Shotgun Load

[rockefr]

I have a Beretta o/u black powder shotgun built in 1980. what would the correct load of ff be for the gun.
thank you

[MPP1423]

Rockefr,i Have A Knight Bp Shotgun Thats Made For Max Loads Such As 3 1/2 Mag Power And Use 120 Grs Of 777.i Know This May Not Be What Your Looking For But If Mine Uses 120 Grs Then For Normal Loads I'd Say Around 60-80 Grns.but Im No Expert.