16 gauge 7/8 loads using filler wad

[matt koepnick]

hey to all those in the group. have been chasing the elusive 7/8 loads with the stuff i have on hand. i'm down to my last 150 of my DR16 wads i have from years ago. i'd successfully assembled a good low recoil load for the misses to shoot well with these and Greendot. i have looked over all the info over ours and the 16 Guage Society. today i settled on this one from their site.
7/8 oz lead
cheddite 2 3/4 hull
SG16 wad
CX2000 primer
.150 thick 28 guage filler wad under shot
19.5 gr of universal
says 1165 fps at 8100 psi

wad/shot column stacked up almost identical in height to my current Greendot /DR16 loads. made zero changes to Mec jr press, including using the same powder bushing as the green dot. the Universal gave more weight with same volume i guess.
now i am wondering if i could accomplish the same results using my old 1 oz loads , with Unique /SG16 and adding the under shot filler to make a 7/8 load.
adding a filler wad under shot is entirely new to me. i'm looking for sage wisdom from
those in the know. thanks for any help. matt k