[LtCol Henderson Marriott]

Author Stegmeier used Boss copper-plated bismuth 2 3/4 in shells with 1 1/4 oz No. 5 sized shot,
and these appear to be the fiber wad variety @ 1275 fps velocity. He does not mention shell pressure levels in his article details. I have a small number of these same Boss shells.

I am reasonably certain that if shot cup Boss shells were used instead of the fiber wad variety, his pellet shot percentages on target might possibly go up, along with less damaged or disintegrating pellets and copper fragmentation.
While not knowing for certain, I think his velocity achieved indicates the higher pressure
shells offered by Boss.

I am planning on re-testing my own waterfowl/turkey guns with some newer shells
and may test the author's findings in my own Fox and Smiths.