Your auto appears to be setup for heavy loads, as it looks to me like the bevel inside the governor ring (between the bronze friction ring and the recoil spring) is facing the beveled surface of the friction ring.
For light loads, the governor ring's opposite/flat surface should be against the bronze friction ring.
The magazine tube requires light lubrication for proper operation (gun oil).
Since I'm unfamiliar with the brand, I cannot comment on the shotshell load for your Beretta, other than to say the gun's certified for any commercial ammo - but may beat your shoulder to death with heavy loads, even though the gun itself may be able to handle same.
You'll certainly find out, the first time you pull the trigger on one.