In Roster's booklet there are Longshot loads using that very same wad. But his loads are buffered.
Actually he mentions that it's perfectly acceptable to load his recipes without buffer. He makes the caveat that by omitting buffer you won't see as good of a pattern in comparison to having it. It's all there in his booklet, and I've loaded his recipes with and without buffer.
^^^This.
Omitting buffer will change pattern density (usually for the worse at distance and maybe better at closer ranges), DECREASE the pressure, sometimes INCREASE velocity (usually marginally), and shorten height of wad/shot column (and thus may affect crimp quality if no adjustments are made).
