I am not sure how many times this issue has been addressed on this Forum, but it has been a heap of times. I have a Tomcat and must of responded three or four times in threads on the subject.
As you know, there is not an issue with the silver/chrome Tomcat. There were some early blued Tomcats which were not wide sllides with some problems with the + ammo as stated above. Then there began the production of the blued wide slide which are not a problem. I once posted the width dimensions. You can go back and search for those to see if your pistol is the old or newer Tomcat. Otherwise, you may want to call or email Beretta on your pistol for definitive information vs. us other users with opinions.
They are nice little pistols, and it is what my spouse conceal carries.