Im surprised you are having a hard time with those loads.
I use 3.5 #2's with 1.5oz from federal. i don't care how dirty, nor what most people think. i can tell ya, every goose i shot at has not got up from its nap.
this load is bigger than the 10 ga loads. i took apart both shells, and was surprised on the difference. plus the federal loads are $26, why over pay on non performing hype garbage loads.
#2 at 40-50 yards, puts em in a death spin.
- i do use a extended choke i got from al's corner store.
just my 2 cents.
good luck