If your 30 inch barrel feels too light and/or whippy then maybe.
But then barrel weights may help that. Try to shoot a 32 inch barrel to see how you like it. As reyper stated all that are personal preference.
If you shoot doubles well with the 30 inch barrel, then try some single barrel guns for singles and/or handicap.
I shoot my 30" doubles gun for 16 and 20 yard trap and see no difference to shooting my 34" KX6S. I suspect longer yardage shooters might have a problem with a 30" gun. Also depends on what load you're shooting.
I shoot a 34" unsingle. When I pick up a 30" double it feels too short.
32" seems to be the popular choice these days. I watch the guns for sale adds and it looks to me as if the 30" guns move slower than the 32". If preferred 30" I wouldn't let that sway my purchase. shoot what works for you. There are plenty of people that wouldn't shoot anything but a 30"
I had a 32" barreled shotgun that I owned for about 3 days. Never shot it and new it wasn't for me.
Like someone else said, ask someone if they would let you use their gun and see if it is something you like or not.
I believe the barrel weight plays into the equation. Some of the Beretta 30 in. barrels are just too light. I even added Skeet Man's brass weights to a set of 32in to barrels to bring the weight to an acceptable level.
I say buy the 32 inch barrels and forgetaboutit!!! If you find them a tad to heavy? Which I doubt most shooters can!!! Buy some Titanium chokes for the gun. Then it will be exactly the same as a 30 inch barrel.
When you go to sell the shotgun, and or barrel down the road. You'll Thank Me for this Info!!!! break em all Jeff
If I remember correctly some years back Al Ljutic, who was a pretty smart guy, did a study of barrel lengths, and concluded that 33" was ideal. My guess is that would vary some depending upon the shooter's size.