It this for your Beretta 10Ga 3 1/2 with single trigger and chrome lined barrels?
I did find a 1 1/4 load here for the long hull
http://www.alliantpowder.com/reloaders/RecipeList.aspx?gauge=10>ypeid=10&shotype=1Mike
Non-Toxic Shotshell Hull,10 Gauge 3 1/2-in. Rem (yellow base wad)
1 1/4 shot wt. •Steel • Primer,Fed 209A •Wad,Precision Reloading TUPRW105
Dram Equiv. Shot Wt.(ounces) Shot Type Velocity (fps) Primer Powder Wad Grains Approx. psi
1 1/4 Steel 1,590 Fed 209A Steel Precision Reloading TUPRW105 50 9,800