Roskoe, my brother just had a case of 28 ga. wads given to him. so I will give some a try in my 54. They do fit nicely!

zac76156 the sub bases are not used for there gas seal, but to keep preasure from blowing away the base of the bullet.

>>>>>>>>>>>>&g t;>>>>>>>>>>>> >>>>>>>>

Here is a test that I did with my GM 27" 54cal. back in 1988.

All shot with Goex FFF and .535RB

90. 1594
100 1642
110 1740
120 1808
130 1867
140 1916

Also:

I was looking for a load to shoot saboted Hornady 44x 265grain in my 50 Kodiak. 28" bbl.
Goex powder.

160 FF 1820
170 FF 1890
180 FF 1890

150 FFF 1900

I wish I would have clocked the lighter loads, but you can see were the FF quits gaining.