Tamid, if you use a full choke, it will make you a lot better shooter.
This ......... absolutely.
I proved that for myself many years ago when I won AA class in the S X S event at the 2010 U.S. Open at Tunica, MS. I was shooting an out of the box BSS with 30" barrels and the factory Mod (RT) and Full (Left) chokes. I have shot an old Perazzi with Mod. and Mod. (.020") competitively at sporting clays for the last 15 years or so, and it has made me a much better shooter. I've shot two or three 100 X 100 scores and numerous 99 X 100s with it. I tried the "normal" way of using a gun with screw-in chokes and changing them to suit the presentation at nearly every station but found that to be counter-productive for me. For me it introduces the negative thought that I need to open up my pattern to the maximum usable amount in order to "keep from missing" a close or erratic target. Knowing that I can drop two shells in the chambers and break any presentation they will show me on a reasonably set course gives so much more confidence in myself and my gun. And,
that translates into dustballs, which builds confidence even more.