[Big Friend Ten (BFT)]

PS: I buy components from Precision Reloading

One can buy one fired hulls that were shot in a kiln gun. I do not know chamber specifications for an industrial kiln gun. I would not be surprised that if someone is having problems with wad fit in a once fired hull, that the subject hull(s) was shot in a kiln gun. Those shells are loaded at higher pressure than those made for our old 8 gauge shotguns. Maybe the plastic is compressed by the extra pressure, and oversized by firing in a larger (by a few thousands of an inch) chamber.