I started with SAs... c&b bp, actually. My first cf revolver was a Ruger BH conv in .45 - to shoot up my stash of .45 ACPs from my G21, which I sold over eleven years ago. I had to shoot .45 Colts - then 'had' to have a DA .45 Colt. Enamored by the engineering of the Ruger SRH .454 Casull's materials, I got one for .45 Colt - then had to shoot .454s - wow! DA was neat - I could shoot - handheld over sand bags - DA - Hornady 240gr XTP .454 Casulls (2000 fps & 2,130 ft-lb) - at 44yd indoors and get five of six (My rules - I allow a flier!) in 1.5in. That range closed - I joined an outdoor range - and repeated it at 50yd and 1 5/8" for 5 of 6.
I never could duplicate that in anything loaded with .45 Colts - anyone's .45 Colts. My Ruger SAs initially had wide variances and small exit bores - I finally reamed all of them. Sadly, only the custom makers - and F.A. - make proper .45 Colt chambers - the rest of the industry still uses the 'black powder' spec - oversized chambers. Other calibers are more capable - still, I found the answer to generally better DA shooting seven years ago - my first S&W - a new 625-7 ('01) Mountain Gun in .45 Colt. I got a local, ie, crude, trigger job - thankfully, fixable with new Wolff springs. Wow - DA is better! That is the key - a new revolver needs to break in and have a rudimentary trigger job, possibly including lighter springs, before DA shooting will have a chance at equalling SA shooting accuracy.
I find it entertaining to watch others shoot my S&Ws. The first shot, no matter what I tell them, is SA. Then - a DA shot that breaks unexpectedly - and who knows where it went. By the last shot, there is a smile - and well placed shot. This is true for a friend with his revolvers going back four decades - Colts, Rugers, and S&Ws - all with OEM triggers - and different. Mine are all S&Ws - and, sure, my 5-shot 642 or 296 stages a bit differently than my 8-shooter 627s - but not that differently. The key to good DA shooting is a good trigger - for my money, in a S&W. Other than a few CCWs, mine are primarily plinkers.
I shoot DA better... and no longer own anything but S&W revolvers. YMMV.
Stainz