Hi,
Good question!
Grooved . . . but ONLY on revolvers I plan to shoot in single action mode! In other words, bullseye competitions, hunting and silouhette matches.
On a target or hunting revolver I want a very wide trigger face that's grooved. When you have your perfect grip and perfect trigger finger position and mechanics, the grooves help you focus the pressure on the finger pad best.
However, for defensive purposes, bowling pin matches, practical/tactical handgun competitions . . . in other words, for DOUBLE ACTION use, smooth trigger faces are the way to go. This is because the recoil and torque of the revolver will probably cause the grip to shift ever so slightly and the grooves will thus lock you down on the trigger with a possibly incorrect finger position vs. grip position for subsequent shots.
Shooting quickly and accurately in defense or action competitions requires the shooter to master "staging" the double action trigger during the time the gun's barrel gets flipped into the air during recoil . . . and as the gun is smoothly swung to the next target position. The goal is to have the trigger pulled smoothly to about 99% of the way before it first again . . . JUST AS THE FRONT SIGHT COMES DOWN ON THE TARGET PRECISELY!
The narrow, smooth trigger face allows the shooting to do this more efficiently! Thus . . . on revolvers for double action use I want a very narrow trigger that's smooth and contoured in every way.
COMPETITION WILL SHOW YOU THE DIFFERENCES . . .
When I started shooting in bowling pin matches years ago I was like most "rookies" who had learned to shoot revolvers accurately . . . I shot single action and got my butt totally kicked. Sure, I could always shoot accurately . . . but the double action boys were hitting the targets too, but about THREE TIMES FASTER than I could clear a six pin table at ten yards.
THAT REALLY OPENED MY EYES!
Why have a revolver for protection if the other guy can put three rounds accurately in your direction while you are still trying to thumb cock your second round? Mastering double action makes all the difference . . . and smooth triggers help!
I soon started practicing my double action techniques and, on short order, got to the point where I was winning the majority of matches in my area. I actually can shoot my double action S&W revolvers faster, and with better accuracy, than my 1911-style single action autos!
In mastering my technique, I read about the narrow, smooth triggers for the fastest double action revolver work, and I tried it on my chopped N-frame S&W 25-2.
This wheelgun began life as a 6" barreled TARGET revolver in .45ACP. It came with the widest grooved target trigger that S&W ever made probably. It is approximately twice as with on the trigger face as most!!!
Since this revolver was already heavily customized anyway I thought, "What the heck, I'm gonna radically narrow that wide target trigger!"
Removing the trigger, I ground down the wide trigger to a very narrow width and also totally smoothed and radiused the trigger face into a really slick and smooth narrow "combat" trigger.
I REALLY loved the improvement this made in my double action matches!!!
It remains my favorite "pin gun" and I've gotten my 6-pin table clearing times down to around 3.50-3.70 seconds (HAMMER DOWN . . . 10 yds. from the low ready position; starting with the random-start reaction time to a PACT timer).
If you haven't shot matches with a timer before, it takes MOST of us mortals at least one full second to react to the beep, quickly raise the gun to a good sight picture and crank off an accurate round . . . leaving only about 2.5 seconds left to react to the recoil, swing to the next target (while rolling the cylinder to the next round . . . all in about 1/2 second left for each pin).
You obviously can't average shooting a pin each 1/2 second at ten yards, thumb cocking the revolver. Nobody can.
Yep, for fast double action work . . . make mine slick little narrow and rounded triggers. Since we'll all be shooting double action anyway if the SHTF, I wish all defensive caliber revolvers came with narrow, smooth-faced triggers!
Hope this helps!
T.