Trail Boss ain't the cheapest powder on the market, but it meters very accurately and I find it to be clean shooting. And I use it because it is absolutely impossible to overcharge a case with it. Even though I've found it virtually impossible to overcharge a case without consciously manhandling the progressive presses I use (Lee Loadmaster and Dillon Square Deal) I still find it comforting to use a powder that can fill a case and yet do no harm to the gun.