They're light on shot, but heavy on the dram equivalent, so you shouldn't have any problems putting them through a Beretta. My 390 and SBE II both shoot them without issue.
I actually just went to my local Academy and they were out of the Monarch's in 12, so I went with my usual Remington Hevi-Load, I have the Beretta 3901 and love the gun, I have only had it a year and need to do more experimenting with various ammo.